TY - GEN AU - Hassan,M.A. TI - Study problems in producing hybrids and prospects of developing synthetic like varieties for attaining high and stable yields in rice (Oryza sativa L.) KW - Hybrids KW - Varieties KW - Yields KW - Oryza sativa KW - Dwarfs KW - Cultivation KW - Genetics KW - Seedlings KW - Pollination KW - Flowering ER -