Permanent beds and rice-residue management for rice-wheat systems in the Indo- Gangetic Plain : proceedings of a Workshop held in Ludhi ana, India, 7-9 September 2006 - Permanent beds and rice-residue management for rice-wheat systems in the Indo- Gangetic Plain Ludhiana, India 7-9 September 2006; Humphreys, E.; Roth, C. H. (Canberra : Australian Centre for International Agricultural Resea rch, 2008)
Includes bibliographical references .
Keywords: Factors of production