Effect of long term application of fertilizer and manure on soil properties of a vertisol in soybean-wheat cropping sequence

A field experiments was conducted under All India Co-ordinate Research Project on “Long term Fertilizer Experiment” during 2015-16 with soybean-wheat cropping sequence at the Research Farm Department of Soil Science and Agricultural Chemistry, J.N. Krishi Vishwa Vidyalaya, Jabalpur (M.P.), India to the present investigation was assess the chemical properties of a Vertisol. There were. Ten treatments were imposed with four replications in simple randomized block design in both soybean and wheat crops. The treatments were T1 (50% NPK), T2 (100% NPK, T3 (150% NPK), T4 (100% NPK+HW), T5 (100% NPK + Zn), T6 (100% NP), T7 (100% N), T8 (100% NPK+FYM), T9 (100% NPK-S) and T10 (Control). The results obtained from the present investigation clearly indicated that chemical properties changes in pH and EC in surface and sub-surface soils under different treatments were statistically non-significant. However, the treatments of long-term application of balanced nutrients with and without FYM have significant effect on organic carbon content, cation exchange capacity, calcium carbonate and microbial biomass carbon in surface and sub-surface soils under soybean-wheat cropping system.