Field plots under organic and conventional management system were investigated to detect the effects of soil management practices on their soil physical, chemical and microbiological properties. The 16 farms studied, located in France, were arranged into eight matched pairs (organic/conventional). / The study revealed that in comparison with the conventionally managed soils, the organically managed soils tended to have equal to higher pH, buffering capacity, Ca, organic matter and moisture contents, and lower potential acidity values, as well as higher numbers of aerobic mesophyle and lactobacilli, and more intense alkaline phosphatase activity. The differences in soil properties between the members of matched pairs, in general were relatively small. / Soil organic matter content and nutrient availability (Ca, P), the use of lime and/or soil CaCO$ sb3$ concentrations, and use of chemical fertilizers and pesticides were found to have an influence on soil microbial activity. Soil and crop type were also found to influence some of the chemical and biological properties.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.67542 |
| Date | January 1993 |
| Creators | Lévesque, Micheline |
| Contributors | Hill, Stuart B. (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 Entomology.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001338487, proquestno: AAIMM87806, Theses scanned by UMI/ProQuest. |
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