The Phosphates of America. 15 



Wt. in Ibs. % Ash. Wt. Ash in Ibs. 



Barley 4,800,000,000 4 . 80 230,400,000 



Rye 2,333,000,000 4.79 111,750,700 



Buckwheat 1,083,000,000 6.15 66,604,500 



Total , 14,712,913,800 



The total weight of ash in the whole cereal production of the 

 country is therefore 



In grain 2,937,357,000 pounds 



In straw 14,712,913,800 



Total 17,650,270,800 



Since it is our intention to limit the scope of this work to phos- 

 phates, we may neglect all other constituents of the above amounts 

 of ash, and confine our attention to the 



QUANTITY OF PHOSPHORIC ACID YEARLY REMOVED FROM THE 

 SOIL IN THE UNITED STATES. 



GRAIN. 



% Phos- Wt. Phosphoric 



Wt. Ash in Ibs. phoric Acid. Acid in Ibs. 



Wheat 556,200,000 46.98 261,302,760 



Maize 1,649,200,000 45.00 742,140,000 



Oats 610,560,000 23.02 140,550,913 



Barley 83,232,000 32.82 27,316,742 



Rye 29,260,000 46.93 13,731,718 



Buckwheat 8, 905, 000 48.67 4, 334, 063 



Total 1,189,376,195 



STRAW. 



% Phos- Wt. Phosphoric 



Wt. Ash in Ibs. phoric Acid. Acid in Ibs. 



Wheat 2,436,798,600 4.81 117,210,012 



Maize 10,363.360,000 12.66 1,312,001,376 



Oats 1,504,000,000 4.69 70,537,600 



Barley 230,400,000 4.48 10,321,920 



Rye 111,750,700 6.46 7,219,095 



Buckwheat. 66,604,500 11.89 7,919,275 



Total 1,525,209,278 



Total weight of the phosphoric acid in grain 1,189,376,195 



Grand total, pounds 2,714,585,473 



The acreage under cultivation for the production of the above 

 cereals is estimated officially as follows : 



