Manuring and Rotations 91 



could be carried out with some other sod crop, such as 

 clover or grass. In a rotation of this kind the use of 

 manure is usually most effective if applied just previous 

 to the beet crop. In plowing up alfalfa, it is usually bet- 

 ter to plant the land to some crop such as corn or pota- 

 toes for a year before planting beets because of the in- 

 terfering action of the coarse alfalfa crowns. Clover and 

 grass land may often be planted to sugar-beets at once, 

 especially if fall-plowed. 



