Indian science news associationSaha, M.N ; Ukil, A.C ; Ghosh, J.C ; Bose, D.M ; Ray ,P2013-08-242013-08-241946ISSN;0036-8156http://krishikosh.egranth.ac.in/handle/1/2039255en-USmanpower, biological phenomena, diseases, productivity, planting, irrigation, land resources, oils, imports, surface waterJournal