Impact of graded levels of fertilisers on soil available nutrients in inceptisol by hybrid maize (CO6)

Abstract

A field experiment was conducted to evaluate graded levels of fertilizers on soil available nutrients and grain and straw yield of hybrid maize on Inceptisol. The experimental soil was sandy clay loam with alkaline pH and non-saline in nature. The soil was low in organic carbon and available N, medium in available P and high in available K. The available Zn, Cu, Fe, and Mn were in sufficient status. Among the STCR - IPNS treatments, the highest and significant grain yield of 12032 kg ha-1 was recorded in STCR - IPNS-200% of FD for 5 t ha-1 + FYM @ 12.5 t ha-1 (T10) followed by STCR - IPNS - 175% of FD for 5 t ha-1 + FYM @ 12.5 t ha-1 (T9) (11393 kg ha-1). KMnO4 N status ranged from 162 to 166 kg ha-1 at 30 DAS, 156 to 166 kg ha-1 at 60 DAS, 147 to 158 kg ha-1 at 90 DAS, 142 to 152 kg ha-1 at harvest stage of maize. Olsen- P values ranged from 13.2 to 17.6 kg ha-1 at 30 DAS, 12.7 to 17.1 kg ha-1 at 60 DAS, 11.8 to 15.8 kg ha-1 at 90 DAS and 11.4 to 13.6 kg ha-1 at harvest stage. NH4OAc-K ranged from 422 to 432 kg ha-1 at 30 DAS, 410 to 426 kg ha-1 at 60 DAS, 403 to 417 kg ha-1 at 90 DAS and 396 to 410 kg ha-1 at harvest stage.