Effect of liming and application of mussoorie phosphate on the yield of green gram, var. Co-1, grown in the upland laterites of Kerala state

Abstract

Green gram variety Co-1 was grown with different forms and levels of phosphates superimposing a treatment of fully burnt lime at 500 kg/ha. The forms of phosphates compared were Mussoorie phosphate, single superphosphate and a complex fertilizer, factomphos (16:20). The results indicate that the response of green gram variety Co-1 is limited up to 15kg PgCyha and that between the forms, there is no significant difference. The use of Mussoorie phosphate entails a net saving of Rs. 50 per ha at application rates of 15 kg PjOs/ha. After harvest, if the tops are recycled three-fourths of the N applied will be returned to the soil. It has been shown that the pulse crop can give a net profit of Rs, 500 per ha under Kerala conditions.