2014-05-022014-05-021992http://krishikosh.egranth.ac.in/handle/1/2058098en-USwheats, crops, farmyard manure, maize, byproducts, rice, productivity, soybeans, fertilizers, cowpeasAnnual Report 1987-88 and 1988-89: All India Coordinated Research Project on Long Tern Fertilizer ExperimentsReport