THE PRODUCE XOT IX PROPORTIOX TO THE MAXURE. 209 



Increase bi/ farm-yard manure over unmanured plots. (Sec p. 190.) 



Here, again, Avliat strikes us first is that the returns 

 from all the fields were different from one another, and 

 that apparently they did not bear the most remote rela- 

 tion to the quantity of manure applied. 



Nothing can be more certain than the fact that a field, 

 exhausted by cultivation, will yield larger returns if 

 di'essed with farm-yard manure than if unmanured : now, 

 taking the increase to be caused by manure, it is natural 

 to suppose that the same quantity of manure would pro- 

 duce the same increase upon different fields. The follow- 

 ing table, however, shows that the same quantity of 

 manure, upon the Saxon fields, produced results which 

 differed very considerably. 



One hundred cwt. of farm-yard manure gave increased produce. 



* The clover crop failed from excessive wet, 

 P 



