Category: News

The Farm Carbon Calculator just got better!

Posted on April 4, 2025 by - Calculator, News

As a leading carbon assessment tool, The Farm Carbon Calculator is updated on a regular basis. We do this so you benefit from the most recent science, can access additional features, and have an improved experience completing reports. Read on to find out more.

Key Takeaways

  • Reports ending on or after 01 April 2025 will use the updated emissions factors outlined in What’s Changed 2025
  • Some changes have been backdated to improve all reports from 01 January 2000 onwards – these will only be applied if you recalculate a report or edit an item.
  • To maintain a record of your original report, LOCK and do not edit old reports
  • Instead, make a copy of an old report – this will apply any backdated changes and give you the option to compare to the original report to see what has changed
  • If you are making a new report you will have many more options for adding:
    • Specific sprays (branded herbicides, fungicides etc.) “Inputs > Sprays” section
    • Branded & generic fertilisers “Inputs > Specific fertilisers” section
    • Imported organic fertility sources and the emissions from their application “Crops > Organic fertility sources”
    • Potential sequestration from Agroforestry areas “Sequestration > Agroforestry” section
Photo credit: Rob Purdew – Farm Carbon Toolkit

Our Development Cycle

Every April we release updates to the methodology behind the Calculator as well as tweaks to the ways reports are made. 

This Spring we will update the calculator 3 times; 

  • Our annual comprehensive methodology and functionality update.
  • Improvements to how we calculate livestock emissions.
  • Improvements to our calculations of land-use change emissions.

We’ll focus here on the first of these which will launch on 1 April 2025. Our methodology is the combination and range of formulas which sit behind the calculator and help us calculate emissions on any farm in the UK. We have updated the emissions factors in this methodology, we added new ones, and we have acted on your feedback to improve the way the calculator looks and feels to ensure the system continues to work for you.

Emissions Factors – if you were wondering – are the variables used in the formulas behind your report. They tell us, for example, the emissions produced when fuel is burned, and the emissions produced in manufacturing the fuel in the first place.

Our updated methodology is used for the main calculator at https://calculator.farmcarbontoolkit.org.uk, and also by many users of external applications. For example, many farm management systems, banks, and consultants rely on our methodology, as well as multiple white labelled or more specialised calculators across the agricultural industry, and beyond – like the Equine Carbon Calculator.

We’re talking here about thousands of farms creating multiple thousands of reports every year – our team spends the bulk of their time ensuring everything fundamental is right!

We know changes to methodology affect carbon reports, and carbon reports reflect your farm – so you deserve to know a bit about how this is changing. Let’s ask the obvious question first:

Why does the methodology keep changing?

In short, because the underlying sources have changed or updated. The calculator sits on top of thousands of hours of research and experience, coming from within our team over 16 years of development, from agronomists and farmers, from academia, and the research arms of governments and international organisations. The result of this work is the wide range of sources you can see on our references page. 

Emissions factors change 

Every spring, all emissions factors are checked, and in some cases are changed – for our April 2025 methodology that is 3,000 existing factors, and 7,000 new ones! We update some factors to match new versions of existing data sources, such as annual governmental data sets like the UK GHG inventory which details UK industrial emissions. Our factors and data sources also change as new items are added, better sources become available, and in some cases, factors change because sources fall out of use as they become outdated or irrelevant. Overall the methodology relies on 114 references which can be found on our references page, or listed with each item in our data collection sheet, which can be downloaded from our resources page.

Changes to emissions factors also occur because more industries are undertaking more rigorous carbon footprinting so we can get a better estimate of the emissions from producing, transporting and using various products. This work provides us more granular detail on emissions and allows us to give you more options when selecting items in your reports. 

Moreover, as sectors decarbonise, the emissions associated with utilities and commodities change, and thus we need to update emissions factors to reflect this. As an example, this year the emissions associated with the average tariff for electricity have reduced by nearly 10%, due to an increase in the proportion of electricity coming from renewable energy. We therefore want you to see the benefit in your reports as industries decarbonise, so your electricity use this year will be lower than the year before even if the same quantity of energy is used. This should not deter you from making your own efforts to decarbonise, but does allow you to share the benefits of UK progression. 

Emissions calculations undergo review

Sometimes the calculations underlying your report change because of an improved understanding of biological systems or a re-interpretation of the available evidence. In a developing field like agricultural carbon footprinting, working with other organisations to make sense of the available evidence and international guidance within the UK context can help us identify areas where calculations can be improved. This is why we continue to seek pre-competitive collaborations with other companies and research organisations (to find out more about the projects and harmonisation work).

One such calculation that has undergone re-interpretation is the calculation underpinning organic fertility emissions. With a better understanding of the underlying processes, and the components relevant to the equation, we have been able to add more specificity and more options to the organic fertility options. You will now see options for when and where fertility sources are applied, and for manures you will have the ability to select application approaches – meaning emissions mitigation approaches such as deep-injection of slurry are appropriately adjusted. Changes like these allow you to better understand your carbon footprinting journey and allow a more nuanced appraisal of your farming emissions. We are striving to increase the specificity of the calculator, aiming to provide you the user with the opportunity to enter the highest tier of emissions calculation. 

There are 3 tiers of GHG emissions calculations

Tier 1: This tier uses default emissions factors and data from the IPCC for different climatic regions to generate broad estimates. The use of global data and a general approach results in low accuracy.

Tier 2: This method enhances accuracy by using emission factors specific to a country or region and more detailed activity data, such as local energy consumption. This approach is more accurate than Tier 1 because it incorporates factors that are more relevant to the specific conditions of the region.

Tier 3: Uses real-time data, sophisticated models, and system-specific emission factors, and is the most accurate method, using detailed modelling or direct measurements, as well as highly specific data for the particular circumstances of the country or sector.

We are striving for tier 3 where practical in your reports, however, the reality is that most people do not have time to enter the copious data required for accurate calculation at tier 3.

Changes to the calculator

As explored above, an update like this one has introduced many changes, you will see these highlighted in full: 

One example of an item on the calculator that has recently changed is sugar beet crop residues. In 2024, we updated and improved our methodology that accounts for the N2O emissions associated with crop residues decomposing in the field after harvest. This used crop N contents and harvest index ratios from the UK GHG Inventory (1990- 2021 Inv) plugged into the IPCC 2019 refinement crop residue calculation, making it a Tier 2 method. This calculation gave sugar beet a relatively high emissions factor compared to other crops.

This year the UK GHG inventory released a new version (1990 – 2022), which has updated their values for sugar beet. This update by the UK GHG inventory includes adjusting the harvest index, lowering N contents for aboveground and belowground residue and lowering above to below-ground residue ratios; all of which are used for “deriving a country-specific parameter for sugar beet residue emissions”. This has resulted in a 77 – 89% decrease in the April 2025 update depending on the residue management practice. As this is such a large change, which has been updated with better data, we have decided to backdate this emissions factor to ensure drastic changes between years for the same amount of crop residue are not reported. 

Not all changes in the calculator are this drastic, and in the “What’s Changed” document you will see a list of changing emissions factors.

So will my carbon footprint go up or down?

We can’t predict with certainty how annual updates will affect your report because every farm is different, but we know there will be changes. It very much depends on what you do on the farm and the best way to see this will be to copy a report, change the end date and see for yourself. We will see some examples of farm reports below. Changes to how you farm will, in most cases, have a larger and more important monitorable effect than changes to the methodology we talk about here.

In other words – if it is your focus, keep looking for ways to reduce emissions on your farm! Bear in mind that changes to practice can take time to show up in your carbon footprint and may have other impacts, be it environmental (benefitting biodiversity, reducing water use, cleaning soil and air pollution), social (ensuring food security, providing jobs, leaving space to roam, nurturing communities) or financial (boosting profits, building resilience, or ensuring financial security). These impacts may not result in reduced carbon emissions, however at FCT we fully support farmers taking a holistic all-encompassing approach to improving their sustainability. If you would like support or advice on reducing your farm’s footprint as part of the wider context of your farm, our advisors can help.

The rest of this blog will dig into some examples of what might change for some example reports.

Visualising the changes with example reports

We have created example farm reports that compare emissions factors before and after the April update for various farming systems. These reports, which span April 2023 to March 2024 and April 2024 to March 2025, use consistent items and quantities to ensure the thing changing is the emissions factors. It’s crucial to remember that actual farm reports will vary year-to-year due to changes in both practices and purchased materials, not just emissions factors.

As you can see in Figure 1, comparing the same reports across both periods does not result in large differences. Table 1 gives the percentage change in the total carbon emissions (tCO2e) and total carbon balance (which includes carbon removals by sequestration – tCO2e) for each report. On average, reports with the updated emissions factors resulted in a decrease in total carbon emissions and total carbon balance. This will vary depending on what items have been chosen in reports. 

Figure 1. Carbon emissions and sequestration in tonnes of carbon dioxide equivalent (tCO2e) for farm reports for the years 2024 and 2025. These reports represent individual farm examples and do not represent an average of that farming sector.

The dairy report experienced an increase due to livestock feeds being updated with the latest Global Feed LCA Institute source (GFLI). In comparison, the poultry and the beef report experienced a decrease in emissions due to updating this same source, as some feed items have increased, whilst others have decreased.

The large decrease in the carbon balance for the poultry report is due to a combination of emissions factors decreasing e.g. livestock feeds and bedding (-21.58%), materials (-8.86%) and fuels (-5.43%) alongside changes in carbon sequestration factors (-8.75% i.e. an increase in sequestration), resulting in a relatively large decrease in the carbon balance. 

The arable and horticulture report have remained relatively similar with changes below 5%. To see a more detailed breakdown of what changed in these reports and in the calculator, check out our What’s Changed document. 

Report% Change in Emissions% Change in Balance
Arable0.871.11
Beef-10.48-11.65
Dairy3.785.43
Horticulture3.543.91
Poultry-9.16-54.30
Average-2.29-11.10
Table 1. The percentage change in carbon emissions and carbon balance for each report.

It’s not just changes – there are new items too!

Importantly, we also use this update to add in new items that people have requested. In this update you can expect to see: 

  • Over 6000 more specific sprays (branded herbicides, fungicides etc.) 
  • Over 100 more branded & generic fertilisers
  • The ability to search an item in the inputs section to quickly find your item on our system
  • Over 400 new imported organic fertility sources and the emissions from their application in different seasons and with different application methods
  • New options for agroforestry and silvopasture including a range of densities and ages of woodland
  • New options to enter market garden crops on a smaller scale 
  • New options to enter landscaping materials associated with paving and decking

For a full list of what has been added see the “What’s Changed” document, or the data collection sheets, where new Items have been flagged with a star. 

Communicating this change

If you need to communicate this article in a sentence, for example alongside your report within a supply chain, or to accompany a project you are involved in, use this:

The Farm Carbon Calculator has updated its emissions factors in line with the latest data sources – detailed information about what has changed can be found at https://calculator.farmcarbontoolkit.org.uk/resources

Further support

Contact Michael Brown at calculator@farmcarbontoolkit.org.uk

Supporting Innovation in Soil Health: Our Collaboration with LandApp

Posted on March 24, 2025 by - Calculator, News

At the Farm Carbon Toolkit, we’re excited to share news about our recent collaboration with Land App to support the development and launch of their new Soil Survey feature on Land App Mobile.

As part of the Agri-Carbon Kernow project in Cornwall, our team played a role in helping develop and test this tool, which is designed to help farmers and land managers record, report, and review both lab and in-field soil measurements. 

A Collaborative Effort

Working closely with the Land App team, we brought together our expertise in soil health and carbon to create a digital soil sampling solution that meets real-world needs. 

By integrating the robust soil survey methodologies we advocate in our projects into Land App’s platform, we’ve enabled farmers to gain deeper insights into soil health and carbon sequestration potential. The new feature not only helps users assess soil conditions with greater accuracy but also supports more informed decision-making for sustainable land management, as well as the evidence required for the Sustainable Farming Incentive (SFI).

The new Soil Survey feature enhances Land App Mobile’s suite of data collection tools—joining the General Data Collection survey and PTES’ Healthy Hedgerows—to provide reliable insights into soil health, which are essential for informed land management and funding applications.

Why It Matters

  • Digital Efficiency: Easily record and review soil sample data on the go, including the ability to support evidence required for SFI.
  • Sustainable Impact: Empowering better land management decisions through accurate, real-time data.
  • Collaborative Innovation: A tangible outcome of our work in the Agri-Carbon Kernow project, highlighting the benefits of cross-sector collaboration.

We’re proud to have supported Land App in bringing this feature to life and look forward to further innovations and collaborations. This includes using the Land App API to help users seamlessly manage their soil data within each platform.

Thank you to the team at Land App for their partnership—and for the opportunity to help shape tools that support sustainable land management!

Find out more

For further details and to see the Soil Survey feature in action, please refer to the Land App’s guidance.

Reflections on the 7th Carbon Budget from the  Climate Change Committee

Posted on March 19, 2025 by - Insights, News

By Liz Bowles, CEO, Farm Carbon Toolkit

Every five years, the Committee on Climate Change (CCC)1 publishes a statutory report detailing the UK’s ‘carbon budget’ for a future five-year period. The 7th Carbon Budget covers the period 2038-2042. It is a stock-take of UK GHG emissions (current and future) and provides advice to the Government on how and where these emissions will need to be reduced (‘the pathway’) if the UK is to meet its legal obligations to reduce emissions to net zero by 2050. 

This report came out with other reports and consultations such as the Defra Land Use Framework Consultation and the IGD’s Net Zero Transition Plan for the UK Food System. Certainly how we produce food and look after agricultural land in the UK is coming more and more under the spotlight.

Within the 7th Carbon Budget report, it is good to see that the role of land use change in removing carbon is now being linked to agricultural land which gives a truer picture than was previously the case, when land use change was in a separate silo.

It is clear that the carbon budget is very high level, focussing on climate impacts only, with little reference to the impacts of the proposed changes on biodiversity across the UK’s agricultural land. In reviewing this budget, FCT has taken a very practical viewpoint and has reflected on areas where the budget could have helpfully provided more detail and looked at how to fully engage with farmers and growers across the land who are on the delivery frontline.

As other sectors decarbonise, the proportion of total emissions arising from agriculture will increase, putting more pressure on the sector to make progress on emissions reduction and carbon removals. In 2022 the contribution of agriculture to overall UK emissions was 12%. By 2040 this is predicted to rise to 27%, after the activity to reduce emissions set out in the carbon budget and it will be the second highest emitter after aviation even with the target action outlined in this carbon budget.

The report proposes a pathway for agriculture to reach net zero by 2050. Not surprisingly woodland creation, peatland restoration and other land use changes are highlighted as mechanisms to sequester more carbon. There is significant reliance on carbon sequestration into land sinks through the 2040’s but little reliance on any level of carbon sequestration into soil itself. 

There is a reliance on increased tree planting from the late 2020’s onwards as trees will only start to sequester larger volumes of carbon from 15 years of age onwards. According to the UK Woodland Carbon Code, sequestration rates for woodland increase dramatically during the “teenage years” of woodland establishment. In total, woodland creation has been modelled to contribute 15% to emissions reduction by 2050 . This will require an additional 1.1 million ha of woodland to be planted by 2050. In addition some 300,000 ha of lowland peat and 970,000 ha of upland peat will be returned to natural/ rewetted condition by the same time.

For agriculture the reduction in overall GHG emissions is targeted at 45% by 2050 compared to 2022, coming primarily from a reduction in livestock numbers (38% by 2050) with a relatively small contribution from the adoption of low carbon farming practices. These reductions are significant, reducing the breeding flock of sheep from 15 to 11 million ewes and the breeding cattle herd from 3 to 2 million head.

The reduction in grazing livestock numbers will release land for tree planting. The combined effect of the changes to farming practice and tree planting is to suggest that the sector will become a net sequesterer of carbon by 2048.

There are a number of important assumptions included within this budget which bear further scrutiny:

  • Crop yields will increase by 16% by 2050. Presumably this increase is deemed necessary to ensure adequate plant based foods to replace the current levels of meat in our diets. However it is questionable whether this will be achievable in practice, even if gene editing technologies are successful and fully deployed as more adverse weather events are already affecting yield levels in the UK and across the world. It is not clear how critical to successful achievement of the overall plan this is.
  • Stocking rates for grazing livestock on lowland will increase by around 10% with stocking rates in the upland reduced. Presumably the former is to allow for more land to be released to grow crops for human consumption and the latter to reflect the current over-grazing in parts of the upland and to reflect rewetting of upland peatlands and the proposals for tree planting. Targeting increased stocking rates for lowland livestock could require additional artificial fertiliser inputs which would seem counter intuitive, though the increased stocking rate could potentially be achieved through improvements in grassland utilisation efficiency.
  • Consumption of meat products (primarily beef and lamb) will fall by 35% by 2050 compared to 2019 levels. On first sight it would appear that changes in consumption are mirroring proposed reductions in livestock numbers, however, no mention is made of any changes in dairy cow numbers, but since the majority of beef produced in the UK comes from the dairy herd this will also impact milk production. Consideration is also given to replacing meat in ready meals with plant based alternatives which will negatively affect carcass balance, with lower value “cuts” often used for this purpose at the moment. This would put further pressure on sector profitability. The targeted reduction in ruminant livestock numbers would lead to a lower requirement of permanent grassland for grazing of a similar order to the reduction in livestock numbers. This would amount to around 3 million ha which could be diverted for other use, where this is possible. Tree planting would be a key use for poorer quality ground (topography and stoniness) with better quality grassland moving to arable cropping where this is possible. This would probably lead to loss of carbon from soils, especially when permanent grassland is first transitioned to arable cropping2. It is not clear whether this has been accounted for within the overall budget. 
  • The carbon budget includes a very low value (0.5Mt CO2e per year for carbon removed by grassland soils). This appears to be low and seems to take little account of the ability for well-managed livestock systems to bring multiple benefits beyond reducing emissions including carbon removals into soils and enhanced biodiversity.

    More research and data analysis is required urgently to inform us of the ability of the soil to permanently and reliably store more carbon and how best this can be done. We have some information as do others, but as yet this is not a body of evidence which the CCC can use as part of its carbon budget.
  • Returning around 300,000 ha lowland peat to a rewetted state will impinge upon its current use for growing vegetables, fruit and arable crops. The report does mention that some 10% of horticultural production will move indoors, which is likely to focus on leafy salad type crops. However for field scale vegetable production left to be grown outdoors the question remains as to where they will be grown. Moving vegetable growing to other parts of the UK will require careful site selection if current levels of margin (currently pretty low) are to be maintained and consideration of the infrastructure required, such as pack houses and cold stores.

There were also a number of notable omissions from the budget:

  • Whilst the pathway to reduce nitrous oxide emissions are recognised as coming primarily from agriculture, there is no mention of the need to reduce reliance on fossil fuel based N fertilisers. For arable cropping, up to 75% of total emissions arise from the production and use of artificial N fertiliser. Great work is being done to produce low carbon alternatives, but further information on the likely “winning technologies” in this space would have been helpful.
  • The level of efficiency of the UK to produce food at a lower GHG intensity than some other nations, utilising fewer arable resources (land and feed) and with lower supply chain discards through a circular feed system provides the nation with a competitive advantage in terms of overall emissions per unit of home grown food. This could be better recognised within the budget report.
  • There is no mention of any target to reduce numbers of pigs and poultry within this 7th Carbon Budget. Whilst the animals themselves do not emit methane, their manures do and their reliance on imported soya has a significant impact on overall UK agriculture emissions as well as the soil degradation associated with cereal production to grow the cereals they wholly rely on. We have estimated that reducing reliance on imported soya by 50% and moving to feeding UK grown beans and pulses will reduce the emissions from agriculture by 7% (primarily due to reduced reliance on artificial N fertiliser and to removing deforestation emissions on 50% soya supply).

Reliance on land use change to enable agriculture to reach net zero by 2050

In the period from 2043-2050 agriculture and land use are budgeted to contribute the largest share of net emissions reduction (35%) – see figure 2 below from the Carbon Budget report, and to reach net zero emissions by 2050 as a result of increases in carbon sequestration into land sinks (primarily increased areas of woodland and reduced emissions from peatland due to changed management) with emissions of around 25Mt CO2e and sequestration of around 26Mt CO2e per year. Current emissions from UK agriculture are around 48Mt CO2e per year.

Distribution of emissions reductions during each carbon budget period (Climate Change Committee, Seventh Carbon Budget, 2025)

At FCT, we are in agreement with the Agriculture Advisory Group of the UK Climate Change Committee and its report in calling for more nuanced targets which better reflect the benefits of UK livestock production, especially when it is primarily based on the consumption of forages. We also agree with their view that it is important to reflect on the impact of the different gases on warming aligned to the Paris Agreement temperature goal. Both GWP100 and GWP* metrics are important and could already be reported in concert to inform on both GHG accounting (CO2e) for national inventories and impact of different GHGs on climate warming (CO2e) important for the Paris Agreement. 

We believe that the report could be much more positive about the contribution that resilient farming businesses, agricultural land and farmers can make to meeting the climate change challenge. Positive engagement and empowerment of farmers, growers and land managers are critical elements in building confidence and encouraging investment but is currently patchy, with beacons of good practice such as the Farm Net Zero project in Cornwall, which is delivering change on the ground and practically supporting farm businesses to transition towards net zero.

Footnotes

  1. A body set up to hold the government to account on their progress towards net zero and reducing emissions
  2. The UK GHG inventory suggests that the average change in non- organic soil carbon density (to 1M deep) from converting grassland to cropland in England is -24 tonnes C/ ha, in Scotland is -101 tC/ha, Wales -39 tC/ha and NI -68 tC/ha

Reducing greenhouse gas emissions from grassland

Posted on March 17, 2025 by - Insights, News

The key areas of grassland management that are known to significantly reduce greenhouse gas emissions are fertiliser application and management of applications, grazing management, introduction of more diverse species into grassland including legumes and herbs, and correct use and application of farmyard manures and slurries

Effective, efficient use of artificial N fertilisers

Greenhouse gas emissions from synthetic fertilisers is a significant emissions source on grassland farms. 50% of emissions come from the production of the synthetic fertilisers and about 50% from the processes that take place in the soil after application. Estimates suggest that 10-30% of all applied nitrogen fertiliser is lost to the crop or grassland to which it is applied; use efficiency is influenced by application method and environmental conditions at the time of spreading. Make sure soil pH is above 6.5 if possible, soils are not compacted, that soil temperature is warm and rising and that soils are not not waterlogged. Do the basics well and you will get better yield response from your fertilisers and lower GHG emissions.

Reliance on Inorganic N fertiliser usage can be reduced through incorporating more legumes into swards. Establishing clover within temporary leys has additional benefits of higher protein forage and also a more diverse rooting system which can aid production in adverse climatic conditions. Typically grass clover swards containing around 30% clover by DM can fix around 120Kg – 180 Kg N /ha/ year. When they are in the sward, this is free nitrogen fertiliser!

As we are coming to appreciate that the nitrous oxide emissions associated with inorganic N fertilisers are a huge part of agriculture’s total emissions, improving N fertiliser use efficiency is critical.  Saving 170kg N/ ha across 50ha will reduce emissions  by around 58 tonnes CO2e which is more carbon than is sequestered annually in 10ha of broadleaf woodland.

Grazing Management

Grazing rotation is an excellent way to increase grass utilisation and reduce GHG emissions. Ensure there are adequate rest periods between grazing cycles to allow the sward to recover to optimise soil and plant health. Consider sub-dividing fields further to  allow for more regular livestock  movement. The long term effect of increasing rest periods and grazing taller grass is improved soil organic matter and soil structure. This will aid in reducing weed burden, lengthen the grazing season and improve resilience to flood and drought.

Including deeper rooting and more traditional species will increase above and below-ground biodiversity which may increase productivity alongside potential carbon capture and sequestration deeper into the soil profile. Ensure that grassland species composition supports production goals, soil type, soil pH and climatic conditions and consider overseeding where required. 

Overseeding permanent pasture with improved diversity can provide a wide array of benefits.  If 5 ha permanent pasture was over-seeded or re-seeded to create a herbal ley (consistent with SAM3 SFI) it could provide an additional -15.68 t CO2e of carbon removed per year. This will also build soil health and resilience by optimising the above ground canopy increasing the surface area of leaves for photosynthesis and supporting a greater below ground biodiversity responsible for cycling nutrients.

Accurate consideration of manures and slurries

Sampling and analysis of your farmyard manures and slurries will enable optimal accounting for the nutrients in them. Knowing what you are applying will enhance the accuracy of nutrient management planning and could reduce the requirement for synthetic N fertiliser. Consider the application method when applying organic manures to avoid nutrient losses and if possible cover muck heaps like silage heaps where possible to avoid dilution and runoff of nutrients. 

Grassland Manager of the Year 2025

Posted on February 20, 2025 by - Carbon Farmer of the Year, News

Andrew and Clare Brewer: 2025 winners in the National Arable and Grassland Awards 

Andrew Brewer is our FCT Carbon Farmer of the Year 2024 and we are delighted to congratulate him and Clare on scooping the National Arable and Grassland award for Grassland Manager of the year. Andrew is also one of our Demonstration Farms in the Farm Net Zero Project in Cornwall which is supported by the National Lottery.

Andrew and Clare are pictured in the centre of the photo with sponsors and judges

They were worthy winners in this category. The Awards are supported by a wide range of industry businesses including BASIS and the National Association of Agricultural Contractors.  

Soil Farmers: Leaders in Soil Management

Posted on January 27, 2025 by - Insights, News, Soil Farmer of the Year

Written by Jonathan Smith, Impact Manager, Farm Carbon Toolkit

For the last 10 years, Farm Carbon Toolkit has hosted the Soil Farmer of the Year (SFOTY) competition, seeking out the farmers and growers across the UK who are doing the best job at improving their soils and underpinning their businesses with healthy soil management. The 2025 competition is open now and you can enter here, as well as see details of our past winners. The competition runs in partnership with Innovation for Agriculture and is supported by Hutchinsons and Cotswold Seeds.

Over the years we’ve had many inspiring finalists, so we thought we’d share information on some of the winners, what they’re doing on soil management, and some top tips.

Growing soil biology

In 2018, SFOTY winner Simon Cowell, an arable farmer from Essex delves deep into soil biology to create the conditions for his crops to thrive. He makes his own compost and applies it at 2-4 tonnes/acre, more as an inoculant than as a fertiliser, as Simon explains:

It’s not being used as a fertiliser source or for organic matter, it’s purely an inoculation for the soil biology and a home to grow biology that will benefit the soil. Within a few weeks you can see the difference where it has been applied

Through a mixture of crop rotation, on-farm trials and compost, the use of applied Nitrogen has decreased dramatically and the use of agrochemicals. Noticing that the plants nearer the hedge look healthier, Simon comments:

My aim is to get the biology and fungal network to transfer all those benefits throughout the fields, although it’s going to be a slow process.

Farmers should be beekeepers

Over in Oxfordshire, another arable farmer was the 2019 winner. Julian Gold grows a range of crops on 800 ha, with a small flock of sheep to manage the green manures. He’s over 10 years into his journey of minimising tillage and covering the soil as much as possible. He’s tuned in to his soils and how they’re working now:

If you know your soil and are on the right trajectory, you don’t need to do soil testing. I can see the straw disappearing and see worm middens, I know it’s healthy and doing what it should be, but it can take time.

Trials with Universities and Research Institutes has been common on the farm over many years, and has looked at greenhouse gas emissions, soil health and biodiversity on the farm. Julian advocates that all farmers should be beekeepers:

…….as with all things its about a change of mindset. This is true of fertiliser use, crop protection and carbon farming

Using electric fences instead of fertiliser

In 2022, Herefordshire farmer Billy Lewis demonstrated how his mixed farm had turned around and really improved its soil massively. A combination of direct drilling, applying compost, mob grazing, reduced inputs and introducing legumes has transformed the soil health, productivity and profitability.

On the new grazing system, Billy comments:

Since beginning our rotational grazing system we no longer apply fertiliser to our permanent pasture. You will grow ten times more grass with an electric fence than you will with a bag of fertiliser.

Fertiliser use has reduced by 50% over 3 years, with an aim to eliminate it in the future

Noting that arable crops have become much more profitable now, and the livestock more relaxed and healthy, Billy believes this is down to both a reduction in inputs and an improvement in soil biology.

When we dig up any legume species, be it in a herbal ley, cover crop or in the clover living mulch, we’re seeing plenty of nodules forming and more importantly we are noticing that they are active due to the dark purple colour when they are sliced open.

Becky Willson at FCT’s Field Day in 2024, running a session on soil health at Billy Lewis’s farm

12 million worms per hectare

Arable farming can face greater challenges in rebuilding soil health and carbon. 2021 winner Tom Sewell is farming over 1500 acres in Kent with his wife Sarah. The farm is both at a serious scale but also working across a range of soil types. Minimum cultivation and direct drilling have been used for some time on this farm and Tom was an early adopter.

Through a combination of providing minimum disturbance, and adding organic matter – through straw, cover crops and compost, the organic matter has gone up worm counts are very healthy. Tom reckons there are 12 million worms per hectare!

A ‘simple system’ that maximises soil health has allowed them to reduce fertiliser use by 10% per year, yet maintain yields and improve soil health continuously. Tom says:

I just want to improve the soil, I use compost and feed the worms, they’ll do the rest.

Using all the tools

Over at Overbury Farms in Gloucestershire, 2020 winner Jake Freestone farms over 1500 hectares with a diverse arable rotation, plus 1,000 sheep across a wide range of soil types. Jake is using fungal-rich seed dressings to improve germination, soil biology and reduce costs. 

Nitrogen fertiliser is being reduced, other inputs reduced, cover crops experimented with extensively and sheep being a key part of the rotation. “

Jake comments:

Ultimately we are trying to use all the tools that we have to improve soil organic matter, water infiltration and wider water management, soil structure and soil biology to achieve the long term goal of improving our resilience both for our crops, our business and our soil.

A 10-year transformation

Back to mixed farms and in 2023 winner Stuart Johnson in Northumberland demonstrated how 10 years of work has transformed his farm, primarily by reducing inputs, improving soil health and livestock productivity. Moving to a strip-tillage system and mob grazing platform has provided financial success alongside a more resilient business. 

Stuart has now eliminated fertiliser on his grassland and fungicides in the arable crops, instead utilising an integrated system with the livestock and compost teas to grow what is needed on the farm. The farm is currently in a seven-year rotation of a five-year legume/herb mix followed by a two-year arable break with full grass grazing for the sheep and cattle meaning that there is no need to buy in additional supplementary feed over the summer months.

Herbal leys and vegetables

Bringing us right up to date, 2024 winners Tracey Russell and David Neman at Bucksum Farm in Buckinghamshire show in this video how herbal leys and vegetables sold directly is working successfully.

Creating their own compost, using extensive herbal leys (grazed by sheep), they also incorporate living mulches amongst the vegetable row crops. Incorporating top fruit and chickens too, the farm is an exemplar of how to grow fruit and veg in a sustainable rotation whilst improving soil health.

Learn even more!

We also have amazing 2nd and 3rd place Soil Farmers from each year, and you can read more about them here.

Don’t forget, if you think your farming practices are worthy of being entered in the competition, please do consider entering the 2025 Soil Farmer of the Year competition. It’s free – what have you got to lose?

A day in the life of… Joseph Jones, Farm Carbon and Soils Project Assistant

Posted on March 13, 2025 by - Insights, News

My name is Joe and I work at FCT as the Farm Carbon and Soils Project Assistant. I’m coming up to the completion of my first 12 months at the organisation and so it feels like a good time to reflect on what has been an exciting journey so far and what my day-day consists of. 

Beginning 

In my early days at FCT, I felt very welcomed by the team but I knew I had a challenge as I had to get to grips with many aspects of farming which I was not familiar with, coming from a non-agricultural background. I was very lucky to be able to shadow and observe different members of our knowledgeable advisor team during farm visits and soil sampling trips around Cornwall, Devon and Somerset. Although I learned many valuable things, the two most important lessons I took away were the importance of different people working together to solve the challenges that we are facing as a country, and that sometimes it’s more important to just listen to what someone wants to say than to have to say something back. 

After my initial training period, I began to conduct my own farm visits, learning more about the variety of farming systems and the people at the heart of those systems, and what their visions and worries were looking into the future. From these visits I would use our great Calculator to look through the carbon lens and see what was happening on these farms and see where the farms could get more efficient but also closer to net zero. In writing the reports and handing them back I got to see what information would be most interesting to the farmers and hopefully useful to their farm’s management decisions. Now, when I look back, I can see how much I’ve learnt, but I also know that what is left to know is endless. I think I have come to accept that, which is very liberating too.

Day to Day

My day to day is very variable, but I can summarise some key activities and projects that I work on for FCT. The main one is the incredible Connecting Constable & Gainsborough Country, one of the largest Landscape Recovery projects in England. It is a collaboration between two farm clusters in Suffolk and Essex and the Suffolk Wildlife Trust. Most of my time is spent conducting farm visits, understanding the farmer’s system and motivations, processing the data , and then writing the reports and handing them back to the farms involved. 

Another exciting but more hands on project I assist with is the England Ecosystem Survey (EES). The largest survey ever conducted in the UK, me and my colleague Jemma have visited some beautiful sites in the West Country to collect soils following the detailed protocol set by Natural England. Once the data has been gathered and analysed we will have the most comprehensive set of soil dataset covering England.  Lastly, the final project I am involved with is CHCx3. This is an exciting collaboration between agricultural and industrial partners to develop and explore more diverse crop options for greater carbon sequestration and reduced GHG emissions. FCT is supporting the project with its soil sampling aspect, co-ordinating with our project partners to examine soil carbon patterns underneath these crops and footprint the farms involved. 

Outside of these core activities, I get to participate with some of the great events we put on, including Soil Farmer of the Year, Carbon Farmer of the Year, our Field Days and our staff Away Days, all of which are fun and interesting. 

Exciting Future

Although there seems to be constant news stories about setbacks in environmental and human health, in the projects I work on for FCT I do feel like I can see the positive changes beginning to take shape more and more. There is a growing demand for a healthier lifestyle and the systems that support it as well as a more harmonious relationship with our environment and the creatures in it. One of the most satisfying aspects of my role, alongside the skills and experiences, is the fact that, in my small way, I hope I am playing my part in supporting this change. I feel very lucky to have that opportunity. 

A day in the life of… Grace Wardell, Calculator Development Officer

Posted on February 10, 2025 by - Insights, News

I’m Grace, one of FCT’s Calculator Development Officers. If you haven’t heard of FCT or our Farm Carbon Calculator, that job title probably means very little to you! So, let me explain what I do on a day to day basis to help maintain running one of the UK’s top 3 farm carbon calculators.

The Farm Carbon Calculator is just one branch of FCT’s work and is a tool within our online toolkit. Working within our Calculator team, my role is to ensure the Farm Carbon Calculator is based on rigorous science, remains up-to-date with standards and guidance, and is free of bugs that can sometimes appear when running a software.

To achieve these aims, I am regularly undertaking research, particularly if someone has requested an item on the Calculator, like a specific fertiliser or crop. I will find associated emissions factors, consult with experts in the field, alongside standards and guidance to ensure we are employing the recommended calculations.

Each year we undertake two major updates, one in April where we assess and update all emissions factors and one in October where we also look to improve the functionality of the Calculator. These are busy times for our team, where we work through and update thousands of line items on the Calculator to ensure we remain up-to-date with the latest science and data that’s available. All the while, I work alongside Lizzy Parker (Calculator Manager), James Pitman (Calculator Development Officer) and our software developers to keep the website running smoothly. 


Aside from my core work on the Calculator, one of the exciting things about working for FCT is the breadth of interesting projects we are involved in. I have undertaken farm modelling work for a few different projects looking to model the transition to more regenerative practices and the impacts that may have on greenhouse gas emissions. I regularly go to farming conferences to hear firsthand the issues that farmers are facing and can offer free advice on carbon footprinting their farm. I get to brush up on my science communication skills when posting blogs on our website on hot topics. I also get to enjoy our in person events such as our Annual Field Day, Soil Farmer of the Year and Carbon Farmer of the Year events, where we champion pioneers in sustainable farming.

Since we all work remotely and are spread far and wide across the UK, it is these in-person events and our Away Days that remind me how lucky I am to work with such passionate people who care immensely about our farmers, our environment and our food production systems.

A day in the life of… Calum Adams, Calculator Data Assistant

Posted on January 27, 2025 by - Insights, News

I’m Calum, the Calculator Data Assistant for the Farm Carbon Toolkit (FCT). I can imagine if you don’t work for FCT, you may not know who I am. I tend to work in the background, assisting the passionate and driven people who do great work in helping farmers to meet their low carbon and sustainability goals.


Day to day, my activities and tasks can vary widely, depending on the needs of the Calculator team as well as Izzy, our Data Scientist with whom I also work closely.

I primarily work with the Calculator team which can involve a variety of tasks. One of my main responsibilities is the rigorous testing of the Calculator after every update, and following the addition of new items to the calculator. Flagging errors and helping to resolve issues (if indeed there are any!) ensures a reliable tool and the efficient running of the calculator that farmers and landowners can use seamlessly. Another major part of my role is information-finding. Regularly, the Calculator team receives requests for additional products/items/data entries to be added to the calculator. Personally, I was surprised by how many crop protection products (insecticides/herbicides etc.) that are available to farmers, upwards of 30,000 different products available in the UK alone. So you can imagine, with changing trends and needs of farmers to protect their crops in various ways, we as a Calculator team need to keep up with adding additional products to the calculator.

Outwith helping the smooth running of the calculator, my responsibilities include assisting Izzy, our Data Scientist, with her work. Recently, I’ve been assisting her in updating and maintaining soil sampling datasets using QGIS (a spatial data software) that have been collected by the advisory team. I also assist Izzy by testing apps that she designed herself! One of which is a soil sampling app for use by the FCT Advisory team to record soil sampling points more efficiently. I’m particularly grateful for this piece of work as it takes me away from my desk and gets me walking around, albeit on the streets of Edinburgh rather than the fields.

My day to day can vary depending on the tasks that are required or whether I’m working out of my flat, a cafe or the Melting Pot, the co-working space I go to. I’m kept on my toes with the diversity of work to do. Through this type of work, it might seem easy to disassociate from the real-world challenges faced by farmers in a changing climate when you’re spending your days hidden behind a screen, focused on numbers and code. However, this is what I feel FCT does very well, in connecting us to the issues we are all helping to solve. Between the numbers and spreadsheets, we do well to have numerous meetings, whether it be online, hearing about the projects FCT are involved in such as Farm Net Zero, or in person days where we celebrate the farmers that are doing the most to demonstrate low-carbon, sustainable agriculture.

My first in-person day was last September at our annual field day, where FCT presented the Carbon Farmer of the Year. An opportunity to hear first-hand what farmers are implementing to produce our food in a sustainable and low-carbon manner with the help of our carbon calculator. I always come back from these days feeling invigorated to tackle the next challenge knowing that farmers are using the calculator to benefit their farms and the environment. 

Award-Winning Low Carbon Farming in Action: Lessons from Andrew and Claire Brewer

Posted on January 27, 2025 by - Carbon Farmer of the Year, Demo Farms, News

Written by Alex Bebbington, Project Officer, Rural Business School, Duchy College

In November 2024, a farm walk was hosted by Andrew and Claire Brewer, winners of the Carbon Farmers of the Year 2024, as well as being a Farm Net Zero Demo Farm.

The Farm Net Zero (FNZ) project was very proud of Demo Farmers Andrew and Claire Brewer of Ennis Barton for winning the 2024 Carbon Farmer of the Year competition. Carbon Farmer of the Year is run by the Farm Carbon Toolkit and is sponsored by HSBC Agriculture UK. It aims to support farmers on their transition to low-carbon farming by championing farmers who are successfully on that transition and creating a network to learn from.

On Friday 8th November 2024, Andrew Brewer hosted a farm walk to explain some of the practices that led to him winning this year’s Carbon Farmer of the Year competition.

Andrew and Claire farm 1,000 acres at Fraddon, near Newquay, milking 450 autumn-calving Jersey cross cows to supply Arla. Cows calve in late summer and are milked twice a day, sometimes in a 10 milkings in 7 days system. Land is let for field vegetables and potatoes as part of the rotation. Andrew is a Demo Farm for the Farm Net Zero project and carbon footprinting from this has shown that the farm is emitting 0.67kg CO₂e per kg of Fat and Protein Corrected Milk (FPCM). Andrew puts this down to maximising milk from forage, feeding little concentrate, and farming without any fertiliser on grass for the last four years. As well as working to reduce emissions, Andrew is optimising sequestration in hedges and soils.

Grazing management and herbal leys

The dairy herd grazes for as much of the year as possible, where conditions allow. Sometimes this may only be for a few hours a day, but Andrew feels this is an important part of his farming practices. Grass is the cheapest feed available and if the cows can harvest it themselves (aiming for 90% of the cow’s feed intake from grazed grass) then this not only reduces costs, but also reduces emissions from tractor diesel. Similarly, letting the cows out to pasture means that they can “spread their own slurry”, further reducing costs and emissions (both from diesel use and from slurry storage).

Herbal leys are used extensively across the grazing platform. Their deep, diverse roots help to improve soil health, potentially capturing carbon into the soil, and access minerals and nutrients deep in the soil profile, allowing for good growth without artificial fertiliser. The impact of the herbal ley on milk yield and quality is being assessed through a Farm Net Zero Field Lab, comparing cow performance on herbal leys and ryegrass/white clover swards. The results of this study will be available soon.

Calving

Cows calve outside in late summer, with the calves then reared in batches in a woodchip bedded shed. The woodchip creates a very clean environment, eliminating the need for bought-in straw. All calves are taken through to finish, with beef bulls kept entire and finished at 12 months and beef heifers finished at 17 months. Youngstock are grazed on a mix of pasture, cover crops and the leftover vegetable crops after the human-grade plants are harvested. This integration of farm enterprises helps to fully utilise nutrients across the farm, reducing the need for buying inputs in.

Soil health: the basis of the farm business

Andrew did a Nuffield Scholarship in 2015 and attributes this to changing his views on soil health as the basis of the farm business. Through the Farm Net Zero project, soil carbon has been monitored over a number of years and the carbon sequestered into these fields has halved the farm’s carbon footprint. Andrew acknowledged that the carbon sequestration is variable, with not all fields capturing carbon, but will continue to monitor soil carbon in the future to identify the long-term trends.

Farm trails

As part of the FNZ Demo Farm work, Dr Hannah Jones of Farm Carbon Toolkit has assisted in the development of a variety of soil-focused trials. When fields are let for vegetables and potatoes, the soil can require assistance back to optimum status. Trials to reduce the negative impacts of these practices have included intercropping between cabbages to reduce bare soil and the risk of runoff. Another trial has followed methods to restore soil health after potatoes. Different mixes were planted after potatoes to assess the improvements to soil structure, stability and worm content. Results from this suggested that Westerwolds ryegrass had the greatest positive impact on soil health, possibly because of its rapid growth creating a large root mass, so Andrew now grows Westerwolds following veg crops. This fits well with the dairy as the Westerwolds produces excellent feed for strip-grazing dry cows before calving, another example of how the whole farm system is integrated to minimise the need for emissions-intensive inputs.

In all, Andrew and Claire focus on running a simple system well, integrating enterprises across the farm. This allows them to minimise emissions from inputs, as well as maximising sequestration into soils and hedgerows.