Dynamic land capability model: a case history
| Autor: | A. L. M. van Wijk, R.A. Feddes |
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| Rok vydání: | 1990 |
| Předmět: | |
| Zdroj: | Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences. 329:411-419 |
| ISSN: | 1471-2970 0962-8436 |
| DOI: | 10.1098/rstb.1990.0183 |
| Popis: | A computer simulation approach has been developed that quantifies land capability in terms of crop productivity under different conditions of climate, soil, drainage or irrigation and farm management. This model deals with: (i) the dates and number of days in spring when soil moisture content falls sufficiently to permit soil cultivation and sowing or planting (farm management aspect); (ii) duration of germination and time of emergence in relation to soil moisture and temperature; (iii), water uptake, development, growth and harvest of the crop; (iv) number and time of soil workable days available for the harvest of root crops in autumn (farm management aspect). The model was applied to compute effects of land drainage (15 combinations of drain depth and distance) on the yield of potatoes and spring cereals growing during 30 years (1952-81) on eight different soil types in the Netherlands. The outcome of this study was used as a basis for a nationwide system for evaluating the effects of soil and drainage upon crop yields. The methodology of the integrated model approach can be applied in other climates for a variety of crops growing on different soil types. It can be used to evaluate not only drainage effects on yield, but also those of irrigation and soil improvement. The approach is applicable to land evaluation studies in general. |
| Databáze: | OpenAIRE |
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