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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

direct method of aggregate analysis of soils and a study of the physical nature of erosion losses  [1936]

Yoder, R.E.;

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1. The inherent weaknesses of the elutriation method of aggregate analysis are pointed out and the use of this method of aggregate analysis is questioned. 2. A mechanism is suggested to account for the slaking reaction of soils in the presence of excess water. 3. A direct method, with suitable apparatus for determining the water stable aggregate distribution in soils, is reported. 4. Several soils of the Cecil series with widely varying clay contents were found to have similar distribution of water stable aggregates. 5. Soils from different senses were found to be characterized by different distributions of water stable aggregates. 6. The physical nature of the erosion process was studied on carefully controlled field plats of Cecil clay located on several slopes. The losses from this strongly aggregated soil occurred primarily in the form of water stable aggregates. 7. Data are presented which show the effectiveness of winter legumes in controlling sheet erosion losses. The manner in which this type of "vegetative control" functions is reviewed. 8. Results on the use of various widths of strip crop for controlling sheet erosion are presented. The basic weakness of this type of "vegetative control" practice is pointed out.
From the journal
Journal of the American Society of Agronomy
ISSN : 0002-1962

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
28
Issue:
5
Start Page:
337
End Page:
351
All titles:
"direct method of aggregate analysis of soils and a study of the physical nature of erosion losses"@eng
Other:
"Includes references."
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
28
Issue:
5
Start Page:
337
End Page:
351
All titles:
"direct method of aggregate analysis of soils and a study of the physical nature of erosion losses"@eng
Other:
"Includes references."