Response of sunflower (Helianthus annuus L.) to nitrogen application in a savanna alfisol von Oyinlola, E.Y., Ahmadu Bello University, Zaria (Nigeria). Faculty of Agriculture, Department of Soil Science, Ogunwole, J.O., Ahmadu Bello University, Zaria (Nigeria). Faculty of Agriculture, Department of Soil Science, Amapu, I.Y., Ahmadu Bello University, Zaria (Nigeria). Faculty of Agriculture, Department of Soil Science

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RESPONSE OF SUNFLOWER (Helianthus annuus L.) TO NITROGEN APPLICATION IN A SAVANNA ALFISOL / RESPUESTA DEL GIRASOL (Helianthus annuus L.) A LA APLICACIÓN NITROGENADA EN UN ALFISOL D... von Oyinlola, E.Y., Ogunwole, J.O., Amapu, I.Y.

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Radioactivity and heavy metal composition of Nigerian phosphate rocks: possible environmental implications von Ogunleye, P.O., Mayaki, M.C., Amapu, I.Y.

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Gender Perspectives of Action Research for Improved Rice Value Chain in Northern Guinea Savanna, Nigeria von Ayoola, J. B., Kudi, T.M., Dangbegnon, C., Daudu, C.K., Mando, A., Amapu, I.Y., Adeosun, J.O., Ezui, K.S.

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Qualitative and Quantitative Evaluation of Four Organic Materials as Nutrient Resources for Maize in the Nigerian Savanna von ., C.K. Daudu, ., E. Uyovbisere, ., I.Y. Amapu, ., J.E. Onyibe

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