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32 



Food for On plot No. I, where all the Nitrogen was in one form 



^'^"^^ — Nitrate of Soda — the largest yield was obtained, being 35 

 bushels per acre more than on plot No. 2, where the 

 Nitrogen was in an organic form, and 15 bushels more than 

 on plot No. 3, where two forms of Nitrogen were used. 

 It will also be noticed that potash and phosphoric acid 

 without Nitrogen only increased the yield 15 bushels per 

 acre, while with Nitrate the increase was 190 bushels per 

 acre. 



• . The land is first marked and a furrower 



^ ... n run along the rows, making a furrow about 



Fertilizers for r • u j t ^u- r ^u r ^• 



p four inches deep. In this rurrow the ferti- 



lizer is applied, either by hand or with a 

 distributor, and well mixed with the soil. This is best done 

 by running a cultivator along the row ; or when a distributor 

 is used, an attachment in the form of a small cultivator can 

 be made to do the work at one operation. The potatoes 

 are then dropped in the furrow and covered. If it is 

 thought best to cultivate both ways, the land can be marked 

 across the furrows after the fertilizer is applied. 



r-^ W71- /^ Theoretically a given quantity of Ni- 



On What Crops n j & . ^ ' ^ r j 



CK iH M- t ^'"^^^ w^l^ produce a given amount or dry 



onOUlQ 1 1 Itrate , • » nm n 4. 



, ., , substance in a plant. i he smaller amount 



of dry matter a plant contains the greater 

 will be the increase in weight of crop from a given quantity 

 of Nitrate. This is true in nearly all cases. Compare, for 

 instance, wheat and cabbage ; a ton of wheat, straw and grain 

 together contain about 1,500 pounds of dry matter, of which 

 25 pounds is Nitrogen. To produce a ton of wheat and 

 straw together would require, therefore, 170 pounds of 

 Nitrate of Soda, which quantity would contain 25 pounds of 

 Nitrogen 



A ton of cabbage, on the other hand, contains only 240 

 pounds of dry matter, of which about 41^^ pounds is Nitro- I 



gen. To produce a ton of cabbage, therefore, would 1 



require 28 pounds of Nitrate of Soda. As cabbage sells 

 often for about half as much per pound as wheat, there is 

 evidently much more profit to be derived from the use of 

 Nitrate on this crop than on Wheat and in practical ex- 

 perience this is so. All crops that contain a large amount 

 of water and sell for comparatively high prices considering 

 the small amount of dry matter they contain, yield the 



