37 



and 1897 this field was not cultivated, and in 1898 the 

 crop was oats. 



Under all conditions acid phosphate was highly profit- 

 able, the average increase attributable to phosphate be- 

 ing 434 pounds per acre. Cotton seed meal was gener- 

 ally profitable, but not to the same extent as phosphate. 

 Kainit was not needed. By far the larger profit was ob- 

 tained on the plot containing both acid phosphate and 

 cotton seed meal. 



Mr. Troyer also conducted an experiment in 1900 oq 

 similar soil, the results of which were entirely incon- 

 clusive. They may be found in the table on page 52 . 



In 1900 he also tested the most promising combina- 

 tions of fertilizers on an adjoining farm, on very sandy 



soil. 



The fertilizer for this last test was not furnished by 

 the Experiment Station and a detailed report of the 

 amounts of fertilizer used is not at hand. 



The following is Mr. Troyer's statement of the in- 

 crease in yield in 1900 on his sandy soil, where the un- 

 fertilized land yielded 384 pounds of seed cotton per 

 acre : 



Increase per acre in 



lbs. seed cotton. Net profit. 



Cotton seed meal 144 |2.40 



Acid phosphate 48 .16 



Kainit 112 2.88 



Cotton seed meal and phosphate . . . 176 1 . 76 



Cotton seed meal, phosphate 



and kainit 320 5.28 



Apparently on this sandier soil a complete fertilizer 

 was needed, kainit, as well as other materials, yielding a 

 profit. 



4-113 



