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Haque, I. ,  Lupwayi, N.Z. ,  [Landform and phosphorus effects on nitrogen fixed by annual clovers and its contribution to succeeding cereals in the Ethiopian highlands] ,  Landform and phosphorus effects on nitrogen fixed by annual clovers and its contribution to succeeding cereals in the Ethiopian highlands

Lupwayi, N.Z. ,  Haque, I. ,  [Leucaena hedgerow intercropping and cattle manure application in the Ethiopian highlands. III. Nutrient balances] ,  Leucaena hedgerow intercropping and cattle manure application in the Ethiopian highlands. III. Nutrient balances

Zingore, Shamie ,  Murwira, HK ,  Delve, Robert J. ,  Giller, Ken E. ,  [Variable grain legume yields, responses to phosphorus and rotational effects on maize across soil fertility gradients on African smallholder farms] ,  Variable grain legume yields, responses to phosphorus and rotational effects on maize across soil fertility gradients on African smallholder farms

Basamba, T.A. ,  Barrios, E. ,  Amézquita Collazos, Edgar ,  Rao, Idupulapati M. ,  Singh, B.R. ,  [Tillage effects on maize yield in a Colombian savanna oxisol : Soil organic matter and P fractions] ,  Tillage effects on maize yield in a Colombian savanna oxisol : Soil organic matter and P fractions

Isaac, M.E. ,  Harmand, JM ,  Lesueur, Didier ,  Lelon, J ,  [Tree age and soil phosphorus conditions influence N2-fixation rates and soil N dynamics in natural populations of Acacia senegal] ,  Tree age and soil phosphorus conditions influence N2-fixation rates and soil N dynamics in natural populations of Acacia senegal

Vadez, Vincent ,  Lasso, JH ,  Beck, Douglas P. ,  Drevon, J.J. ,  [Variability of N2-fixation in common bean (Phaseolus vulgaris L.) under P deficiency is related to P use efficiency] ,  Variability of N2-fixation in common bean (Phaseolus vulgaris L.) under P deficiency is related to P use efficiency

Astudillo, Carolina ,  Blair, Matthew W. ,  [Contenido de hierro y cinc en la semilla y su respuesta a nivel de fertilización con fósforo en 40 variedades de frijol colombianas = Seed iron and zinc content and their response to phosphorus fertilization in 40 colombian bean varieties] ,  Contenido de hierro y cinc en la semilla y su respuesta a nivel de fertilización con fósforo en 40 variedades de frijol colombianas = Seed iron and zinc content and their response to phosphorus fertilization in 40 colombian bean varieties

López Molina, J. ,  El-Sharkawy, Mabrouk A. ,  López, Y. ,  [Fertilidad del suelo y calidad nutricional de estacas de yuca (Manihot esculenta Crantz)] ,  Fertilidad del suelo y calidad nutricional de estacas de yuca (Manihot esculenta Crantz)

Basamba, T.A. ,  Barrios, E. ,  Singh, B.R. ,  Rao, Idupulapati M. ,  [Impact of planted fallows and a crop rotation on nitrogen mineralization and phosphorus and organic matter fractions on a Colombian volcanic-ash soil] ,  Impact of planted fallows and a crop rotation on nitrogen mineralization and phosphorus and organic matter fractions on a Colombian volcanic-ash soil

Neufeldt, Henry ,  Silva, J.E. da ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Land-use effects on phosphorus fractions in cerrado oxisols] ,  Land-use effects on phosphorus fractions in cerrado oxisols