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An Accurate and Efficient Method for Sorting Biomass Extracted from Soil Cores Using Point-Intercept Sampling

^a Ecosystem Sciences Division, 151 Hilgard Hall, Univ. of California, Berkeley, CA 94720 USA. R.C. Wenk currently at Dep. of Botany, California Academy of Sciences, 875 Howard St., San Francisco, CA 94103 USA
^b Agronomy Dep., Univ. of Wisconsin, 1575 Linden Dr., Madison, WI 53706 USA

View larger version (34K): [in a new window]   Fig. 1. Scatterplots of the actual hand-sorted biomass (aHS) and the predicted hand-sorted biomass (pHS) using models developed from original data. Solid lines indicate 1:1 and dotted lines the ordinary least squares (OLS) bisector regression line. Ordinary least squares bisector slope estimates (along with their bootstrapped 95% confidence intervals) were used to validate models.