Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Porosity and Pore-Size Distribution of Soil Aggregates.
Author Li, Shen-maw ;
CORP Author Minnesota Univ., Minneapolis. Water Resources Research Center.
Year Published 1971
Report Number WRRC-Bull-29; OWRR-A-002-MINN; 08663,; A-006-Minn(3)
Stock Number PB-199 836
Additional Subjects ( Soil aggregates ; Porosity) ; ( Soil water ; Water storage) ; Particle size ; Soil structure ; Cultivation ; Plant growth ; Porosimeters ; Aeration ; Theses ;
Library Call Number Additional Info Location Last
NTIS  PB-199 836 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 39p
Differences in aggregate porosity due to soil type, aggregate size and cultivation condition were investigated using samples from 6 Minnesota soils. Porosity characteristics were determined by the glassbead displacement and thin section methods and with Hg-porosimeter measurements. Aggregate porosity was higher in soils developed on loess and lower in those on till. Porosities ranged from 0.253 to 0.497. Aggregate porosity of virgin soil was higher than that of cultivated soil. Specific pore volume of pores of diameters 0.012 to 17 microns ranged from 0.124 to 0.272 cc/g. Over 90% of the specific pore volume was contributed by pores of diameter greater than 0.2 microns. The proportion of intraaggregate porosity to the total porosity was found to be about 0.30 for cultivated soils and 0.30 to 0.40 for virgin soils. (WRSIC Abstract)