Effect of graded levels and split application of nitrogen in yield, yield attributes and economics of hybrid maize

Abstract

A field experiment was conducted at AC&RI, Madurai during Rabi season to study the effect of graded levels and split application of nitrogen on yield of hybrid maize and to optimize nitrogen fertilizer usage. The experiment was laid on RBD and replicated thrice. Treatments comprised of T1 to T10 with RDN (250 kg/ha), and STCR (167 kg/ha) on 3 splits and nitrogen levels 225, 200, 175 and 150 kg/ha under 3 splits and 4 splits on the variety CO MH-6. Results showed that higher grain yield (9320 kg/ha) and stover yield (11180 kg/ha), was with T7, it also register highest gross return ( ₹ 139802), net return (₹ 84080) and B:C ratio (2.51). From the results, it is concluded that application of T7 is the optimum dosage and timing of split application of nitrogen for Co MH-6. However in economic point of view T6 has an advantage.