“Had we still been ploughing now, we would’ve had two or three terrible seasons and lots of soil damage. The way I farm now has softened that blow. I wouldn’t want to be cultivating the land like we used to.”
Jayne Arnold is a grower who is really pushing the boundaries of soil health and management. Based on a 12-acre organic vegetable farm in Worcestershire, she is constantly striving to find ways to improve the diversity, depth, quality and carbon content of their soils. Growing for their own veg box scheme, the farm also has a few sheep, an orchard, agroforestry and makes plenty of compost.
In this new Case Study, we learn how Oxton Organics is balancing a productive farm, producing local food, whilst constantly improving soil health and quality through a voracious appetite for knowledge and an approach.
Whilst the farm has been organic for a long time, it’s only in the last 7-8 years that this new approach to soil management started, producing some really impressive results. The approach is underpinned by applying high quality compost, biostimulants, and covering the soil as much as possible through mulches, compost and green manures.
The sheep play an important role, and the pastures they’re on have improved significantly since the species mix and stocking regime has changed. This has resulted in not just better pastures and better soil helath, but much more biodiversity too, as Jayne notes:
“In the years after sowing the pasture, it was predominantly grasses, white clover, and yarrow, with a little ribwort, burnet and yellow trefoil. Now there is much more diversity, there are flowers throughout summer and autumn, including dandelions, wild carrot, yarrow, knapweed, oxeye daisy and much more. A few bee orchids and pyramidal orchid appeared four years ago and returned every year since. We had never seen orchids on the farm before! Butterflies and other pollinating insects are also more abundant.”
Biodiverse pastures at Oxton Organics
Wildlife abounds above and below ground, from the tall hedges and lines of willow coppice to the flowers of the pastures and the cropland soil teeming with life. “There are so many worms in the soil, it’s hard to avoid them when transplanting crops!” Jayne says.
Soil Organic Matter levels are rising and distributed more evenly through the soil profile. Structure is improving, soil colouration is more even and deeper through the profile. The action of worms and perennial plants helps to draw carbon down in the soil profile – and that means it is also more stable. Carbon sequestered into the soil like this is a proper drawdown of atmospheric carbon; if it’s not released then it is stable and locked away.
An example of a deep rooting and diverse green manure mix, in one of the polytunnels
Jayne notes that weather patterns have changed, with more frequent extreme rainfall events. “The up and downness of the weather has changed a lot“, she says. Building resilience in the stability of farm soils is essential in helping to mitigate such risks that all growers are experiencing from a changing climate. Soils that are higher in carbon, have a mulch or living cover, and have better structure will be much more resilient to the effects of both heavy rain and drought.
The farm’s focus on soil management underpins all the positive aspects outputs of the farm – quality food, flood resilience, carbon sequestration, biodiversity, and indeed sheer enjoyment and intrigue that gets growers out of bed in the morning. A refreshing look at green manures, founded on experience and observation, demonstrates one example of this: “you won’t build a fungal dominant soil with legumes. Plants will reject mycorrhizal associations if there’s too much Nitrogen in the system. You need to build bacteria that naturally fix Nitrogen and be more balanced. You don’t see many legumes in the hedgerow – yet that’s all green” says Jayne.
Mycorrhizal fungi associating with a radish
Managing carbon is also part of the business strategy, using an electric van for deliveries, minimising any cultivations, ensuring lots of carbon sequestration, and reducing inputs. With so much carbon being absorbed on the farm and being turned into soil organic matter, the farm is really demonstrating how to grow in a way that builds capital for the future, whilst producing great quality food and continuing to explore and push the boundaries.
Sheep grazing in the pastures at Oxton Organics
With thanks to Jayne Arnold for the photos and the interview. Written by Jonathan Smith.
At Tregooden Farm in Cornwall, farmers Malcolm and Catherine Barrett are pioneering ways to take their farm to net zero carbon and beyond. With a 150 strong beef herd on 300 acres, the couple have transformed the way they farm by focussing on soil health, biodiversity and animal health.
Catherine and Malcolm Barrett
On this Duchy of Conrwall farm, the livestock graze on the pastures, but are also fed on maize. The maize is being farmed in a very different way to how they used to work in an intensive dairy system. Across the farm, the huge drop in artifical fertiliser use (by 60% over 4 years) has had significant cost and carbon benefits. Malcolm said:
“We went quicker than we might have done, but it seems to have worked. No yield deficits are showing yet! I want to move to a point where we’re not applying artificial fertiliser, relying on biological foliar feeds.”
By adding green waste compost and manure at rates of just a few tonnes per acre, they concentrate on feeding the soil biology to stimulate improved soil health and carbon sequestration. As Malcolm says “We’re farming livestock both above ground and below”.
Maize growing at Tregooden under the low fertiliser approach
Fuel use has fallen to just nine litres per hectare, due to the cultivations changing to a system based on discing and a direct drill. “We used to beat the living daylight out the soil – there’s no need to do that now” says Malcolm. In addition, he realises the changes are spreading through the community: “Our son is 20 and works for a local contractor. Last spring he asked – ‘why do they work the fields so much?’ It was a lightbulb moment!”
Grazing has changed substantially by grazing more instensively over shorter periods. There are 80 acres of green manures including Westerwolds, rape, stubble turnips, black oats, crimson clover, winter vetch, beans, designed by FCT’s Hannah Jones.
Green manure mix on the farm
Biodiveristy is improving below ground, with good dung beetle and earthworm activity obvious, and soil sampling showing that Soil Organic Matter is rising across the farm – which means carbon is being sequestered. Above ground tree planting, hedge management, wetlands and improved pastures have led to noticeable improvements in bird and insect populations.
Wetland, and mature trees – great for biodiversity and sequestering carbon.
The Barretts are enjoying showing people around the farm, and are invlovled with Farm Net Zero, Innovative Farmers and the Duchy of Cornwall. They want to inspire change in others – farmers, agronomists, community, researchers and more.
Looking forward, Malcolm said “I’m excited about the future, we’re working with soil and nature again.”
It’s clear this farm is a really embracing the change towards net zero, and coming up with an innovative approach to farming. The farm and farmers are demonstrating tangible environmental and social improvements, an inspiration to others.
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.
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.
Among the many threats posed by climate change, maybe the greatest is to our food systems. With our country producing less than 60% of what we eat, and the climate crisis already having a huge impact on many of the places we import our food from, the UK clearly needs to become more self-sufficient.
But increasingly extreme weather is affecting food production right here too. Following last winter’s endless rains, British farmers have had one of their worst harvests ever. We know that the way our land is farmed and managed can help us to mitigate the impacts of the climate crisis… or indeed to make things much worse.
However, with farmers facing unprecedented financial challenges and record numbers now fearing they’ll go out of business, can we realistically expect them to protect us all from climate change too?
Farming and land use are also increasingly becoming a lightning rod in the climate culture wars. Half-truths, misinformation and outright lies are being pushed across social media by those with a vested interest in crushing the whole green agenda.
While filming the Cornwall’s Climate Stories documentaries, we’ve been keen to find out whether all of this is impacting real world efforts to boost pro-climate and nature-friendly farming.
Farmers centre stage, with a supporting role by FCT!
As filmmakers without a personal connection to farming, it’s been fascinating for us to interview so many farmers and food producers across Cornwall (and our film Food for Thought was actually presented by an organic beef farmer).
We’ve also featured several members of the Farm Carbon Toolkit (FCT) team, including technical director Becky Willson, who we met in the middle of the 2022 drought.
Becky demonstrating the properties and health of soil
Becky took us out in a Cornish field to show us the huge differences that regenerative farming can make to both farmers and wider society. Biologically-healthy soils are not only more fertile, but also store more carbon, support more wildlife, and hold much more water – reducing flash flooding during our increasingly torrential downpours, but also enabling crops to keep growing during increasing periods of drought.
Another of our interviewees was FCT Impact Manager Jonathan Smith, who is trying to adapt to increasing coastal erosion as the sea level rises around his beautiful organic farm on St Martin’s in the Isles of Scilly.
Meanwhile, Farm Carbon & Soil Advisor Anthony Ellis appeared in our film Power to the People about climate change and energy, addressing one of the biggest flashpoints around climate action in rural areas – solar farms.
The loud public outcry against the idea of solar panels covering productive farmland has been unavoidable. However, Anthony believes we’re missing a trick by viewing land use in such a binary way.
He has raised his panels up 18 inches higher than usual to allow his sheep to graze beneath them. Aside from bringing him in additional income, the panels also improve the welfare of his animals.
When we visited on a very hot summer’s day, the sheep were relaxing in the shade of the panels and Anthony explained the grass holds on better beneath them during droughts than it does out in the open. Chickens can be kept beneath solar panels and all manner of veg grown between them too.
Anthony’s sheep under solar panels on a warm day
Few will argue that solar farms are beautiful – but the popular view of these sites as sterile and lifeless can be far from the truth. Recent studies have found well-managed solar farms act as vital havens for wildflowers and critical pollinators among barren landscapes of industrial farmland.
Bringing nuance into the debate
Concern over food security is totally understandable. However, even if all the solar area envisioned in the government’s net zero plans were built, this would still take up only 0.3% of our land area – just half the amount of land taken up by golf courses (and 0.5% of the land currently used for farming).
Solar farms are far from the only controversial way of using farmland to tackle the climate crisis though. Tree-planting initiatives are also leading to fears of food-growing areas being lost.
However, the picture is more nuanced here too. Agroforestry is a great way of introducing more trees into the landscape, while still using it for farming.
Chris Jones, who farms near Ladock, has planted strips of willow through some fields, allowing him to mob graze his livestock (regularly moving animals on from one small area of land to another, which is a great way of boosting soil biology and carbon storage).
Mob grazed cattle
Planting more trees across a farm, or allowing hedgerows to grow out, not only benefits birds, pollinators and other wildlife. This can also provide shade and shelter, important for livestock as our weather becomes more extreme, as well as additional fodder. Trees can also be coppiced to provide firewood or fencing materials, or could provide additional crops such as fruit or nuts.
Tree planting is often linked to something else that has spawned huge controversy – rewilding. Yet several farmers across Cornwall are involved in this to different degrees too, re-introducing extinct or struggling species from tiny harvest mice or water voles to larger and much more misunderstood ones, like beavers.
There’s alarm in some quarters about beavers eating fish (they’re vegetarian) or killing trees (most of the trees they fell regenerate). Concern about flooding of farmland may be more of a possibility. However, experience in countries like Germany, where beavers were reintroduced over 60 years ago, has shown these animals can be managed and relocated quite easily if problems arise.
In terms of benefits, beavers’ leaky dams help to clean up rivers and drastically reduce flash flooding, while the ponds behind them have been proven to kickstart an amazing return of other life, from insects and fish to bats and birds. Importantly for farmers in our changing climate, they can also provide a valuable reserve of water for potential use in times of drought.
Turning challenges to opportunities
We’ve met so many Cornish farmers who are grasping the climate challenge with great enthusiasm – from the Stoke Climsland cluster of small farmers working together to create wildlife corridors across their wider landscape, to huge businesses like Riviera Produce, which farms 8,000 acres across Cornwall, producing a significant amount of the UK’s cauliflowers, cabbage, courgettes and kale.
Riviera farm manager David Thomas looking at soil quality in a field of green manure
By adopting more techniques such as companion planting to encourage natural pest predators, Riviera have managed to massively reduce the amounts of pesticides and other chemicals they use. Worm counts in their soils have boomed, and by using cover crops after harvest instead of leaving bare earth there’s now far less run-off from their fields to cause flooding in nearby villages.
But…. there is one big elephant in the room around farming and climate action in Cornwall. Just a cursory glance shows that most of our farmland is dedicated to livestock – and the climate impact globally of the meat and dairy industry is huge.
Livestock farming may be a traditional part of Cornwall’s heritage and it’s true that we grow grass here very well. However, many animals today actually live in highly intensive systems dependent on imported feed and chemicals, with their waste contained in vast slurry lagoons that pump out planet-heating methane.
Innovative Cornish research is attempting to tackle these impacts – for example by capturing methane and turning it into a green fuel, or researching new feeds to replace damaging Amazonian soya.
These advances are important given that these mass-produced animal products are sadly much more affordable than milk or meat from higher welfare and more nature-friendly, pasture-fed animals.
However, it’s also important to recognise that nearly 10% of the UK population is now either vegetarian or vegan. Could this offer new diversification opportunities for Cornish farmers too?
We already have more Community Supported Agriculture (CSA) schemes, growing veg to organic principles, than anywhere else in the country – but there is potential for much more horticulture here too. A changing climate may increasingly also enable us to farm more and different crops, such as sweet potatoes, soya and grapes.
Holly Whitelaw testing (and tasting?!) soil at Boasvern CSA in West Cornwall
At least one Cornish livestock farmer is even considering growing oats to tap into the vegan oat milk market too!
Farmers have always been great at adapting to whatever is thrown at them – be that weather, government policies or changing public tastes.
However, as climate impacts worsen, adaptability is going to become key to their survival. We all depend on farmers three times a day, so supporting them in this changing world should be a priority for all of us too.
We’ve seen some tantalising glimpses all over Cornwall of many ways in which farming could become more resilient and much better for nature, people and the climate.
Making this a meaningful reality is clearly going to need much greater support from the government. However, we hope that, by showcasing the stories of so many passionate food producers around Cornwall, our films can help to enthuse more of the farming community to get on board with becoming part of the climate solution too.
Bucksum, based in Buckinghamshire, produces over 40 varieties of salads, herbs, fruits and vegetables in their market garden. As 2024 winners of the Soil Farmer of the Year competition, David and Tracy operate with huge attention to detail, focusing on rotation and maximising soil health and functionality to provide nutritious, high-quality produce whilst enhancing the biodiversity of their landscape.
The business operates from 16 acres of rented land, with approximately 4 acres cropped each year. Through integrating herbal leys, homemade soil improvers and a four-year rotation David and Tracy have created a thriving food business with resilient soil at its heart, able to supply their farm shop and beyond.
Written by Becky Willson, Business Development & Technical Director
On a sunny day in September, farmers gathered at Rotmell Farm to take part in a farm walk with our Soil Farmer of the Year Winner from 2020. Thanks to funding from the AFN+ network, we have been able to revisit two farms this year to understand how their farm and management system has evolved since being awarded.
Rotmell Farm is 1000 ha, 800ha of which is unimproved pasture – encompassing heather, bracken and wet areas. The farm sits in the middle of the Tay Valley, and watching how water was moving through the landscape formed a key part of the decision to adapt the management of the farm to focus on soil health and water holding capacity. In order to achieve this the grazing management system was adapted in 2015/6 to include subdividing paddocks and starting to move stock. Since this time the farm has continued to evolve its management style until now where the primary driver for the farm is to use the stock to maximise carbon and nutrient cycling across the farm.
Alex explained:
I had thought that the moment that we started putting in fencing, subdividing, moving stock and going into taller covers and rotational grazing that we could balance saturations of key nutrients and achieve a system where no inputs were required. We’ve built organic matter and are growing pasture, but the system needs to be continuously managed and adapted to try and achieve that balance. I now regard grazing as an art form.
The event started with a session in the barn to understand the evolution of the system and the key principles that the farm uses to drive performance. A key driver over the last couple of years for Alex has been understanding total nutrition and the ability to balance nutrients to enable optimal soil and biological health. This has involved implementing in depth soil analysis to understand the balance of key nutrients within the soil and intensive observation of plant and animal performance to start to understand how they are working together. This has included a focus on calcium as the driver for improving structure, oxygen levels in the soil, grass production and carbon cycling.
The whole farm is set up for total nutrition. We are trying to get the biology working to grow high Brix grazing grass to feed to stock, to sell nutrient dense meats and other products into the local market.
The farm sells honey, eggs, and beef locally where the ability to connect the farm with the produce is valuable and helps to cement the farm as part of the local community and allowing them to identify with the produce and where it comes from.
Alex has adapted his grazing system to encourage more diversity in the leys and to graze taller residuals. He sees far greater value in the hoof impact through trampling than the grazing; when the animals are put into taller covers, they graze the plants higher up and don’t graze the base of the plant, which leads to the carbon rich material being returned to the soil, cycling that carbon to feed the biology. The intensiveness of movement of the stock helps to get the carbon back down into the soil. The tightness of grazing takes away selection of grass.
The first field that we went to see has been used as an experimental field to look at species mixes. Alex researched different grass mixes and has returned to a mix that was common in the 1880s which can be used to improve poorer land. The field had been forage rape previously with lambs grazing the aftermath. The field was then disced and the new ley was broadcast, rolled in and then left. It has just had its third grazing, having been grazed with sheep 8 weeks after sowing to encourage it to tiller in late July. It was then grazed with a mob of about 65-70 cattle to break the parasite window and then had a group of 200 ewes with twin lambs. Every time seeds are sown they are mixed with vermicast, humates and fine lime which encourages biological activity around the seeds and ensures the seed has everything it needs to get going.
Alex really sees the importance of a high seed rate which allows for a thick and vigorous sward but also helps to maximise the value of trampling. He is aiming for 285 plants per m2 and has seen this work well higher up the farm where it is increasing the density of grass and reducing coverage of moss.
The animals have adapted well to the changing system. All the stock are out all year round, there is no housing. Bales are put out for the winter, with the aim being to set up blocks to shift the cattle every two to three days on a self feed basis. The type of cow has changed as the system has evolved; the animals that cope better in this system are slightly smaller framed and carry flesh. The cows need to be at 350kg at 15 months in order to allow them to calve at 2 years old at around 450kg in the middle of April outside. Cattle are weighed and recorded regularly to monitor live weight gain and body condition and FEC tested every 90-100 days to monitor worm burdens. The sheep are also weighed regularly to provide insight into which animals and genetics are coping with the system. The sheep are supplemented with rock salt and minerals depending on the pasture and soil analysis.
It wouldn’t be a soil farmer walk without a group of farmers standing over a soil pit and looking at the impact of the management changes on the soil. Alex has seen changes in soil health, since making the early transition to rotational grazing, however over the last couple of years has been focussing on enabling the biology to thrive and optimising nutrient cycling and the interaction between the soil and the plant roots. As such, two key assessment methods have been useful to show progress which have been the penetrometer and Brix assessments.
I started to get really excited about Brix readings a few years ago, and then really clocked onto it last year. I realised that the taller the plant got the Brix reading grew and grew, we started with 3’s and 4’s, as the covers got to boot stage readings got to 9’s and 10’s which was really exciting. This year, the penetrometer has been a useful tool, the pressure readings had been 250’s and 300 PSI and now we are down to 150, and I think that once we have psi’s of 150 then we are getting oxygen into the soil. We can send soil off to the lab for analysis, but how the soil is structured is a reflection of our management.
If we find fields that are compacted, I’ll skip them and give them 120 days rest rather than 60 days. We have stopped treating the whole farm as one block and looked at what the field needs and how we can optimise root architecture and plant diversity. Its important to us that every grazing experience is positive. We want to get to the point where we don’t need to apply anything, although we aren’t there yet. I’m not totally against applying anything, we need energy in the system and if the soils are tight, then we aren’t at optimal soil function, but the aim is to get to the point where we can target nutrition based on soil and plant need
Due to the nature of the farm and that 85% of the farm is hill areas, a key challenge for Alex has been to manage these areas in a way which can control the bracken ingress. He has been managing these areas in order to build capacity higher up, so that the in bye ground can be managed in a way to provide longer recovery periods.
If I don’t keep enough stock to get on top of the bracken, I will lose the whole farm to it. We only have 8-10 weeks to influence on that plant when it is above the ground, the other part of the year it is below the ground. We have implemented a grazing system which is intensively extensive, really hard hitting when we are there – in the summertime we are moving cattle 4 times per day, but then really long recovery periods. Which allows us to knock the top cover of the plant back but not doing enough to impact the biology and chemistry of the plant – which is why we have just brought pigs onto the farm.
Where this has been implemented, the results have been remarkable. Where the bracken has been managed in this way, the pasture regrowth has been diverse – clovers, vetches and grasses alongside yarrow and red clover are now starting to emerge due to the management system. Although bracken in a challenge, Alex also sees the benefits of it when it is controlled as it is mobilising a lot of potassium around the system which can then be used to support the pasture regrowth. The management of these areas is crucial, where extensive management is leading to the development of these bracken areas,
The base geology between our unimproved and improved land is exactly the same, so the potential to increase output on that land is vast. The more I think about it, the more I think that soils don’t want to be extensively managed, they want to be intensively managed with long recovery periods. We produce a lot of disturbance and then get off it to let it recover.
The group then went to look at the pigs, the new tool in the bracken control strategy! The aim with the pigs is that their rooting activity will help to chew the roots of the bracken up and add manure to aid nutrient cycling. Following the pigs activity the area will then have seed broadcast to increase forage production. The pigs will also be moved into higher areas to help with the bracken control.
The final stop on the walk was at some slightly higher country. The field had been soil sampled and the results had shown good levels of organic matter but suppressed levels of biological activity. As such, Alex is conducting some trials looking at the efficacy of spreading fine lime as a way to improve the calcium content of the soil and enhance the biological activity. Analysis shows that there is most compaction on the farm in the in bye fields, higher up there is less compaction but lower pH’s and less biological activity; as such if we can grow more feed higher up then less forage is required. The farm is using half as much feed as they used to since transitioning to the system. The grass used to be very thatch dominated but there is now an increase in clovers and plantains starting to appear.
Alex explained his change in thinking to manage for what you want rather than what you want to control.
I was so transfixed about managing bracken, I forgot to manage the grass. So by managing the grass, I build the quality nutrition and manage the soils to get the system working, then the pastoral density comes and will deal with the bracken.
To finish the walk questions turned to what next? Alex has spent the last 6 years gathering data, digging holes and persisting to pull it all together. So for the future, he thinks that the big changes have been done, its more about being observational and tweaking the system to optimise biology.
Grass is the most undervalued crop and so we are starting to put it in through the introduction of the new leys. We aren’t carrying more livestock but we are spending a lot less money. Its taken me 10 years to understand how to manage this ground. The failures have been too high- to learn about this we have to get some of it wrong, I’ve never had a year yet where we have got everything right but that is how we learn. Now its time to deliver what we know will work and to drive that system we need nutrition. We’ve been funded to experiment and now the system has to deliver.
Our sincere thanks to the Alex and the team at Rotmell for a fascinating afternoon that gave everyone plenty to think about.
Ben Richards has been awarded Third Place in the 2024 Soil Farmer of the Year competition. This case study gives an overview of how Ben has built his system around resilient soils to provide the forage and nutrition his herd. If you would like to visit Ben’s farm, a farm walk taking place on 12 September 2024: click here to book your place.
Middle Trelan Farm is a 290-acre dairy farm in Cornwall, milking 180 to 200 cows, depending on the time of year. The farm has been certified organic since 2020, with the cows being 100% grass-fed, milked once a day, calved in spring from the 10th March and outwintered to reduce costs.
Soil management has been a key focus on the farm for over 20 years, and Ben shares that making more money has consistently been a key driver in the steps taken to improve soil health and reduce inputs.
Early noughties – addressing nutrient imbalances and surface compaction
As a wet farm with heavy clay soil, an early challenge in soil management was to alleviate surface compaction, which was achieved using slit aeration.
Ben also took advice from Straight Line Nutrition, using recommended fertilisers to resolve nutrient imbalances in the soil.
2010s – phasing out chemicals and introducing herbal leys
Weaning off chemicals has been a gradual process at Middle Trelan Farm. In 2012, the decision was made to start gradually weaning off the high use of nitrogen fertiliser. Now, Ben focuses entirely on feeding the soil, not the plants, which he does by applying 2.5 tonnes/acre composted farmyard manure per year.
Having switched from blanket spraying to spot spraying broadleaf weeds in 2005, spraying was stopped altogether in 2016. It took four to five years to increase dock beetle numbers to the point where they were controlling docks. Now, with the overall reduction in chemical use, the docks have become more palatable, so what the dock beetles do not eat the cows will eat anyway.
Ben also started growing herbal leys in 2016, selecting species to benefit the soil, as well as those which will benefit the cows. This includes choosing deep-rooting species to improve the soil structure and enable water to permeate into the soil. Seed companies warned that cows would not eat some of the plants, such as sweet yellow blossom clover, but in practice, Ben has found that as the soil has improved and plants become more palatable as a result, the cows will eat all species. He has not included any ryegrass in the mix for over five years, with the exception of during Covid when the seed companies were not able to source an alternative.
For reseeding herbal leys, cows are now grazed on the area to be reseeded over winter, followed by pigs. The pigs turn over the soil and root around, preparing the ground for establishing a herbal ley in the spring.
The cows have benefitted from the move away from chemicals and the introduction of herbal leys, as they can self-medicate by selecting the nutrition they need. The evidence for this is clear, as Ben has not needed to treat the cows with any medications for eight years, although he does still give the calves an anthelmintic for lungworm.
The phasing out of chemical inputs, from broadleaf herbicides to veterinary medicines has reduced costs and therefore improved farm profitability.
2020s – moving from a bacterial soil to a fungal soil
Ben shares that it was 2021 to 2022 when the farm turned around – it had reached the point where it had a fully functioning bacterial soil. The focus has now shifted to move to a fungal-dominated soil, as with fungal mycorrhizal structures present plants can cooperate, warning each other of dangers and contributing to the overall health of the farm ecosystem.
The presence of deep-rooting plants will facilitate the transition to a fungal soil, so Ben has embarked on an agroforestry project, which is funded by Forest for Cornwall. The project began in 2023 to 2024, when 6,500 trees were planted in 1.5m rows (3 trees across 1.5m), with 12m between rows, which should be close enough for the fungal mycorrhizal structures to reach each other. Grazing trees were selected, including different varieties of willow, poplar and aspen.
The wettest fields were chosen for tree planting, with the intention that the trees will also help drain the fields, getting rid of surface water. Herbal leys have been planted between the tree rows, so in year two the trees will be grazed together with the herbal leys.
Another 4,000 trees will be planted this winter. In year three, Ben intends to stop planting and wait to see the impact during a full grazing season, then if it is working as expected he can take cuttings from the existing trees and roll out the system across the whole farm.
Ben explains that the overall goal of the agroforestry is to maximise dry matter production on-farm to feed the cows, while the trees will also help drain the fields, promote fungal activity in the soil, secure a reliable forage supply throughout the summer and also provide nutritional benefits to the cows eating them. In short, the trees should ‘tick all the boxes’ for farm resilience now and in the future.
To conclude, Ben shares that he has found it to be true that ‘less is more’. The less interfering he has to do with the cows, the better their life is, and the better his is too.
Written by Tilly Kimble-Wilde, Farm Carbon and Soil Advisor
Richard Anthony, of R & L Anthony near Bridgend, was awarded Second Place in the 2023 Soil Farmer of the Year competition. He was commended on how he responded to and managed challenges, never veering from thinking holistically, always upholding soil health as a priority, and treating each challenge as something from which to learn.
A majority arable business, Richard farms a 6-year rotation of wheat, maize, oilseed rape and westerwolds intermixed with a diverse array of cover and companion crops which he is passionate about. “The emphasis on farm is the soil, improving the soil and organic matter, and keeping a crop in the ground; keeping the soil biology alive.”
Richard and the team also strive to promote and create habitats for wildlife: planting wild bird seed mixes, establishing wildlife corridors, and bordering all hedgerows with a 3m margin to encourage growth year on year. 2m flower margins have also been implemented around all fields of oilseed rape which has been, to quote, “absolutely fantastic.” Encouraging insects and bees and getting the public on side too.
The farm walk itself took place on 23rd November 2023 and kicked off with a presentation taking us through the past year and outlining the various activities and obstacles the farm faced. We were then treated to a fantastic farm walk whereby Richard gave our group of visiting farmers, agronomists, and advisors a tour of some of what they get up to across their extensive arable and forage business.
A big part of what Richard and his team are trying to achieve across the farming business is to use very little bagged fertiliser. Most of the nutrients applied to the soil come from digestate, conveniently stored in the farm’s digestate lagoon. Tankers come in and fill alligator bags for easy transport and the digestate is spread on wheat, oilseed rape and maize.
So far, Richard has managed to eradicate artificial fertiliser when growing maize and OSR; however, wheat still receives a small amount of early application. This wouldn’t have been possible without the construction of the digestate lagoon, a project which was undertaken at the beginning of last year. Still, as Richard says, there is room for improvement. The farm is looking to reduce its N inputs even further by trialling an N inhibitor, all to build more resilience into the system.
This mindset has been applied to fungicides. To use less, Richard has changed the sprayer to accommodate the wet and windy weather brought in from the coast. Now at 250cm spacing, the booms can run very low resulting in no drift even if it’s windy. This enables more spray days and a better chance at getting the timeliness right.
As with most farms across the UK, the weather has been the biggest challenge with dry weather in May and June, and then rain as soon as harvest began.
Luckily, Richard had installed a biomass boiler 6-7 years ago for grain drying after a very wet harvest having heard about them in Scotland. It has been a game changer. Their 1-megawatt biomass boiler provides a lot more spare heat than previous methods of grain drying where they used up to 1.2 megawatts of gas on one drying floor. In the old system, if they were on 25% moisture, it took 10 days to dry one side. With the biomass boiler on woodchip, they can dry 2 drying bays, double the output, and never have to run the boiler flat out. With the right combine (Richard uses a MacDon belt header), the corn is cut as soon as it gets to 25% and achieves good output, as Richard emphasises “do not wait”.
Planting OSR in August was a struggle, with some fields too wet to put a tine in and any cultivation out of the question. Instead, Richard planted the wet parts of the field by snipping the OSR with a sprinter drill and planting the dry parts with a farm standard drill and a top down.
To better manage the unpredictable weather, Richard has a selection of drills that he’s held onto rather than sell. The farm will run 2, sometimes 3 drills if they can, capitalising on days when they have the right weather. This was especially helpful during autumn when the farm received 295mm of rain in October alone.
The farm also spends a lot of time on drainage. Ditches are cleaned, dug out, drains put in; all with the aim of evening out patches in fields and making the farm more resilient. As Richard says, it’s great getting 16t/ha on wheat in a bit of field but if you’re only getting 3t/ha in another part because it’s too wet there is space to do better.
Still, the most used bit of kit on the farm is a spade. By continually monitoring and assessing soil structure, Richard can make a well-informed decision when determining how to establish the next crop.
Farm Walk
During the farm walk, we were shown multiple cover crop and companion crop trials that were taking place on the farm. Steve Corbett from Agrii has worked with Richard for many years, trialling different varieties and combinations, highlighting the importance in being selective. You need good establishment, and it must earn its keep.
What they have found is that OSR, a “lazy rooting brassica”, completely lends itself to companion cropping, in this case with beans, spring vetch and buckwheat. Beans help to get the roots down as well as provide free nitrogen through nodulation. Spring vetch as opposed to winter vetch grows quickly providing biomass and N fixation. Buckwheat adds to the canopy, slowing down flea beetle, making it more difficult for pigeons to land, as well as mining phosphates. When the companion crops die, all the fixed nitrogen and phosphates will be released back into the soil ready for the next crop.
Richard deliberately plants OSR at low seed rates to encourage big branchy plants in spring which will grow away, allowing light through the canopy. By choosing thicker and well-branched OSR types, flea beetle is more contained, damaging only the outer leaves, leaving the middle to branch out. In Richard’s experience it provides a plant that will survive despite a pest living within it.
In terms of cultivation, Richard is a big fan of direct drilling. When direct drilling wheat, he believes it is important to see what is happening underground: what is the root depth? Taking stock of root depth and maintaining that attention to detail during crop growth is essential to determine the next steps in terms of cultivation. At Sealands farm, root depth is critical to survive the winds, Richard has found through monitoring that cultivation disrupts root growth, and that direct drilling fits his system best.
Ultimately, Richard has tried a lot which didn’t work out, but he’s kept at it. One outcome which has surprised him the most was the success of forage rye which he believes is underestimated. In the field, Richard showed us the root mass it was building and the excellent soil structure it yielded. This has provided Richard with an extra income stream, either taken for silage or grazed (ensuring to move stock on in wet conditions to avoid undoing all the good work he’s built up!).
Looking to improve the soil structure even further, Richard planted the forage rye together with westerwolds. He found that they were able to harvest the westerwolds a fortnight earlier due to the ability of the forage rye to get away in the spring creating its own microclimate which Richard believes benefitted the westerwolds.
Finally, we heard about Richard’s problem with persistent perennial ryegrass. In this instance, he introduced an annual ryegrass to outcompete the perennial. “Putting in a bully to outcompete a bully”. It worked and Richard is now able to include it within the arable rotation without generating a loss. This allows a rest period within the rotation to build fertility, stabilise soil structure and generate a bit of extra cash from silage or grazing. Essentially, Richard is maintaining the balance of farming resiliently: optimising soil health and crop yields while sustaining a viable business.
As we’ve all come to realise, we can’t rely on the weather, however, prioritising soil health as perfectly exemplified by Richard, can better equip us to respond and adapt. When we get to know our soils, monitoring how they behave in certain conditions and how they respond to our actions, we are better prepared and forearmed to make decisions that will affect future harvests and pocket.
Through trials and problem solving, Richard together with Steve have implemented more diversity and reduced inputs without damaging profits. A big resistance to straying from our well-known and “safe” rotations is often down to “how will it pay for itself”. Richard and Steve have shown that they’re not radical in their rationale for cover and companion crops, the bottom line is it has to pay. The most exciting take home from the day is they didn’t give up: they’ve found the right species to incorporate, the soil health on farm is improving and crop yields are directly benefiting. It was a truly inspiring day and a masterclass in perseverance. Richard hasn’t made it look easy by any stretch but as he puts it “we’re just learning all the time.”
We’re excited to share a series of five new videos that showcase some of the farms in Cornwall that are part of the Farm Net Zero project.
Each video shares a different farm’s journey as it works to improve the environment, produce nutritious food, while also responding to climate risks, such as flooding. There is a specific focus in these videos on how the farms are engaging within their local communities, to help tackle these issues. The Farm Net Zero project includes practical advice for farmers on how to reduce greenhouse gas emissions, showcases innovation, provides robust science through soil testing and carbon footprinting, and inspires other farmers to tell their stories to consumers on the steps that they are taking to address climate change and protect soil health.
The full-length video below includes all of the following five stories. If you prefer to view each story separately, please simply click on each of the links here:
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