Graduate Thesis Or Dissertation
 

Readily available manganese in some Oregon soils and its relation to certain other soil factors

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nv9356608

Descriptions

Attribute NameValues
Creator
Abstract
  • With agriculture continuing to play an ever-increasing role in our modern economy, more and more attention is being directed toward the hitherto more or less neglected finer points of crop production. In the past it has been the tendency to concentrate research on those factors which most obviously affect agricultural output, but in recent years we have begun to recognize and appre­ciate those influences which are just as important but considerably' more subtle in their effects. Consequently, much greater emphasis is being placed on such factors as the role of minor elements in crop production, and as a result research along these lines bas become an integral part of our agricultural progress. Research during the past two decades bas shown definitely that greater attention to the minor element needs of both soils and crops can, in some instances, result in higher production and better quality. Previous investigations of this problem on Oregon soils have provided a rather complete picture with regard to boron. The status of sine bas received considerable attention also, however these investigations have been limited to certain horticultural crops in a relatively limited area. Except for boron, little is known for most of the soils of Oregon concerning the levels of the minor elements in the soil and in the crops grown on the soil. Stimulated interest in these elements has resulted in the spreading of information of questionable accuracy regarding their use and value. As a result needless applications are commonly made. On the other hand, there may be soils lacking in sufficient amounts of these elements and which would definitely benefit from their addition. Preliminary greenhouse and field trials have indicated that small applications of soluble manganese salts may result in increased yield and quality of small fruits, vegetables, and seed crops on some Oregon soils. These investigations, however, have been limited to a relatively few Western Oregon soil types. Nevertheless, it was felt that these results justified the further investigation of the status of available manganese for a wider range of soils. A fundamental approach to determining the need for further research of this kind on Oregon soils is an accurate and compre­hensive survey designed to point out those soils which may be considered as deficient or might possibly develop a deficiency, as well as those which indicate satisfactory levels. It was to accomplish a survey of this type and to determine, if possible, the relation between available manganese and certain other factors that this study was initiated. The results should help locate areas for further field-trial investigations.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
Replaces

Relationships

Parents:

This work has no parents.

In Collection:

Items

Thumbnail Title Date Uploaded Visibility Actions
file details KirschRichardKneale1954.pdf 2017-08-22 Public Download