HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Rust, R. H. Articles by Fenton, T. E. Search for Related Content PubMed Articles by Rust, R. H. Articles by Fenton, T. E. Agricola Articles by Rust, R. H. Articles by Fenton, T. E.

Interlaboratory Comparison of Soil Characterization Data—North Central States¹

ABSTRACT

In a study initiated in 1977, eight laboratories representing experiment stations of the North Central Region plus the USDA-SCS National Soil Survey Laboratory determined some of the most common soil properties used for classification and other purposes. Ten horizon samples were selected from soils throughout the region with the intent to include a variety of differences in physical and chemical properties. Estimates of the standard deviation from the mean of physical and chemical properties were derived. There were no significant differences among laboratories in the determination of Ca, Na, base saturation, available P, and CaCO₃ equivalent but there were significant differences in determination of Mg, K, H, cation exchange capacity, organic carbon, and pH in water and in CaCl₂. These differences suggest that uniformity in procedures among laboratories must be emphasized.

¹ Contribution from Minnesota Agric. Exp. Stn., University of Minnesota, St. Paul, MN 55108. Scientific Journal Paper no. 121.16.

² Professor, Dep. Soil Sci., Univ. of Minnesota, and Professor, Dep. Agron., Iowa State Univ.

Received for publication March 11, 1982. Accepted for publication February 4, 1983.