Studies on residual effect of green manuring and farm yard manure for sustained productivity of rice-wheat-cropping sequence and on soil health under shallow groundwater table conditions
2004
Phogat, S.B. | Dahiya, I.S. | Hooda, R.S. | Sangwan, N.K. | Solanki, Y.P.S., Chaudhary Charan Singh Haryana Agricultural University, Rahtak, (India). Research Stn.)
A field study was conducted at CCSHAU Research Station, Rohtak from 1998-2001 to assess the productivity of rice-wheat system and soil health under shallow water table conditions by applying farm yard manure (FYM) and practising green manuring (OM) by growing sesbania. The total productivity of rice-wheat system increased significantly with OM and FYM as compared to control,and with FYM as compared to OM in all the years. The per cent increase in the productivity by OM and FYM was 5.4 to 15 and 14.5 to 31.3, respectively, over control. The bulk density and pH were lower, and infiltration rate, saturation percentage, wilting point, field capacity, available water holding capacity, cation exchange capacity and organic carbon content were higher in the FYM and OM plots than in the control plots and in the FYM than in the OM plots indicating the improvement in these soil properties. The decrease in pH of FYM and OM plots over that of control plots was 4.7 and 1.2 percent, respectively, and that of FYM plots over that of OM plots was 3.5 percent. The FYM and OM lowered down the bulk density as compared to control by 3.9 and 2.8 percent, respectively, whereas FYM reduced bulk density over OM by 1.2 percent. The increase by FYM in organic carbon, cation exchange capacity, infiltration rate, saturation percentage, available water holding capacity, field capacity and wilting point over control was 77.5, 10.7,30.0,6.3,5.6,8.9 and 12.9 percent, respectively.
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