Khan, A.R., Singh, S.S., Prasad, L.K., Sikka, A.K., Subrahmanyam, D., Singh, S.R. and Gaunt, J.L. 2004. Improved livelihood and environment through deep summer ploughing in rice based cropping system of heavy soils of Eastern India. Annex Bix of the Final Technical Reports of projects R7830 and R7839. Rothamsted, UK: Rothamsted Research and Patna, India: ICAR Research Complex for Eastern Region. 41 pp.