The model of soil cover fertility was tested during a long-term field exper
iment based on detailed maps of the soil cover and microrelief of the exper
imental field in the subzone of soddy-podzolic soils. The model includes bo
th geometrical characteristics of the soil cover and yield values for diffe
rent plots. The results proved to depend on the size of plots, number of re
plicates, crop rotation patterns, and the location of particular test micro
plots for yield measurements.