Economic aspects of high yielding varieties of rice with special reference to national price policies - Irri report

adaptation arroz conduite de la culture cost benefit analysis crop management economic situation ensayos de variedades fertilisation fertilizer application filipinas fitomejoramiento geographical distribution hybridation hybridization manejo del cultivo philippines plant breeding politique des prix price policies rendement rendimiento rice riz tropical zones variedades varieties variety trials yields zona tropical zone tropicale