The high yielding varieties programme in India (1970-75); a joint study by Programme Evaluation Organisation and Australian National University - pt. 2: (Sect. A: Wheat. Sect. 2: Paddy)

arroz commercialisation conduite de la culture crop management cultivated land extension extension activities irrigation manejo del cultivo marketing mercadeo rendement rendimiento rice riego riz tierras cultivadas trigo variedades varieties vulgarisation wheats yields