ICAR Research Complex for NEH Region, Shillong, 793013, Meghalaya
Most profitable yield of potato and rice could be obtained by the continuous application of potassium at the rate of 80 and 60 kg K/ha, respectively in a potato-rice sequence in the high rainfall area of Meghalaya in the north-eastern hills. There was little build up of exchangeable K in the soil. At lower rate of application, the fertilizer potassium was completely fixed whereas at higher rate, part of it was lost. The optimum dose to maintain the native soil K for obtaining the maximum yield of potato-rice sequence was found to be 140 kg K/ha.
Continuous potassium application, crop yield, balance sheet for potassium
