Effect of preceding crops and nitrogen rates on soil organic carbon and total soil nitrogen content
B.P. Yadav1, D.N.Yadav2, K.B. Koirala1, K.R. Pandey2 and R.B.Thapa2
1Regional Agriculture Research Station, Parwanipur, Bara, Nepal Agriculture Research Council, Nepal.
2Institute of Agriculture and Animal Science, Rampur Chitwan, Tribhuban University, Nepal.
Abstract
Field experiment was conducted during 2010 and 2011 at IAAS farm Rampur chitwan to find out the effect of preceding crop and nitrogen rates on soil organic carbon and total soil nitrogen. In summer season crops grown where green gram , cowpea , black gram , cluster bean maize and fallow in main plots and in winter season, winter maize was grown with five levels of nitrogen 0, 50, 100, 150, 200 kg N/ha in sub plots in each season after the harvest of crop. Soil from each plot analysed for organic carbon and total nitrogen content of soil. Organic carbon and total nitrogen content of soil after summer legume crops was found higher than after summer maize and fallow. Similarly soil organic carbon and nitrogen content were higher under legume consisting sequence than fallow maize and maize -maize sequence. Further organic carbon and total nitrogen content of soil after winter maize increased with increasing rates of nitrogen to maize.
Int. J. Grad. Res. Rev. Vol-2, Issue-1: 21-24
