The growing of green crops and catch crops for manurial purposes has become a general practice in many trucking sections. Marked progress in the use of green manures has been made in New Jersey, where, for example, at Freehold, potatoes have been grown annually upon the same land for many successive years by sowing crimson clover, rye or wheat after harvesting each crop of potatoes. It often happens that the continued use of crimson clover year after year results in an accumulation of too much nitrogen for the best results with potatoes and it is necessary to substitute rye or wheat for a year or two. In the poor sandy 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. Growers at Moorestown, Swedesboro, Glassboro and other New Jersey trucking centers employ green manures extensively. 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. Peas 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.