Composition of soil as affected by different cropping systems

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Composition of soil as affected by different cropping systems

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/15510

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dc.contributor.advisor Trowbridge, P. F. (Perry Fox), 1866-1937
dc.contributor.author Lowry, Marion Wayne en
dc.date.accessioned 2012-09-25T21:08:02Z
dc.date.available 2012-09-25T21:08:02Z
dc.date.issued 1913
dc.identifier.uri http://hdl.handle.net/10355/15510
dc.description Approved, P.F. Trowbridge
dc.description "Approved, James A Gibson"
dc.description Typescript
dc.description Includes bibliographical references
dc.description M.A. University of Missouri 1913
dc.description.abstract Among the experiments in soil fertility which are being carried out by the University of Missouri College of Agriculture is a series of plot experiments which have been in progress since 1889. There are thirty-nine plots in the field and each has received a definite treatment during this time, the aim being to compare the effect of rotations with continuous single crops, both with and without fertilizer, and to compare the effect of commercial fertilizers with that of barnyard manure. Some striking differences in yields have been obtained but no effort had been made to investigate the changes produced in the composition of the soil until 1909, when Dr. L.D. Haigh took samples from a series of the plots and determined the hygroscopic moisture, total nitrogen and acidity. The humus, total phosphoric acid and the phosphoric acid soluble in N/5 HC1, total potassium, calcium, magnesium and the lime requirement by the Veitch method have since been determined on these samples and these data, as well as the determinations made by Dr. Haigh, are presented in the following thesis. For the present study, eleven plots from the experimental field and the uncultivated soil were selected. The plots are one thirteenth of an acre in size and each has been receiving the given treatment for twenty-one years previous to the time the samples were taken. One plot has been continuously in wheat and has received chemical fertilizers. On four others, two systems of rotation have been carried out with and without manure. On the remaining six, single crops - corn, oats and timothy - have been grown with and without manure.
dc.format.extent 48 leaves
dc.language.iso en_US en_US
dc.publisher University of Missouri
dc.relation.ispartof Theses and Dissertations (MU)
dc.subject.lcsh Soils -- Composition
dc.subject.lcsh Cropping systems
dc.subject.lcsh Farm manure
dc.subject.lcsh Fertilizers
dc.subject.lcsh Crops
dc.title Composition of soil as affected by different cropping systems en
dc.type Thesis
thesis.degree.discipline Agricultural chemistry
thesis.degree.grantor University of Missouri
thesis.degree.name Masters
thesis.degree.level M.A.
dc.identifier.merlin b24654589
dc.identifier.oclc 25972616
dc.description.digitization Digitized at the University of Missouri--Columbia MU Libraries Digitization Lab in 2011.
dc.relation.ispartofcommunity University of Missouri-Columbia. Libraries. MU Libraries Locally Digitized Materials


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