Assessment of Soil Properties under Long Term Integrated Nutrient Management Using STCR-based Targeted Yield Equations under Rice-wheat Cropping System

The experiment was carried out to assess the effect of organic and chemical fertilizers on soil chemical properties under a nine year long experiment of AICRP on STCR initiated in Kharif 2008. The field experiment was laid out at research farm of JNKVV, Jabalpur after Rabi season of 2018-19. The study was framed in split plot design with four main treatments of nutrient management viz., T1-control; T2-GRD; T3- Soil test based NPK application for yield of 6.0 t ha-1 for each crop, and T4- Soil test based NPK application for yield of 6.0 t ha-1 for each crop + 10 t ha-1 yr-1 FYM and four soil depths as sub treatment from D1- 0-15 cm; D2- 15-30 cm; D3- 30-45 cm and D4 – 45-60 cm replicated three times. The results shows significant influence of INM on soil organic carbon (SOC), cation exchange capacity (CEC) and CaCO3 content of soil. After nine years of chemical fertilizer applications on general recommended dose bases and soil test bases in combination with FYM reported no profound impact on soil pH, electrical conductivity.