Trees, Trees, Trees! How we can grow food around, within and on them - with Ben Raskin

What is agro-forestry and how does it differ from Silvo-pasture or Agro-ecology? And when we've sorted that out, how is it that trees can become an integral part of our farming landscape, so that we can feed ourselves, while increasing the life, resilience and vibrancy of the soil? With Ben Raskin of Head of Horticulture and Forestry at the Soil Association.