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dc.contributor.authorPoyser, Edward A.en_US
dc.date.accessioned2011-06-06T18:12:22Z
dc.date.available2011-06-06T18:12:22Z
dc.date.issued1950en_US
dc.identifierocm72797285en_US
dc.identifier.urihttp://hdl.handle.net/1993/4649
dc.description.abstractIn the naturally fertile soils of the semi-arid regions of North America, especially those of clay and sandy texture, the physical properties are highly significant and have a profound effect upon the productive capacity of the soil. Favorable soil structure is essential in the maintenance of soil productivity. Under a system of intensive cultivation deterioration of soil structure occurs. In the Red River Valley the maintenance of desirable structural characteristics is essential if maximum crop yields are to be obtained. A natural degradation process similar to the classical "solonchak-solonetz-solod" series occurs in the Red River Valley. Structure in the "solonetz" of Europe and North America has been correlated with the existing physical and chemical conditions. The morphological conditions characteristic of "solonetz" as typified by European investigators are known to exist in the "valley". Under arable culture, deterioration of soil tilth has become a problem throughout much of the Red River Valley. In the alkalinized and degraded alkalinized phases of the Morris Soil associate, dispersion of the colloidal material of the soil apparently occurs. A massive structural condition has been developed, under which plough draft is doubled and soil made impervious to water. Both natural degration processes and cultural practices have been involved in the formation of undesirable physical properties in the heavy textured valley soils...en_US
dc.format.extent2 leaves, vi, 89 p.en_US
dc.format.extent28278847 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.rightsThe reproduction of this thesis has been made available by authority of the copyright owner solely for the purpose of private study and research, and may only be reproduced and copied as permitted by copyright laws or with express written authorization from the copyright owner.en_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleA study of soil structure in Red River soil associates and of modification under cultureen_US
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typemaster thesisen_US
dc.degree.disciplineSoil Scienceen_US


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