Show simple item record Siemens, Gerhard John en_US 2011-06-06T18:11:29Z 2011-06-06T18:11:29Z 1935-04-01T00:00:00Z en_US
dc.identifier ocm72804525 en_US
dc.description.abstract The results are given of an examination of 128 different soils from 30 different localities of cultivated and virgin land of Manitoba, made during the months of October, 1933 to June, 1934. The results are based upon the microscopic observations of the 128 soils and of cultures of them, during a period of two months each; also upon chemical tests of these soils. An attempt has been made, firstly to determine which species constitute the protozoan fauna of Manitoba soils, and the extent to which variations in soil type and soil texture cause changes in this fauna; secondly, to detect the influence of such factors as hydrogen ion concentration, soil depth and variations in amount of precipitation upon the kind and abundance of protozoa; thirdly to determine the effects of various natural and artificial fertilizers applied to soils on Manitoba Agricultural College farm plots. Thirty species of protozoa were identified. None of the Actinopoda, Testaceous Rhizopoda, Cryptonionadinae nor Hetero- and Oligo-tricha were found. In every soil tested the hydrogen ion concentration decreased with increase in depth. Also the protozoan population decreased with increase in depth and was absent at 36 inches... en_US
dc.format.extent 20214267 bytes
dc.format.mimetype application/pdf
dc.language en en_US
dc.language.iso en_US
dc.rights The 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.rights info:eu-repo/semantics/openAccess
dc.title A preliminary survey of the protozoan fauna of Manitoba soils, with a historical review of the subject en_US
dc.type info:eu-repo/semantics/masterThesis
dc.type master thesis en_US Soil Science en_US Master of Science (M.Sc.) en_US
dc.description.note Spring 1935 en_US

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