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Robust estimation of the error variance of the ratio estimator
(Egerton Journal of Humanities, Social Sciences and Education, 1999)
Biological nitrogen fixation in selected legumes of the semi-arid Makueni District of Southeast Kenya
(Der Tropenlandwirt-Journal of Agriculture in the Tropics and Subtropics, 1999)
The major objective of this study was to investigate biological nitrogen fixation in two main legumes (green gram and common bean) grown in semi-arid southeast Kenya. Nodulation experiments on the two legumes were carried ...