20 



CHARACTERISTICS OF AMMONIA SALTS 



and nitrates, found in the various discharges of drainage 

 water, before and after the application of the ammonia salts, 

 is shown in the following Table. 



TABLE I. 



COMPOSITION OF THE DRAINAGE WATER FROM PLOT 15 IN THE 

 ROTHAMSTED WHEAT FlELD, BEFORE AND AFTER THE APPLICA- 

 TION OF AMMONIA SALTS. 



Before the application of Ammonia salts. 



October zoth ... 



None. 



227 



8-2 



After the application of Ammonia salts on October 25. 



In the Rothamsted analyses of drainage water it is the 

 chlorine of the chloride of ammonium which has been deter- 

 mined, if the sulphuric acid of the sulphate of ammonia had 

 been determined a similar series of figures would have been 

 obtained. The course of change in the drainage water is 

 seen to follow the order already described. 



We will give one more illustration from the Rothamsted 

 analyses of drainage waters, relating this time to a spring 

 application of ammonia salts, side by side of a spring applica- 

 tion of nitrate of soda. The manures were all applied as top- 

 dressings to the wheat on Feb. 23, 1882. Plot 8 received 

 600 Ibs. per acre of mixed ammonia salts ; plot 10, 400 Ibs. ; 

 while plot 9, lying between them, received 550 Ibs. of nitrate 

 of soda. The drain-pipes next ran on March ist ; the pipe of 

 one of the plots receiving ammonia salts also ran on April 26th, 

 the other two pipes did not run. The interval of six days 



