An Asian Journal of Soil Science

Manoj Dutta ¹, Roba Sangtam ¹

Affiliations
1 Department of Soil Conservation, School of Agricultural Sciences and Rural Development, Nagaland University, Medziphema Campus, Medziphema (Nagaland), IN

Abstract

The effect of integrated nutrient management practices on some important soil properties on terraced land under continuous cultivation after a decade were studied in a field experiment conducted on the experimental farm of the School of Agricultural Sciences and Rural Development under rainfed conditions. Twelve treatments involving N, P and K (NPK) fertilizers, FYM, poultry litter, forest litter incorporated and burned, Azospirillum and Zn either alone or in combinations were applied for 10 years and rice crop cultivated continuously. The organic C content, available K, WHC and per cent aggregation increased significantly in all the treatments whereas, CEC and MWD increased significantly in all the treatments except ½ N+ PK and forest litter burned+ ½ FYM over control. The rate of build up of available N, P and K in various nutrient management practices was estimated to be 0.97 to 24.46 kg N ha^-1 yr^-1 with an average of 13.51 kg N ha^-1 yr^-1, 0.07 to 1.60 kg P ha^-1 yr^-1 with an average of 0.75 kg P ha^-1 yr^-1 and 2.4 to 8.2 kg K ha^-1 yr^-1 with an average of 4.7 kg K ha^-1 yr^-1, respectively. Addition of FYM, poultry litter and forest litter with NPK increased 8.4, 16.7 and 7.6 per cent in aggregates >0.25 mm, respectively as compared to NPK alone.

Keywords

Nutrient Management, Soil Properties, Terraced Land.

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