32 Food for Plants. 



Pounds Per Acre of Essential Fertilizer Ingredients Added to the Sail 



in the Fertilizers Used. 



1919. 



Potash in 

 R;itc of Xitiatc 



Applioation riutephorii' Usid 



P!ot Nos. Table N'o. IV per Acre Nitrogen Acid Estimated 



1. Nitrate of Soda 400 5G . . . . 8 



and 



Acid Phosphate 400 .... 56 8 



2. Nitrate alone 400 5G .... 8 



3. Acid Phosphate alone 40O 5G 



4. Check — nothing . . • • • • • • • • • • 



5. NaNOa and P.O^ 400 each 5G 5G S 



6. NaNOa and P.0= 600 each 84 84 12 



The i)rolit per acre as between the 

 Rate of Profit application of 400 pounds of acid phos- 

 Per Acre. phate alone, and of Nitrate and acid 



phosphate together shows that the 

 added investment in 400 pounds of Nitrate, which may 

 be estimated at practically fourteen dollars ($14), gave 

 a rate of profit of twenty dollars ($20) per acre, valuing 

 ensilage at present at five dollars ($5) a ton. 



Since the rate of yield per acre of the Nitrate and acid 

 phosphate plot was 20.9 tons as against a rate of yield 

 per acre of 14.1 tons for the acid phosphate alone plot, — 

 the value in the first case is placed at one hundred four 

 dollars and fifty cents ($104.50) per acre, and in the lat- 

 \vv case at seventy dollars and fifty cents ($70.50) per 

 acre. As the crop increase from the use of 40O pounds 

 of Nitrate is valued at thirty-four dollars ($34), and the 

 cost of the Nitrate at fourteen dollars ($14), a profit at 

 the rate of twenty dollars ($20) per acre is the result, as 

 above stated. 



These figures are in general in close agreement with 

 those secured in 1918, and confirm the view that rational 

 fertilizing with Nitrate does not appear to exhaust the 

 soil in the net result as much as does doing without 

 fertilizers. 



