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  • The possible role of trees in farming systems of the tropics
  • Exploitation of microbial systems of tree/plant species - India
  • Low-input technology for managing oxisols and ultisols in tropical America
  • Chemical fertilizer aid to Nepal
  • Alley-cropping with leucaena
  • Training courses ecological agriculture in developing countries
  • Rediscovery of the organic system in Indian agriculture
  • The seeds action nework:  towards a sustainable agriculture