

AND THE NITRATES ON GRASS CUT FOR HAY. 195 



cation of muriate of ammonia to other portions of the same 

 fields : 



Sown Six years Thirty years 



old lea. old lea. 



Nothing gave . . . 41| cwt. 22<| cwt. 27 J cwt. 

 Sulphate of ammonia, 2 cwt. 76 J ... 40 ... 40 ... 

 Muriate of ammonia, 2 cwt. 72 ... 48^ ... 38 ... 



In all these cases also the increase was large, and especially 

 so in the sown grasses, On the whole, the equal weights of 

 sulphate and muriate of ammonia may be said to have produced 

 nearly equal effects ; though, on looking back to page 100, it 

 will be seen that the equivalent weights of these two salts are 

 such that 67 Ib. of muriate ought to produce as great an effect 

 as 94 Ib. of sulphate, supposing the acids they respectively con- 

 tain to exercise no special or peculiar action on the growth of 

 grass. 



c I quote only one other experiment made at the Mill of 

 Laithers, in Aberdeenshire : 



Nothing gave . . . . . 140 stones of hay. 

 Sulphate of ammonia, 2 cwt. . 173^ 

 Nitrate of soda, Ij cwt. . . . 163 



It will appear from all the results I have inserted in this 

 section, and which are not selected to prove any view of my 

 own, but are introduced simply as they have come to my hands, 

 that the sulphate of ammonia, skilfully and prudently used, may, 

 in the hands of the intelligent and enlightened farmer, prove a 

 means of considerably augmenting his ordinary profits. 



5. Results of experiments with muriate of ammonia, (sal 

 ammoniac.} 



In the preceding section I have given the results of certain 

 comparative experiments with the sulphate and muriate of 

 ammonia. I refer the reader to these results of the application 

 of the muriate, and introduce here a few others only. 



1. To wheat. Mr Fleming, of Barochan, obtained from a 

 small application only a small increase of grain. Thus 



No dressing gave ... 25 bushels, each 61 Ib. 

 Sal-ammoniac, 20 Ib. . . 26! 62 .. 



