The important aspect of this example is to
demonstrate how management, as opposed to soils and
climate, affects yield, and how differences in management
can be utilized in analyzing results of on-farm trials.
Within locations (the first six "farms" in Table VII-7 are
from one location and the last six from another), the
differences resulted from the way each team planted and
cared for the radishes -- soils and climate were
essentially identical. Between locations, soils differed
somewhat, but climate was similar. For purposes of
partitioning a recommendation domain, all of the first
location could be considered to be in the poorer
environment. But in the other location, half the "farms"
are in the better environment and half in the poorer
environment. An analysis would have to be made to
determine the sources of this difference in order to
define the partitioned recommendation domains.