Significance of Potassium Use in Haryana Agriculture

摘要

Consumption of potassic fertilisers has increased in the state of Haryana. However, the quantity of fertiliser use is not only imbalanced but inadequate to meet the requirements of plant demand for optimum yield. The judicious fertiliser use takes in to consideration the nutrient status of the soils as well as crop responses to fertiliser applications. The present paper outlines the results of a systematically GPS based recently conducted survey analysis for K status of Haryana soils. Overall, more than 73% soils falling under low to medium category in available K indicate an alarming situation of the depleting scenario of K status in the state and emphasizes the need for the application of potassic fertilisers for maintaining crop yields and nutrient status. The study also shows the growing responses of K application under different crops and cropping systems. Based on the results of different on site and farm field experiments, new recommendations for K in crops viz., pearl millet, cluster bean, mustard and sugarcane have been advocated and has been recently included in the package of practices for kharif and rabi crops in Haryana. It is suggested that readily available pools of potassium do not clearly synchronise with the K uptake/removal by crops and for a better picture on K supplying power of soils the non-exchangeable K pool of the soil should be periodically and simultaneously monitored.