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Understanding variability in the benefits of N2-fixation in soybean-maize rotations on smallholder farmers’ fields in Malawi

2017; Elsevier BV; Volume: 261; Linguagem: Inglês

10.1016/j.agee.2017.05.008

1873-2305

D. van Vugt, A.C. Franke, K.E. Giller,

Legume Nitrogen Fixing Symbiosis

Soybean production can contribute to the nitrogen economy of smallholder farming systems, but our understanding of factors explaining variability in nitrogen fixation and rotational benefits across farms and regions is limited. Biological nitrogen fixation (BNF) was quantified with the natural abundance method in 150 farmer-managed soybean plots under different varieties and inputs in Dowa, Mchinji and Salima districts of Malawi. Soybean yielded on average 1.2 t ha