Soil amendments to improve apple establishment

Intro

Using on-farm trials we plan to evaluate the combined use of biochar, trichoderma, and mycorrhizae (AMF) in newly established apple orchards, with the objective of reducing the time to full production, improving tree resilience, and contributing to the long-term sustainability and carbon footprint reduction of commercial apple production in England.

Newly planted apple orchards typically require four years to reach full production and at the end of an orchards life the trees are typically grubbed and burnt, releasing the carbon they have sequestered throughout their lifetime. Scientific advances suggest that the use of charged biochar, which could be made from grubbed apple trees, trichoderma, and mycorrhizae, either individually or in synergy, may speed up time to full production and provide an end of life use for the trees. However, these solutions remain untested in commercial orchards. This project seeks to address this knowledge gap through practical, on-farm trials.

The Farmers Involved

  • A C Hulme and Sons

Tom Hulme is the managing director of ACH Farming Ltd. They are mixed farmers based in East Kent in the Garden of England. They farm 4,000 acres in a triangle between Canterbury, Folkstone and Sandwich growing a diverse range of crops and produce. The business covers fruit, cattle, arable, asparagus and grapes. They are a top 5 UK tree and stone fruit grower-packer. The business is one of the most progressive and successful tree fruit growers in the country and farms 500 acres of modern high intensity orchards growing apples, pears, cherries, plums and apricots. The orchard business is complemented by on-site cold storage, grading, packing, marketing and distribution operations at Haoden Court, Ash.
 

  • Ian Overy Farms

Nick and Ian Overy are 5th and 6th generation farmers at Mascalls Court Farm, Paddock Wood. Burrs Hill Farm in Brenchley was purchased in 1983 and is the centre of their fruit production.

The Challenge

The Challenge

At the end of an orchards life, current practices involve grubbing and burning trees, which releases the carbon they have sequestered. Alternatively, leaving tress to decompose which also releases the sequestered carbon albeit more slowly and can spread disease from old wood. In addition, currently orchards typically take 5-6 years to reach commercial production. Reducing this period and improving tree health would improve both sustainability and profitability within the apple sector.

The Solution

The Solution

High-quality biochar can be produced from grubbed apple trees. This project will look at the combined use of nutrient-charged biochar and microbial amendments (AMF and Trichiderma) in newly planted orchards. The aim is that this combination will reduce establishment time, support stronger growth in year one, and accelerate fruiting.

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Apple

The Trial

The Trial
  • Scope:
    • 2 commercially managed orchards
    • Assessments taken in autumn 2026 and 2027
    • Assessments of tree health, tree growth and yield, soil, and economics
  • Design:
    • Randomised block trials in 2 geographically distinct apple orchards
    • Each commercially managed site will include five blocks, each with one replicate per treatment and 10 trees per plot (250 trees per orchard)
    • Amendments include, control (no amendment), charged biochar, AMF, charged biochar + AMF, Charged biochar + AMF + Trichoderma
  • Knowledge Sharing:
    • Factsheets made at the start and end of project sent to BAPL members and uploaded to BAPL website
    • Video describing project findings and grower insights
    • Trial visits

The Impact

The Impact

Incorporating biochar and beneficial microbes at planting can increase productivity of apply production by:

  1. Reducing the time it takes for newly planted orchards to become productive and profitable by approximately 1-2 years
  2. Reducing tree mortality and replanting costs
  3. Improving soil health and nutrient levels increasing yields
  4. Increasing orchard longevity

Improved soil health can also improve resilience and sustainability. Creating buichar from grubbed apple trees at the end of their life will sequester carbon rather than release it. The addition of this stable carbon to soil will further improve carbon sequestration of archards in the long-term.