Effect of Continuous Application of N, P, K and Zn on Yield and Nutrient Uptake of Irrigated Wheat and Maize and on Available Nutrients in a Tropial Arid Brown Soil

Results of field experiments with wheat (Kalyansona) and maize (Ganga 5) grown in a fixed rotation, showed significant responses of both the crops to N and P application. However, response by wheat was more than that by maize. Application of N, P, K and Zn increased significantly their respective absorption by the crops, although the magnitude varies under different levels of applied nutrients. Continued cropping with N alone depressed the available P and K and DTPA-extractable Zn levels, but continuons application of N, P, K and Zn resulted their build up in the soil.