Let's Plant is a Germany based non Profit organization that collects and distributes funds for worldwide replanting and soil restoration initiatives!
check out www.lets-plant.org for further information.

this video plantation field is linked to a soil study exercise in collaboration with Albert Ludwigs University of Freiburg in Germany & Mollesnejta institute of Agroforestry in Bolivia that aims to develop scientific guidelines for recovery and improvement of soil fertility.
Papers and experiences @ www.mollesnejta.org