112 HATCH EXPERIMENT STATION. [Jan. 



in the crops as compared with the no-nitrogen plots : nitrate 

 of soda, 100; barnyard manure, 77.8; dried blood, 65.1; 

 sulfate of ammonia, 63.6. 



II. —The relative value of muriate and high-grade sulfate 

 of potash for field crops. The results of this year indicate the 

 sulfate to be superior to the muriate for potatoes. For the 

 soy beans the two salts gave nearly equal yields, while 

 the crops of cabbages and onions were practical failures on 

 both salts, largely, it is believed, because of the unfavorable 

 season. 



III. — A. The relative value of nitrate of soda, sulfate 

 of ammonia, and dried blood, used in connection with ma- 

 nure, as sources of nitrogen for garden crops. The results 

 indicate these materials used in amounts furnishing equal 

 nitrogen to rank for this year in the following order : for the 

 early crops, — including dandelions, strawberries, peas and 

 beets, — dried blood, nitrate of soda, sulfate of ammonia; 

 for the late crops, nitrate of soda ranks first, followed by 

 dried blood and sulfate of ammonia. B. Relative value of 

 sulfate and muriate of potash for garden crops. The results 

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

 strawberries, tomatoes, cucumbers, celery and turnips ; while 

 the muriate has given slightly superior results with dande- 

 lions, peas and beets. 



IV. — The relative value of diflferent potash salts for field 

 crops. The salts under comparison are high-grade sulfate, 

 low-grade sulfate, kainite, nmriate, nitrate, carbonate and 

 silicate. The crop of this year was clover, mixed with tim- 

 othy. As indicated by the yields of clover, the best results 

 were obtained on the high-grade sulfate ; while the silicate, 

 carbonate, low-grade sulfate and nitrate gave results almost 

 as good. The ^deld of timothy was heaviest on the kainite 

 and nmriate. As last year, one of the most striking results 

 of the experiment was the injury to the clover due to potash 

 salts containing chlorine, — especially to the kainite. 



V. — The relative value of phosphates used in quantities 

 furnishing equal phosphoric acid to each plot. The crop of 

 this year was cabbages, and those which gave satisfactory 

 growth and yield in the order of their rank are : dissolved 



