SALT STATUS OF SOME SOILS OF THE SLAVE RIVER LOWLANDS IN CANADA'S NORTHWEST TERRITORIES

Autor:	A. M. F. Hennig, R. R. Cairns, B. Siemens, W. L. Pringle
Rok vydání:	1975
Předmět:	Salinity Hydrology Agriculture business.industry Soil water Soil Science Environmental science Soil classification Arable land Agricultural productivity business Subarctic climate Cropping
Zdroj:	Canadian Journal of Soil Science. 55:399-406
ISSN:	1918-1841 0008-4271
DOI:	10.4141/cjss75-047
Popis:	As part of a study to determine the agricultural potential of 833,000 ha of land in Canada's Northwest Territories along the Slave River it was found that the poorly drained soils of the Grand Detour complex were saline to varying degrees. It is estimated that about 80,000 ha of Rego Humic Gleysols have electrical conductivities exceeding 4 mmhos/cm in the surface 20 cm. Sampling of soils and water indicated that sodium was the prevalent cation and that it was present in some soils in amounts sufficient to limit agricultural production. It was shown that surface disturbance, as in land preparation for cropping, increased salinity in the surface layers of soil thus reducing the potentially arable area to those soil types in which concentrations of salts are much lower. Results of this study show that salinity problems are not confined to warmer areas of the world but may also be a factor in restricting agricultural expansion into the subarctic.
Databáze:	OpenAIRE
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