-New Yokk Agricultural Experiment Station. 



47 



FIELD EXPERIMENTS. 



The results of carefully conducted field experiments are the most 

 reliable guide we have for fertilizing practice. It is idle to base 

 recommendations in this regard upon theory, hearsay, or personal 

 experience and leave the results of such experiments out of con- 

 sideration. It is important to obtain as complete data as possible 

 regarding the action of fertilizers on the soils within our own state. 

 At the present time we are in need of much more data on this subject; 

 and it is always well to supplement what we have by results from 

 reliable work outside the state. Many important principles brought 

 out in experiments on soils outside the state have extensive appli- 

 cation. 



Ohio experiments. — The following tabulated results taken from 

 publications of the Ohio Agricultural Experiment Station are of 

 the greatest significance. 



Table II. — Effect of Fertilizer Elements and Combinations in Ohio 



Experiments. 



Fertilizing materials and their cost, and total and net value of increase produced 

 for 17 years (1894-1911), all calculated for one rotation of 5 years (Corn, oats, 

 wheat, clover, timothy). Fertilizers divided between corn, oats and wheat. 



