Nature and importance of soil-related constraints to bean production in Kenya
1988
Kamoni, P.T. (Kenya Soil Survey, National Agricultural Laboratories, Nairobi (Kenya))
A general summary is given of the major soil types found in the main bean producing areas of Kenya: Nitosols, Acrisols, Ferralsols, Luvisols, Cambisols, Andosols, Phaeozems, Planosols, and Vertisols. Physico-chemical properties indicated for each are color, texture, structure, drainage, CEC, pH, base saturation, and fertility (Ca, Mg, K, P, Mn, and percentage N). Soil constraints to bean productivity in the country are listed according to soil type, indicating possible control measures. New fertilizer recommendations for monocropped beans are given on the basis of on-farm trials carried out in the Machakos, Embu, Kisii, and Kakamega Districts and in the area around Thika. Response to P application was not clear. In Kisii, beans responded well to its application but in Embu and Thika, response occurred only in the presence of N. In Western Province where soil P values were low, the response to P application was also low. N and P are considered the major soil constraints for bean productivity in the country.
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