

CHEMICAL MANURES. 65 



may always be replaced by oats. In this case suppress the sulphate 

 of ammonia prescribed for the fifth year, and the total expense will 

 be $54.61, or an annual expense of $10.92. 



As a last example, I will report a succession of six years, in which 

 the chemical fertilizers are first used alone, and but partly associated 

 with manure the second year. 

 The rotation is : 



First year, flax. 



2d year, beets. 



3d year, wheat. 



4th year, colza. 



5th year, wheat. 



6th year, oats, or barley, or rye. * 



I said the first year only chemical fertilizers ought to be used, 

 because their superiority for flax is now beyond question. Flax may 

 be placed between the wheat(which, as you know, requires manure 

 rich in azote) and the legumes, which use only the mineral part of 

 the fertilizer. It therefore succeeds best with chemical fertilizers, 

 because we can then reduce the proportion of azote without inter- 

 fering with the minerals. I have cited to you the result obtained 

 with M. Charee, whose harvest was sold in the field at $66.57 the 

 acre. 



I return to the formulae of fertilizers. 



Succession of Six Years, comprehending Flax, Beets, Wheat, Colza, 

 Wheat, Oats, Rye or Barley. 



First YearFlax. 

 Incomplete fertilizer No. 2, 887 pounds. 



/-> . , . The acre. 



Composition : Quantity. Price. 



Acid phosphate of lime 355 Ibs. $5.40 



Nitrate of potash 177 " 10.47 



Sulphate of lime 355 " .67 



Cost $16.54 



Second Year Beets. 



Manure spread in autumn, 44,444 pounds. 



In the spring : 



Complete fertilizer No. 2 again, 577 pounds. 

 Composition : 



Acid phosphate of lime 177 Ibs. 



Nitrate of potash 88 " 



Nitrate of soda 177 " 



Sulphate of lime 133 ' " 



Cost $14.09 



Third Year Wheat. 

 Sulphate of ammonia 266 Ibs. $11.40 



