A three year field study was undertaken to assess the influence of water table management, namely subsurface irrigation and controlled drainage, on the movement of pesticides through the soil profile into ground water. The herbicides under investigation were prometryn on an organic soil, and metolachlor on a sandy soil. Both soil and groundwater were collected and analyzed. The results presented are those obtained in the first two years of the project. / In the organic soil, herbicide leaching was greatly reduced due to the management of the water table. The pesticide remained higher in the soil profile, preventing leaching to the drains and allowing degradation. / The opposite effect appeared to have occurred in the sandy soil. The higher water table resulting from subsurface irrigation may have induced the leaching of the contaminant into lower soil levels and into the ground water. The high water solubility of the herbicide metolachlor, in conjunction with low microbial activity, may have played a role in this phenomenon.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.69596 |
| Date | January 1993 |
| Creators | Arjoon, Diane S. |
| Contributors | Prasher, S. O. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Agricultural Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001338386, proquestno: AAIMM87940, Theses scanned by UMI/ProQuest. |
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