Foliar nutrition of Nitrogen and Phosphorous in groundnut.

Abstract

The field experiments were conducted during kharif season of 1988 and 1989 to find out the possibilities and benefits of foliar application of nitrogen and phosphorus in groundnut in comparison with their soil application. It was observed that foliar application of N and P fertilizer showed higher efficiency and produced more pod per unit of nutrient applied than their soil application. Among the different modes of application, applying 50% of these fertilizer doses as basal followed by two foliar spray of I aqueous suspension of these fertilizers gave the yield at par with that obtained by soil application of full dose of these fertilizers. This was also found to be economical as the rate of fertilizer was lesser than soil application alone. On art average the soil application of 20 Kg N ha-1 as urea, 40 Kg P, 05 hel as SSP (Single super phosphate) and 20 Kg N+ 40 Kg P2 05 ha-1 produced 13.1 to 21.8, 9 0 to 16.5 and 20.0 to 28.6% more pod than control, respectively, However, the application of 50% amount of these fertilizers in soil as basal followed by two foliar sprays of 1% aqueous suspension of these fertilizer at 30 and 70 days after sowing (DAS) showed 13.5 to 23.5, 9.0 to 18.4 and 20,5 to 30.1% more pnd yield over control, respectively.