CHAPTER XVI 
THE CABBAGE TRIBE 
SEVERAL members of the mustard family (Cru- 
cifere) of the cabbage kind are useful forage 
plants, and their cultivation seems to be increas- 
ing. In general feeding practice they may be 
compared with root-crops. In fact, kohlrabi is 
often classed with root- crops, and well it may be, 
since it is very closely allied to the turnips and 
rutabagas, differing chiefly in having the thickened 
part above ground rather than below ground. The 
leading cabbage-like forage plants are rape, cab- 
bage and kohlrabi. The kales are not much grown 
for forage in North America. Their culture does 
not differ greatly from that of rape. Thousand- 
headed kale is the kind mostly reeommended, but 
it does not appear to have any advantage over 
rape for forage. 
RAPE 
As a forage plant rape is a recent introduction 
into the United States. Several varieties have 
long been grown in Europe and other countries 
for forage purposes. Of the various kinds, but 
two are generally grown,—Dwarf (Dwarf Essex) 
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