Plants should be pruned before they are set. This is done by cutting off
the tip ends of the roots, causing a callous to form where each root is
cut off. From these callouses, myriads of fine feeding roots start soon
after plants are set.
[Illustration: SIDE VIEW OF SECTION OF A ROW SHOWING PLANTS GROWN
SINGLE-HEDGE SYSTEM]
[Illustration: _Kellogg’s_