368 FIELD CROPS 



is favorable, it is ready to be hulled. Clover seed is seldom 

 stacked, for too much of the seed would be lost in the extra 

 handling. The clover miller is quite similar to the thrash- 

 ing machine, but has an extra set of rasps for rubbing the 

 seed from the hulls. The usual yield is but 1 or 2 bushels 

 to the acre, though 5 bushels are sometimes obtained. The 

 usual price for clover seed in recent years has been from $5 

 to $10 a bushel of 60 pounds, though higher prices are some- 

 times obtained for seed of extra quality. 



465. Place in the Rotation. Clover occupies a prominent 

 place in the rotation throughout the region where it is grown. 

 It usually follows a small grain crop and precedes corn or 

 potatoes. As has previously been stated, it is generally 

 sown with winter wheat or with some one of the spring grains. 

 Where corn is an important crop, the common rotation is 

 wheat, clover, corn or oats, clover, corn, though two crops 

 of corn may be grown in succession, making a four-year 

 rotation. Where potatoes are largely grown, a common 

 rotation is potatoes, oats, clover. Sometimes the clover is 

 left for two years, or two crops of potatoes or one of potatoes 

 and one of corn are grown, making this a four-year instead 

 of a three-year rotation. In any case, clover is depended on 

 to add vegetable matter and nitrogen to the soil. Where it 

 is grown as often as once in three years, this element need 

 not generally be purchased, but potash and phosphorus will 

 have to be added either in commercial fertilizers or barn- 

 yard manure, unless the soil is very rich in these constitu- 

 ents. Best results are usually obtained when the manure is 

 applied to the clover sod before breaking it up for corn. 



466. Enemies of Red Clover. The most common fun- 

 gous diseases which attack the clover plant are leaf spot, 

 rust, stem rot, and root rot. These diseases seldom do 

 serious injury to a vigorous stand, but on poor land or else- 



