SAMPLING STRATEGIES FOR MYCORRHIZAL RESEARCH

Authors


Summary

Variance components were determined for the percentage of mycorrhiza formation in roots of apple trees (Malus) and the numbers of mycorrhizal spores extracted from the soil environment of trees growing in the field. For spore counts and root infection, variability was least from tree to tree. With both of the commonly used methods of rating percentage infection, variability was greatest between samples. For counting soil-extracted spores, the greatest variation was at the subsample level.

Ancillary