Harvest index and evolution of major food crop cultivars in the tropics
Relative importance of harvest index (I) and total biomass yield (B) to economic yield (Y) was assessed in several food crops at different levels of environmental productivity. Importance of B is generally higher in low than high yielding environments, while that of I is higher in high than low yiel...
| Autor principal: | |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
1990
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/42930 |
| _version_ | 1855529576255455232 |
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| author | Kawano, K |
| author_browse | Kawano, K |
| author_facet | Kawano, K |
| author_sort | Kawano, K |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Relative importance of harvest index (I) and total biomass yield (B) to economic yield (Y) was assessed in several food crops at different levels of environmental productivity. Importance of B is generally higher in low than high yielding environments, while that of I is higher in high than low yielding environments. In some crops B is important throughout different yield levels while in others I is important even in low yielding environments.
Past efforts by anonymous farmers have consummated a good part of genetic improvement of crop yields through improvement in B. Many venerable land cultivars of grain crops, adapted to unimproved, limited-input cultural conditions, evolved through this process. The same process may not have thoroughly exhausted the yield improvement opportunity through improving I. Success in yield improvement by modern breeding has been limited mainly to high-input cultural conditions characterized by higher soil fertility and irrigation mainly through improvement in I. Varietal improvement possibility for less productive environments is discussed. |
| format | Journal Article |
| id | CGSpace42930 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1990 |
| publishDateRange | 1990 |
| publishDateSort | 1990 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace429302024-08-27T10:36:20Z Harvest index and evolution of major food crop cultivars in the tropics Kawano, K manihot esculenta harvest index biomass root productivity productivity starch crops indice de cosecha produccion de biomasa productividad de raices Relative importance of harvest index (I) and total biomass yield (B) to economic yield (Y) was assessed in several food crops at different levels of environmental productivity. Importance of B is generally higher in low than high yielding environments, while that of I is higher in high than low yielding environments. In some crops B is important throughout different yield levels while in others I is important even in low yielding environments. Past efforts by anonymous farmers have consummated a good part of genetic improvement of crop yields through improvement in B. Many venerable land cultivars of grain crops, adapted to unimproved, limited-input cultural conditions, evolved through this process. The same process may not have thoroughly exhausted the yield improvement opportunity through improving I. Success in yield improvement by modern breeding has been limited mainly to high-input cultural conditions characterized by higher soil fertility and irrigation mainly through improvement in I. Varietal improvement possibility for less productive environments is discussed. 1990-04 2014-09-24T07:58:47Z 2014-09-24T07:58:47Z Journal Article https://hdl.handle.net/10568/42930 en Limited Access Springer |
| spellingShingle | manihot esculenta harvest index biomass root productivity productivity starch crops indice de cosecha produccion de biomasa productividad de raices Kawano, K Harvest index and evolution of major food crop cultivars in the tropics |
| title | Harvest index and evolution of major food crop cultivars in the tropics |
| title_full | Harvest index and evolution of major food crop cultivars in the tropics |
| title_fullStr | Harvest index and evolution of major food crop cultivars in the tropics |
| title_full_unstemmed | Harvest index and evolution of major food crop cultivars in the tropics |
| title_short | Harvest index and evolution of major food crop cultivars in the tropics |
| title_sort | harvest index and evolution of major food crop cultivars in the tropics |
| topic | manihot esculenta harvest index biomass root productivity productivity starch crops indice de cosecha produccion de biomasa productividad de raices |
| url | https://hdl.handle.net/10568/42930 |
| work_keys_str_mv | AT kawanok harvestindexandevolutionofmajorfoodcropcultivarsinthetropics |