122 STORKS AGRICULTURAL EXPERIMENT STATION. 



FIELD EXPERIMENTS WITH FERTILIZERS. 



BY C. S. PHELPS. 



The field experimeuts conducted by the Station during 1901 

 were in continuation of those of preceding years. It has been 

 the polic}' of the Station to repeat these experiments for a 

 number of years on the same sets of plots, making each year's 

 experiments as nearly as possible duplicates of those of the 

 year preceding, in the belief that in this way the value of the 

 results would be increased. The experiments now in progress 

 at the Station include the following: 



1. Special nitrogen experiments on corn, cow peas and soy 

 beans, for the purpose of studying the effects of nitrogen in 

 different quantities and combinations when used as a fertilizer 

 upon the yields and the composition of the crop. 



2. A soil test on the Station land, with a rotation of crops, 

 for the purpose of studying the deficiencies of the soil and the 

 demands of different crops for the various ingredients of fer- 

 tilizers. 



3. An experiment on soil improvement, for the purpose of 

 comparing the relative economy of (i) stable manure, (2) a 

 "complete chemical fertilizer," and (3) green manuring alone 

 and in connection with mineral fertilizers, for improving a soil 

 apparently deficient in organic matter and in nitrogen. 



Accounts of these experiments are given in the annual re- 

 ports of the Station year by year, and from time to time the 

 results of the experiments for a number of years are summar- 

 ized and discussed in detail.* The present report gives a review 

 of the work for 1901. The special nitrogen experiments and 

 the soil test are described in this article; the experiment on soil 

 improvement in the article following. 



* See .Storrs Experiment Station Reports, 1892, p. 67, 1898, p. 113 and 1889, p. 16S. 



