Farming
How improving soil health will reduce farmland weed burdens
BALANCING soil nutrient levels by applying calcium to farmland could help farmers reduce weed populations and their synthetic fertiliser and chemical use.
In common with many farmers, lamb and egg producers Ben Anthony and Diana Fairclough face a perpetual battle to control thistles, docks, nettles and other common weeds on their 73-hectare farm in Carmarthenshire.
When they recently hosted a Farming Connect event led by agronomist Daniel Lievesley, he suggested that an incorrect balance of soil nutrients could be a reason for those annual weed burdens at Frowen Farm, Login, where lamb is produced from 370 breeding ewes, and eggs from free range hens.
Getting soil analysed should be a first step to addressing weed issues, advised Daniel from DJL Agriculture.
Weeds are not only problems to be dealt with but indicators of issues in soil balance, he pointed out.
“Weeds establish where there’s a nutrient deficiency. For example, docks mine for calcium, so if you address the calcium deficiency, you take away the very reason for the docks to be there.
“You will often find that the forage that grows around a weed is high in nutrients because the weed tap roots draw up minerals from deep in the soil to feed it.”
Daniel warned farmers against focusing solely on chemicals to control weeds, recommending that they address the nutritional function in their soils.
At Frowen, for example, soil sampling shows that the clay soils have a high iron content, locking up phosphorous and zinc.
Introducing air into the soil with aeration is a means of addressing this, but so too is rectifying the mineral imbalances.
Common farmland weeds like nettles, chickweed and fat hen are indicators of high nitrates, for example, while low calcium levels encourage docks and thistles.
When calcium levels are low, Daniel advocates applying gypsum as a means of changing cations in the soil, supplying calcium to replace some of the magnesium bound by soil particles, particularly in clay soils.
The calcium:magnesium ratio on a soil analysis report should ideally sit at around 8:1; any less and the calcium deficiency needs to be addressed to prevent weeds taking hold.
“Mined gypsum is a wonderful way to apply calcium sulphate to release the magnesium into the soil,” said Daniel.
Gypsum is best applied when there is rain in the weather forecast.
Daniel specifies use of naturally-mined gypsum, not reclaimed plasterboard which contains resins, glues, and heavy metals which present issues for livestock.
At current prices, gypsum comes at a cost of £20–£32/tonne, depending on a farm’s proximity to a quarry, and a further £5–£10/acre spreading charge.
Calcium is closely linked with mycorrhizal fungi soil interactions too, which again keeps weeds at bay.
Integrating trees into agricultural systems can also reduce weed burdens.
They do this by creating shade to deprive weeds of light, by competing for resources in the soil, and through the weed-suppressing mulch effect of leaf litter.
Farming Connect’s Forestry Specialist, Geraint Jones, a speaker at the event, explained that trees improved soil health, keeping weeds at bay, and that they establish physical barriers against the spreading of weed seeds.
Tree and hedgerow root systems draw nutrients from deeper soil layers and these are circulated within the ecosystem, contributing to overall soil health and significantly adding to the soil’s carbon content through storing carbon in roots and the decomposition of root biomass and leaf litter.
“Many tree species form symbiotic relationships with mycorrhizal fungi in the soil,” Geraint told farmers.
“These fungi extend the reach of the tree’s root system, significantly increasing the surface area for nutrient and water absorption that they mine from deeper layers.”
In exchange, the tree provides the fungi with carbohydrates.
These fungal networks also connect different plants, potentially facilitating nutrient transfer between them.
The last event of this series will be held on Thursday, 22 May 2025 (16:00–18:00) at Plas Du, Oswestry SY10 0BQ. To book on to this event or for more information, visit the Farming Connect website.
Farming
Paul Davies calls for stronger action to eradicate bovine TB in Wales
Ceredigion Penfro MS says disease is placing severe emotional and financial pressure on farming families
Paul Davies MS has urged the Welsh Government to use every available measure to tackle bovine tuberculosis and work towards eradicating the disease in Wales.
The Ceredigion Penfro Senedd Member raised the issue during a Senedd debate, warning that bovine TB continues to have a devastating impact on farmers, their families and rural communities.
Mr Davies called for a science-led and comprehensive strategy that addresses every potential source and route of infection.

He said farmers across west Wales needed clear leadership from the new Welsh Government and greater confidence that ministers were prepared to take effective action.
Mr Davies said: “Bovine TB continues to have a huge impact on farmers, their families and rural communities across Wales.
“It places enormous emotional and financial pressure on farming businesses and remains one of the most significant challenges facing our agricultural industry.
“Farmers and the wider rural community are looking to the new Welsh Government to provide leadership by introducing a holistic approach that addresses all routes of transmission.
“The Welsh Government must do everything it can to eradicate this appalling disease.
“I will continue to raise this issue on behalf of farmers in west Wales and press the Welsh Government to use every lever available to tackle bovine TB.”
Business
Development on Pembrokeshire farm with 700 herd approved
A RETROSPECTIVE call for amendments to a previously granted building and slurry lagoon at a 700-herd Pembrokeshire dairy farm has been given the go-ahead by county planners.
In an application to Pembrokeshire County Council, Bill Ridge of Vaynor Farm Ltd, Bethesda sought retrospective permission for a replacement agricultural building for cattle housing, the retention of a slurry lagoon as built and associated works at Talybont Farm, Llawhaden.
A supporting statement through agent Cynllunio RW Planning Ltd said: “Bill Ridge farms at Vaynor Farm, trading as Vaynor Farm Ltd. The farm is a 645-acre farm compromising of owned and rented land, this supports a dairy herd of circa 700 cows. The dairy system is an extensive grass-based spring calving system.
“The application is made following receipt of a letter from the local authority planning enforcement department stating that the replacement agricultural building which had recently been erected required planning permission and that the lagoon also recently built seemed not to be in line with the approved plans of [the 2022 application] recently approved on site for the lagoon.
“Therefore, this application seeks retrospective planning permission for the retention of the building as built and the lagoon as built.”
It said the 22.72 by 13.33-metre agricultural building “will house the farm’s dairy replacement heifers as a replacement to the previous building on site,” and the lagoon is of a similar size, depth and capacity to the previously approved one, other than slight changes in positioning and orientation, providing 4,500square metres of slurry storage, which in combination with the existing store of 6,900cubic meters at Vaynor will provide over 170 days’ storage.
It went on to say: “All development is reasonably required for the purpose of agriculture. The applicant does not intend to increase the farm’s stocking rate as a result of this development.”
An officer report recommending approval said the application had been amended since being submitted to improve the proposed green infrastructure, adding: “Information has been provided during the course of the application that proposal is not intended to result in, or support, an increase in the herd numbers of the agricultural enterprise.”
It concluded: “Based upon the information provided within the application, it is considered that the development would be reasonably necessary for the purpose of agriculture.”
The application was conditionally approved.
Farming
Heatwave puts added pressure on autumn-calving dairy herds
Farmers urged to review dry cow nutrition as grazing shortages and heat stress increase pre-calving risks
DAIRY farmers preparing autumn-calving cows are being urged to pay close attention to pre-calving nutrition as prolonged hot and dry weather reduces grazing availability and increases the risk of heat stress.
Dr Alison Bond, Technical Services Manager at Rumenco, said the six to eight weeks before calving were particularly important, with farmers needing to maintain suitable body condition and address any nutritional deficiencies.
She said: “Milking cows will naturally be front of mind when farmers are assessing grazing and rationing, but it is important not to forget the dry cows.
“Farmers should assess body condition during late lactation and adjust drying-off dates where necessary. Cows in poorer condition may need to be dried off earlier, with the aim of calving at around body condition score three and in optimum health.”
Where grass is limited, Dr Bond said farmers may need to consider housing dry cows and feeding a ration based on good-quality silage with appropriate supplements.
Careful nutrition during the dry period can help cows make a smooth transition from pregnancy into lactation and reduce the likelihood of problems including difficult calvings, milk fever, mastitis and retained placentas.
It can also affect fertility after calving and the quality of colostrum provided to newborn calves.
Dr Bond said: “Good-quality colostrum is essential during the calf’s most vulnerable period. It helps to prime the immune system and provides protection against challenges such as scour and respiratory disease.
“With the added pressure of heat stress and possible disruption to forage supplies, closer attention to the needs of dry cows will be particularly important this year.”
Farmers who have moved cattle indoors are advised to provide good-quality forage and, where possible, have it analysed for its mineral and trace element content so that any deficiencies can be identified.
Dr Bond said shortages of forage, or changes in its quality, could leave cows more vulnerable to deficiencies in minerals and trace elements during the weeks before calving.
Rumenco recommends using a specialist pre-calving supplement where necessary. The company produces LIFELINE Pre-Calver, available as a mineral bucket or crumb, which is designed to supply vitamins, minerals and trace elements to cows before calving.
The company says the product contains a low-calcium and high-magnesium balance intended to reduce the risk of milk fever and difficult calvings.
Rumenco also says trials have shown improvements in colostrum quality of up to 20 per cent, although farmers should seek independent nutritional or veterinary advice when deciding what supplementation is appropriate for their herd.
Dr Bond added: “Ensuring cows receive the nutrition they need is recommended best practice, particularly when they are facing additional stresses such as extreme heat and reduced grazing.
“Taking action before calving can support the health of the cow, improve calf vigour and help protect future fertility and milk production.”
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