Research on natural resources management: strategic research issues and IRRI's approached to addressing them
For crop and resource management in irrigated rice, it is useful to consider three yield gaps. The first is the gap between the yield potential of the current best germplasm and the absolute yield potential determined by climate and thermodynamics. The second is the gap between yield attainable at favored sites using the best established practices and yield attained at experiment stations. The third is the gap between present average farm yield and the highest yields at favored sites.
Studies in favorable areas in the Philippines suggest that the second gap has been closed; it will remain closed until germplasm with a higher yield potential is available. The third gap, however, remains substantial and there is considerable scope for raising average yields by improving the use and management of nutrients. Closing this gap will require much better tailoring of management to site-specific problems.
- Publisher: International Rice Research Institute
- Language: English
- ISSN: 0117-8180
- Pages: 34