Table 1. Estimates of plant and soil properties (mean fraction and 95% confidence intervals) based on measurements of pure and mixed samples.

                 Source of Estimates
                _____________________________
                       #                    &
Property         Direct       Soil-corrected
_____________________________________________
Soil ash        .82 (.01)      .90
 (Ao)

Soil lignin     .040 (.007)    .047
 (Lo)

Shoot ash       .031 (.003)    .026
 (Ap)

Shoot lignin    .059 (.005)    .064 (.007)
 (Lp)
_____________________________________________

# Based on direct measurement of either 100% soil or 100% shoot samples.

& Based on the application of Eq. 6 to data from the 1:9, 2:8, 5:5, and 8:2 soil:shoot mixtures.