1902.] PUBLIC DOCUMENT — No. 33. L3 



indicate sulfate to be superior to the muriate for clovers ; for 

 cabbages, the muriate proves slightly superior. 



III. — A. To determine the relative value of nitrate of 

 soda, sulfate of ammonia and dried blood, used in connec- 

 tion with manure as sources of nitrogen for garden crops. 

 Results indicate these materials used in amounts furnishing 

 equal nitrogen to rank in the following order : nitrate of 

 soda, dried blood, sulfate of ammonia. B. To determine 

 the relative value of sulfate of potash and muriate of potash, 

 used in connection with manures for garden crops. Results 

 of the year indicate the sulfate to be the better for early 

 crops, while for late crops the muriate is equally good. 



IV. — To determine the relative value of different phos- 

 phates used in equal money's worth. The results of the 

 y ear rank the materials employed in the following order : 

 phosphatic slag, South Carolina rock, Mona guano, dissolved 

 bone-black, Florida rock phosphate. 



V. — To determine the relative value of phosphates, applied 

 on the basis of equal quantities of actual phosphoric acid. 

 The relative standing of the several phosphates was in the 

 following order : raw bone, phosphatic slag, South Carolina 

 rock, apatite, dissolved bone meal, dissolved bone-black, 

 Tennessee phosphate, acid phosphate, steamed bone meal, 

 Florida phosphate. 



VI. — To determine the relative value of different potash 

 salts for field crops. The results of the year with wheat 

 and corn are not very decisive, but indicate a high rate of 

 availability for the new materials, — silicate and carbonate 

 of potash. 



VII. — Comparison of different varieties of ensilage corn. 

 In total yield the varieties under trial rank in the following 

 order : Eureka, Boston Market, Rural Thoroughbred, Learn- 

 ing Field. In actual food value the Learning Field when 

 ensiled is superior. 



VIII. — -.1. Soil test with grass. Results of the year 

 indicate the close dependence of grass upon a liberal supply 

 of fertilizer nitrogen, and the still closer dependence of 

 clover upon a liberal supply of fertilizer potash. They also 

 establish the possibility of raising profitable hay crops by 



