112 The Potato 



should be sown alone, or another mixture. This might 

 be red and alsike clover, the clovers with timothy or both 

 timothy and redtop, or perhaps on some of the poorer 

 volusia soils and others of that low grade of fertility, red 

 clover is best left out unless limed and only alsike, timothy 

 and redtop sown. 



In southern sections there is difficulty in growing the 

 northern hay plants mentioned. Reliance must be placed 

 on annuals for most of the hay a;nd for cover-crops. 

 Crimson clover, wheat, rye, winter oats, hairy vetch, soy- 

 beans, cowpeas, peanuts and velvet beans are used in the 

 southern states for these purposes. 



In the West where irrigation is practiced, alfalfa is 

 used more than any other crop to rotate with potatoes to 

 supply organic matter. Field peas are also used. 



REFERENCES 



Agee. Crops and Methods for Soil Improvement. 



Brooks. Agriculture, Vol. I, Soils. 



Eraser. The Potato. 



Grubb and Guilford. The Potato. 



Terry. The A. B. C. of Potato Culture. 



Bui. 87, Bur. PI. Ind., U. S. Dept. Agr. Authority for " Critical 



Period," p. 96. 

 Bui. 49, Can. Central Exp. Farms, Effect of Heat on Seed Vitality. 

 Buls. 347, 352, 397 N. Y. (Geneva) Exp. Sta., and Bui. 159, Vt. 



Exp. Sta., On Effect of Spraying in Dry Season. 



