||Facilitated learning in soil fertility management: assessing potentials of low-external-input technologies in East African farming systems
Jager, A. de; Onduru, D.; Walaga, C.
|| 17th Symposium of the International Farming Systems Association, 2002-11-17/2002-11-20
||LEI MARKT & K - Duurzame Handel en Ketenvorming
||Contribution in proceedings
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