474 
VEGETABLE GARDENING 
688. Examples. — It is common for truck crops to be 
included in a three or four-year rotation with general 
farm crops. Sweet corn, cucumbers, squashes, early and 
late cabbage or cauliflower often follow clover in either 
a three or four-year rotation which, in the North, fre- 
quently includes wheat. In trucking districts, where 
the general farm crops are not grown to any consider- 
able extent, the practice varies considerably. When 
climatic conditions permit, a winter cover crop should be 
started on all cultivated areas (unless a cash crop, as 
spinach or cabbage, is to be planted in the fall and mar- 
keted in the spring), and this will be valuable from the 
standpoint of rotation. 
