68 



RESULTS WITH BARLEY 



TABLE XVII. 



PRODUCE OF BARLEY BY VARIOUS MANURES AT CIRENCESTER. 

 AVERAGE OF Six YEARS, 1885-90. 



The amount of produce is low on all the plots, including 

 the one receiving 14 tons of dung. 



The return for the ammonia applied is distinctly less than 

 that obtained at Rothamsted and Woburn, being only 7-6 

 bushels of barley for i cwt. of sulphate of ammonia. The most 

 striking result is the absence of effect from the cinereal manures. 

 The sulphate of ammonia applied alone gives only one bushel 

 of corn less produce than when phosphates and potash were 

 added to it. This fact emphasizes the statement already made, 

 that every farmer must ascertain for himself whether phos- 

 phates or potash are needed on his own land. 



5. Influence of Ammonia on the Quality of Barley. 

 The employment of ammonia salts as a manure for barley 

 is shown both by the Rothamsted and Woburn experiments 

 to considerably increase the proportion of straw, and the pro- 

 portion of straw rises with each addition to the quantity of 

 the ammonia. With 200 Ibs. of ammonia salts per acre, the 

 proportion of straw to corn has been at Rothamsted very 

 similar to that yielded by the annual application of 14 tons of 

 farmyard manure. 



The weight per bushel of the barley is distinctly increased 

 when ammonia salts in moderate quantity, with a full supply 

 of ash constituents, are employed. At Rothamsted, the average 



