1. Puddling and N management effects on crop response in a rice–wheat cropping system;Aggarwal;Soil Till. Res.,1995
2. Anonymous, 2001. Agricultural Statistics at a Glance 2001. Directorate of Economics and Statistics, Department of Agriculture and Cooperation, Ministry of Agriculture, Government of India, New Delhi, p. 32.
3. Tillage and residue management effects on soil physical properties and rice yield in northwestern Himalayan soils;Bhagat;Soil Till. Res.,1994
4. Aggregate stability of puddled soil during rice growth;Chaudhary;J. Indian Soc. Soil Sci.,1969
5. Cochran, W.G., Cox, G.M., 1957. Experimental Designs. Wiley, New York.