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Aims To investigate factors limiting biological nitrogen fixation (BNF) by grain legumes in the Ethiopian Rift Valley in soils with different input legacies. Methods Two field experiments were set up, at a high-input (Hawassa) and a low-input (Lokabaya) site, comparing each two varieties of haricot bean (Phaseolus vulgaris var. Hawassa dume and Awash1) and mung bean (Vigna radiata var. N26 and Sunaina)...
Aims Evaluate biological nitrogen fixation (BNF) and its contribution to total N yield in different grass-clover mixtures under a boreal coastal climate and assess how winter conditions affect the survival of clover and its capability to fix nitrogen (N). Methods Grass-clover mixtures sown with 0, 15 and 30% red and white clover were subjected to two N rates and three levels of tractor trafficking...
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