Field Experiments with Fertilizers. 147 



ter utilized. Whatever the reasons may be they will tell upon 

 the results but will make less trouble for us the more careful we 

 are as to everything that we can control. 



It is possible by a careful study of the results to correct some of 

 the discrepancies. A few years ago a German agricultural chem- 

 ist proposed a method for making such corrections by which the 

 results could be evened up and made to show much more clearly 

 what the soil and crop experimented upon require in the way of 

 plant-food. The explanation of this method could not be made 

 clear without illustrations, and such illustrations would be 

 more interesting if drawn from actual experiments carried out in 

 this country. 



The writer of this paper will be glad to correspond with any 

 farmers or horticulturists of this state who are disposed to try this 

 method of field experiments, and answer any questions about the 

 matter, go over the results obtained, apply the corrections accord- 

 ing to the method above mentioned, and finally to issue in 

 another bulletin early next year an account of all the experiments 

 reported to him. G. C. Caldwell. 



