Potassium Fertilization in Rice–Wheat System across Northern India - Crop Performance and Soil Nutrients

Rice (Oryza sativa L.)–wheat (Triticum aestivum L.) cropping in South Asia is under stress due to widespread removal of plant nutrients in excess of their application. Potassium (K), sulfur (S), and Zinc (Zn) application to rice and wheat in 60 farmer’s fields in five districts across northern India showed that application of K increased rice yields by 0.6 to 1.2 Mg ha–1 and wheat yields by 0.2 to 0.7 Mg ha–1 across the locations varying in soil texture, soil K, climate, and irrigation. Application of S and Zn with K further increased yields. (Agron J., 105:471-481)

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