216 CROPS GROWN IN ROTATION 



of farmyard manure or its equivalent dmnng the rotation. The 

 losses of phosphoric acid and potash would be similarly made 

 up, though it is well also to use about 50 lb. of phosphoric 

 acid per acre for the Swede crop, which is specially dependent 

 on a large quantity of available phosphoric acid. 



References 



" Rotation of Crops." Jour. Ttoy. Ag. Soc, 55 (1894), 5S5. Rothamsted Memoirs, 

 Vol. VII., No. 7. 



