TY - BOOK AU - Punjab. Economics & Statistical Organisation TI - Economics of tractor cultivation and economics of production and cultivation practices of high yield varieties of wheat maize(Hybrid) and Paddy in Punjab: Report U1 - 338.160 954 5 P93E KW - FARM MECHANIZATION -- PUNJAB KW - AGRICULTURE -- ECONOMIC ASPECTS -- PUNJAB KW - GRAIN RESEARCH ER -