Fertilizer Response to Wheat in Kenya

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Seitzer*, J. F.
Buut, M. J.
Mulamula, H. A.
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A fertilizer research programme on wheat was started in 1967 to investigate some of the factors limiting grain yields in Kenya, and to obtain estimates of response to nitrogen, phosphate, potash, lime and seed rate. In 1967 and 1968, 30 and 32 trials respectively were conducted throughout the wheat-growing areas. The average yield obtained in the two years was 3,028 and 3,084 kg./ha. respectively, with 1,207 kg./ha. as the lowest yield, and 6,597 kg./ha. as the highest. The latter figure serves as an indicator of the yield potential under good husbandry methods and proper fertilization. Phosphate remains the most important single nutrient. Fifty per cent of the trials gave significant response to applied P. Response to P was found to be higher when wheat was planted after grassland, etc., than under continuous cropping systems. Response to nitrogen was found in 40 per cent of the trials, and was considerable under continuous cropping but less effective if wheat is planted after grass.
East African Agricultural And Forestry Journal, XXXVI (1970), p. 131-138