124 HATCH EXPERIMENT STATION. [Jan. 



different on these two potash salts, the yields on the sulfate 

 being greatly superior to those on the muriate. The potash 

 salts are applied in such quantities as to furnish potash at 

 the rate of 120 pounds per acre, which requires the use of 

 about 240 pounds of commercial muriate or high-grade sul- 

 fate of potash. Dissolved bone-black is used on all plots as 

 the source of phosphoric acid, and in such quantity as to 

 furnish phosphoric acid at the rate of about 50.4 pounds per 

 acre. To furnish this, dissolved bone-black is applied at the 

 rate of about 320 pounds per acre. 



The results previous to this year may be summarized as in 

 our last annual report. For the early crops, i.e., the crops 

 making most of their growth before mid-summer, including 

 onions, lettuce, table beets, garden peas, spinach, early cab- 

 bages and strawberries, the nitrate of soda has been found 

 the most effective source of nitrogen. The relative standing 

 of the different nitrogen fertilizers, as measured by the total 

 yields, including leaves, vines and tops as well as the mar- 

 ketable product, is as follows : — 



Per Cent. 

 Nitrate of soda, ....... 100.00 



Dried blood, 93.70 



Sulfate of ammonia, ...... 57.30 



For the late crops, including late cabbages, turnips, cel- 

 ery, tomatoes and squashes : — 



Per Cent. 

 Nitrate of soda, ....... 100.00 



Dried blood 99.00 



Sulfate of ammonia, ...... 78.40 



The crops grown in this experiment this A'^ear for which 

 results will be reported include strawberries, followed by 

 celery ; dandelions, followed by cucumbers ; tomatoes ; beets ; 

 and garden peas, followed by turnips. The weather condi- 

 tions have been hio-hly unfavorable to the normal orowtli 

 and development of some of these crops, especially tomatoes, 

 but a small proportion of which ripened, and cucumbers. 

 The excessively dry weather of the month of May, followed 

 by the equally excessively wet weather of the month of June, 

 gave us conditions no doubt extremel}^ unfavorable to the 



