Chopra, V. L., R. B. Singh, and anupam varma (eds) 1998: crop productivity and sustainability – shaping the future. Proceedings of the 2nd international crop science congress. Science publishers, inc., Enfield, new hampshire, usa. 1112 pp., Numerous figs and tables. Hb. Us$127.00. Isbn 1-57808-004-5.


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