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Improving Biological Nitrogen Fixation (BNF) by Groundnuts (Arachis hypogea L.) Grown in Acid Soils Amended with Calcitic and Dolomitic Limestones

R. Merckx · J.K. Ogega · J.R. Okalebo · D.K. Okello · D.A. Onyango · C. Othieno · A.N. Otinga · P. Pypers · B.A. Were