Another potentially fruitful line of enquiry relates to the use of soil
descriptors for predictive purposes. Because in many field contexts only
elementary soil survey data can be obtained, and because it is impossible in
any case to use more sophisticated data due to the lack of knowledge about
lesser-known plants, there is a need to know how to get the greatest value
from routine soil analytical data (see Table 1, Level C for examples of the
measurements normally available).