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Studies of Soil Moisture in the “Great Plains” Region
Published online by Cambridge University Press: 27 March 2009
Extract
1. All determinations of soil moisture should be made to a depth of from four to five feet for wheat and oats, and to a depth of six or seven feet for grasses.
2. Unless all the soil under consideration is very uniform, determinations of the hygroscopic coefficient are indispensable. The determination of this value is extremely important even where the soil is uniform.
3. The storage capacity for available water of the two soil types studied, may be placed at from five to seven inches of rainfall for wheat and oat crops.
4. A better idea of the moisture conditions of the soil at Indian Head may be obtained from a casual examination in the field than from the drying and weighing of the samples, unless the hygroscopic coefficient is considered.
5. The moisture stored in the subsoil during the previous summer, and not the frost of the preceding winter, is the cause of the high yields of wheat and oats obtained in southern Saskatchewan.
6. The soil of southern Saskatchewan does not remain permanently frozen at any depth.
7. Investigations of the moisture conditions to a depth of only 12 to 16 inches are of no value and may often be entirely misleading.
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- Copyright © Cambridge University Press 1908
References
page 334 note 1 University of California Agrio. Exp. Sta., Circular 6 (1903), p. 17.Google Scholar
page 337 note 1 This sample was lost, so the figure for the sixth foot in 1905 has been adopted.
page 340 note 1 Presidential Address, British Association (1898), Report, p. 8; The Wheat Problem, p. 22 (1900).Google Scholar
page 340 note 2 Agriculture (7th Ed.), vol. I. p. 144.Google Scholar
page 341 note 1 Now the southern portion of the Province of Saskatchewan.