Browsing by Author "Wapakala, W.W."
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Item The Effect of Nitrogen, Phosphorus and Copper on Grain Yield of Wheat on a Copper-Deficient Soil(1973) Wapakala, W.W.; Ministry of Agriculture, Nairobi, KenyaThe effects of nitrogen, phosphate and copper on the grain yields of wheat on a copper deficient soil were studied in both greenhouse and field trials. Using the method of Systematic Variation in the greenhouse studies, it was found that the optimum ratio of phosphorus: copper for wheat production was 2: 1.
