54 
VEGETABLE GARDENING 
or wheat for a year or two. In the poor sand)'- soils of 
south Jersey, the land, after being cleared, is brought into 
a productive condition by sowing cowpeas in the early 
spring as soon' as ground and weather are sufficiently 
warm, following with crimson clover plowed down the 
next spring after it has made considerable growth. Grow- 
ers at Moorestown, Swedesboro, Glassboro and other 
New Jersey trucking centers employ green manures ex- 
tensively. Crimson clover is the favorite crop for this 
purpose, but if the season is too far advanced to give it 
a good start before cold weather, rye is substituted. Teas 
and beans are also grown, and after the green pods have 
been picked and marketed the plants are plowed under. 
Throughout the North clover sods are largely depended 
upon, while crimson clover and cowpeas are popular 
southward. 
93. The selection of crop. — In the selection of crops for 
manurial purposes the following factors should be consid- 
ered : (1) Adaptation to climate; (2) adaptation to soil; 
(3) character of plant — whether a legume or a non- 
legume ; (4) the amount of vegetable matter produced ; 
(5) adaptation to system of cropping; (6) rapidity of 
growth; (7) character of root growth; (8) hardiness; 
(9) ease of incorporation with the soil. 
94. Red clover. — In the North, red clover is excellent 
to sow after the removal of the July or the early August 
truck crops. The surface of the soil should be made very 
fine and a firm seed bed established, and not less than 12 
pounds of seed should be sown to the acre. The crop 
may be plowed down late the following spring before 
planting late cabbage and many other vegetables for fall 
and winter markets ; or it may be mowed once and the 
second crop plowed down late in the fall preparatory to 
starting crops early the next spring. 
95. Mammoth clover is practically an annual, which 
makes a larger and more vigorous growth than red 
