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Previo	Forage tree legumes. I Productivity and N economy of leucaena, gliricidia, calliandra and sesbania and trees green panic mixtures	The use of nitrogen-15-depleted ammonium sulfate for estimating nitrogen fixation by leguminous trees	Standarization of in-vivo nitrate reductase activity in Albizia lebbeck, Acacia nilotica and Dalbergia sissoo	Nitrogen-fixation and nutrient relations in savanna woodland trees (Tanzania)	Comparative growth and symbiotic perfomance of seedling of Acacia spp. defined pot culture or as natural understory components of a eucalypt forest ecosystem in S.W. Australia	Nitrogen fixation (Acetylene reduction) by forest legumes: sensivity to pre-harvest and assay conditions	Growth of planted pine trees response to variation in the densities of naturally regenerated acacias	Siguiente

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Nitrogen-fixation and nutrient relations in savanna woodland trees (Tanzania)