Agroforestry is a cultivation system in which agricultural crops or cattle farm are combined with the production of trees at the same parcel. Different layers, above and under the ground, give a more efficient use of light, water and nutrients. The use of trees leads to a healthier soil, higher yields and homes for wildlife.
Interesting links:
Agroforestry (Soil Association)
Afinet (Agroforestry innovation network)