than in 1954.
Another possible explanati-n would b= the reduced effect of
ploving on lovweriny the average Sr?0 evel at root depth in successive vears,
The data in Figure 5 indicate that the sampling was surprisingly good,
since the only considerable scatter occurs during the snarp soring rise,
‘he
monitoring of milk from large dairies apgpears to rrovide a good record of nlant
and dairy product activity levels over the ¢roving season for a given ara and
also provides a basis for comparison of the activity of plants and dairy vrodu:t:
from widely scattered areas,
NYOO
S6