Trees on farms can boost productivity by 30% – new agroforestry handbook
29 July 2019
Planting trees on farm can boost farm productivity by 30% and improve animal welfare, according to a new agroforestry handbook published this week.
The free handbook, produced in collaboration with the Farm Woodland Forum and the Soil Association, aims to inform farmers of the benefits of agroforestry, as well as helping farmers decide which trees and system are best for their farm.
Drawing on case studies from across the globe, the new handbook concludes that agroforestry systems are often more than 30% more productive than monocultural systems.
It also highlights opportunities for UK farmers to replace imports with tree products such as fruit, nuts, fence post timber, animal bedding, fuel wood and mulches.
Ben Raskin, Soil Association head of horticulture & agroforestry, said: “At a time of great environmental and political uncertainty, planting trees on farms is a great way to help farmers keep their farms sustainable and resilient for years to come.
“Trees can bring a whole range of benefits both to the farm and wider environment including improved soil health, carbon capture, biodiversity and animal welfare, as well as protecting soil from wind and water erosion given the increasingly volatile weather we are getting.
“There is a lack of support and information available from government on how farm businesses can make agroforestry work both in the long and short term, so we are delighted to have been a part of this project to create a practical guide for farmers.”
The guide provides detail on the different types of agroforestry, including combining trees and livestock in silvopastoral systems, combining trees and crops in silvoarable systems, and using hedgerows, shelterbelts and riparian buffer strips.
According to the handbook, improving animal welfare with trees can boost farm productivity with:
• 17% increase in milk production
• 50% reduction in lamb mortality
• Shelter: If animals are sheltered from sun, wind, rain or snow, they use less energy to keep cool or warm and can therefore use that energy to put on weight or produce more milk.
• Forage: Trees can also provide extra food for livestock – e.g. mulberry leaves have up to 28% protein 4. This can be grown either to be eaten fresh or dried and fed like hay in the winter.
• Health: A range of tree crops to browse can also improve health – e.g. cattle often self-medicate by eating willow, which contains salicylic acid, the active ingredient in Aspirin.
• Grazing: Trees can increase the length of a grazing season, by increasing temperature due to shelter, and helping to dry out wetter areas of land it is sometime possible to increase grazing days. This reduces the need for farmers to bring in food from elsewhere.
To download or request a printed version of the handbook for free, visit www.soilassociation.org/agroforestry.
The handbook will be officially launched at an agroforestry information event at the Royal Agriculture University and Duchy Home Farm on 5 September. Visit Eventbrite to find out more and register to attend.