The figures given above are always used in fixing the Food ' or 



price for new tenants. In this country no such careful esti- Plants 



mates have been made, but the proportions probably vary 22 5 

 but little from those in other countries. 



Amounts of Nitrogen, Phosphoric Acid, and 



Potash Found Profitable for Different 



Crops Under Average Conditions 



Per Acre. 



(TAKEN CHIEFLY FROM NEW JERSEY EXPERIMENT STATION'S REPORTS.) 



Phosphoric 



Nitrogen, Acid, Potash, 



Pounds. Pounds, Pounds. 



Wheat, rye, oats, corn 16 40 30 



Potatoes and root crops 20 25 40 



Clover, beans, peas and other leguminous crops . . 40 60 



Fruit trees and small fruits 25 40 75 



General garden produce 30 40 60 



Rotation on Crops. 



In the changed conditions of agriculture elaborate sys- 

 tems of crop rotation are no longer necessary. With the 

 help of chemical manures and the judicious use of renovating 

 crops farmers are no longer subject to rigid rule, but may 

 adapt rotations to the varying demands of local market condi- 

 tions. 



Some American Rotations. 



1. Potatoes. i. Potatoes. 



2. Wheat. 2. Wheat. 



3. Clover. 3. Grass, timothy and clover. 



4. Clover. 4. Grass, timothy and clover. 



5. Wheat, oats or rye. 5. Corn. 



1. Roots. i. Roots. 



2. Wheat. 2. Wheat. 



3. Clover. 3. Clover. 



4. Clover. 4. Clover. 



5. Corn, oats or rye. 5. Wheat. 



6. Oats. 



