Land levelling effects on nutritional status of soil and rice plants | |
| Author | Punya Polapukde |
| Call Number | AIT Thesis no.AE-79-26 |
| Subject(s) | Plant-soil relationships Consolidation of land holdings |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | A field survey of land levelling effects on nutritional status of paddy soils and rice plants was conducted in 1979. in Nongwai Pioneer Irrigation Agriculture Project, Khon Kaen, Thailand. Chemical and physical properties. 0f paddy soils and chemical compositions of rice plants were used as the basis of evaluating changes in nutritional status. To determine changes in nutritional status by land levelling conditions and by the time elapsed since land levelling, disturbed plots and undisturbed plots were selected by the stratified random technique within and near land consolidation blocks. The disturbed plots were subdivided into 'cut' and 'fill' zones and the undisturbed plots were 'intermediate' to 'cut' and 'fill' and a nearby 'natural' condition. Then the nutritional status of soils and rice plants in those polts were compared. Land levelling decreased the nutritional status in terms of N, P, and K during the first 2 years and the recovery rate for each of them was approximately 3 years. These are found to occur with the nutritional status of both soil and plant. In the cut zone, Sodium status of both soils and plants was increased to levels negatively affecting rice growth, while there was no serious effect in the fill zone. The calcium status was high in the first 3 years and first year in plants and soil, respectively. Base saturation status was similar to that of Calcium. The nutritional status of rice plants throughout the investigated area was dominated by N-deficiency, whereas the status of P and K was satisfactory. Under local practice, grain yields were found to be 2 to 3 ton/ha while in the present experimental plots with sufficient supply of fertilizer they increased up to 5.4 ton/ha. |
| Year | 1979 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Eppendorfer, W.H. |
| Examination Committee(s) | Apichart Anukularmphai ;Singh, Gajendra ;Olesen, Svend Elsnab |
| Scholarship Donor(s) | Carl Duisberg Gesellschaft |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1979 |