EXPERIMENTS IN SCOTLAND 



77 



sulphate of ammonia was used in such quantity (about f cwt.) 

 as to supply the same weight of nitrogen. The superphosphate 

 was applied at the rate of 2 cwts. per acre. The potash salt 

 used in 1894 an< ^ l &95 was l cw t- of the commercial "muriate" ; 

 in 1896 and 1897 2 cwts. of kainite were substituted. The 

 cinereal manures, and the sulphate of ammonia, were applied 

 to the land before sowing the seed ; the nitrate of soda was put 

 on as a top-dressing after the plant was up. At the present 

 time we have simply to deal with the return given by the use 

 of ammonia salts. 



As the oats grown were of different kinds, and of different 

 weight per bushel, Professor Wright gives in every case the 

 total weight of corn in pounds, and when bushels are mentioned 

 reckons them as 42 Ibs. in weight. The following table shows 

 the average amount of increase over the unmanured produce 

 obtained each year by the application of the ammoniacal 

 manures. 



TABLE XXIII. 

 INCREASE OF OAT CROP ox SCOTCH FARMS BY VARIOUS MANURES. 



The average results at the foot of the table relate only to 

 the three years in which all the ammoniacal manures were 

 employed. 



\Ye have to recollect that not only the character of the 

 season differed in each year, but also, to a very considerable 

 extent, the localities on which the experiments were made ; 



