A preliminary survey of the protozoan fauna of Manitoba soils, with a historical review of the subject

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dc.contributor.authorSiemens, Gerhard Johnen_US
dc.date.accessioned2011-06-06T18:11:29Z
dc.date.available2011-06-06T18:11:29Z
dc.date.issued1935-04-01T00:00:00Zen_US
dc.degree.disciplineSoil Scienceen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThe 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.description.noteSpring 1935en_US
dc.format.extent20214267 bytes
dc.format.mimetypeapplication/pdf
dc.identifierocm72804525en_US
dc.identifier.urihttp://hdl.handle.net/1993/4625
dc.language.isoengen_US
dc.rightsopen accessen_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.titleA preliminary survey of the protozoan fauna of Manitoba soils, with a historical review of the subjecten_US
dc.typemaster thesisen_US
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