Vol. 11, Special Issue 11 (2022)

A field experiment was carried out in Rabi, 2017-18 and continued to Rabi 2018-19 at research farm, College of Agriculture and Research Station, Raigarh (C.G.). The experiment was laid out in randomized block design with three replications and consisted eleven treatments namely (T₁) Control, (T₂) GRD, (T₃) 75% GRD+RB@2.5 t/ha, (T₄) 75% GRD+RR@5 t/ha, (T₅) 75% GRD+RR@5 t/ha+FYM @2.5 t/ha, (T₆) 75% GRD+ RB@2.5 t/ha+FYM @2.5 t/ha, (T₇) T3+Trichoderma+FYM @2.5 t/ha, (T₈) T4 + Trichoderma + FYM @ 2.5 t/ha, (T₉) 75% GRD+RR@5 t/ha+6%ureaspray, (T₁₀) 75% GRD+RR@ 5 t/ha RB @2.5 t/ha, (T₁₁) T10+6% urea spray. The bulk density was recorded maximum with 100% GRD (1.47Mgm^-3) during both the years. The particle density of soil recorded 2.62 Mg m^-3 and 2.63 Mgm^-3 respectively during both the years. Porosity ranged from 43.86 (100% GRD) to 47.04 (75% GRD + rice residue @ 5t/ha+ rice biochar @2.5t/ha) and 44.31 (100% GRD) to 47.89 (75% GRD + rice residue @ 5t/ha+ rice biochar @2.5t/ha+ 6% urea spray) % after rice-groundnut cropping system of 2017-18 and 2018-19, respectively. The lowest mean pH value was recorded (6.73) in control and the highest pH (6.95) in treatment 75% GRD + rice residue @ 5 t/ha+rice biochar @2.5t/ha+6% urea spray. The electrical conductivity of the soil ranged from 0.22 to 0.27 dSm^-1 where minimum value was observed with control and maximum with the treatments of 75% GRD + rice residue @ 5t/ha+ rice biochar @ 2.5 t/ha+6% urea spray. The CEC values ranged from 13.52 to 20.19 cmol (p+) kg^-1and 13.66 to 20.42 cmol (p+) kg^-1 was recorded after rice-groundnut cropping system of 2017-18 and 2018-19 respectively.