EOTATION OF CROPS 51 



ture followed the hay and was merely another 

 crop gathered from the same planting. The 

 one-crop system belongs in the farm scrap-heap. 



For planning a system of crop rotation the 

 farmer has need of a degree of intelligence that 

 is not often let loose in this world. He must 

 take the attitude that everybody is mostly right 

 but a little wrong. His neighbors have had the 

 practical experience with the local conditions, 

 while the scientists have collected a vast 

 amount of knowledge unknown to the average 

 farmer. A judicious blending of the two is pre- 

 sumably the best. But it is very risky to believe 

 the system in any region to be radically wrong. 

 The farm practice in Chester County, Pennsyl- 

 vania, has not changed materially in a century 

 and a quarter, and the experts have no radical 

 changes to suggest to the farmers in that region 

 to-day. 



I went straight to my farm from a four 

 weeks ' course at an agricultural college. If ever 

 a smattering of knowledge is a dangerous pos- 

 session it is in farming. I looked at the milk 

 pails of the old owner, who had run the place 



