Nitrogenous manuring of black cotton soil

Abstract

Rain-fed cotton is the principal money crop of the black soil tracts of India, which are often characterized by low yields and where nitrogen alone, among the three fertilizer elements nitrogen, phosphorus and potassium, has been found to be essential for increasing the yield. Groundnut cake, ammonium sulphate and farmyard manure or compost have all given significant response, the expected increases in yield in pounds of seed cotton per acre for unit dose of nitrogen being 3·79 ± 0·22, 2·24 ± 0·17 and 1·19 ± 0·17 respectively.