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Green manuring of soils for increasing crop yield for stepping up food production in the country

By Uppal, H.L.. Punjab: Land Reclamation, Irrigation and Power Research Institute, 1972 . 12p. , Lib/WDR/8/2006-07(wdr no.15471)

By Uppal, H.L.. Punjab: Land Reclamation, Irrigation and Power Research Institute, 1962 . 12p. , Lib/WDR/8/2006-07(wdr no.15474)

By Uppal, H.L.. Punjab: Land Reclamation, Irrigation and Power Research Institute, 1962 . 7p.: 26cm..

By Uppal, H.L.. Punjab: Land Reclamation, Irrigation and Power Research Institute, 1963 . 14p.: 26cm..