152 ELEMENTS OF AGRICULTURE 



tenth acre each, taking care to have the plots as uniform as possible. 

 Treat the plots as follows: 



Plot 1. Nothing, check. 



Plot 2. Nitrate of soda, at the rate of 160 pounds per acre, 



4 pounds for one-fortieth acre, etc. 

 Plot 3. Acid phosphate, 320 pounds per acre. 

 Plot 4. Nothing, check. 



Plot 5. Muriate of potash, 80 pounds per acre. 

 Plot 6. Nitrate of soda, 160 pounds; acid phosphate, 320 pounds. 

 Plot 7. Nothing, check. 

 Plot 8. Nitrate of soda, 160 pounds; muriate of potash, 80 



pounds. 

 Plot 9. Muriate of potash, 80 pounds; acid phosphate, 320 



pounds. 



Plot 10. Nothing, check. 

 Plot 11. Nitrate of soda, 160 pounds; acid phosphate, 320 pounds. 



muriate of potash, 80 pounds. 



Plot 12. Barnyard manure, 10 loads or tons per acre. 

 Plot 13. Nothing, check. 



If there is not room for so many plots, the first five may be omitted. 

 Raise a crop of corn, cotton or potatoes according to the region. In 

 the fall, harvest and weigh the crop, in order to see which fertilizer is 

 most profitable./ 



If the school does not have land available for such an experiment, 

 some farmer nearby will probably furnish it. Correspond with the 

 State Experiment Station, and an experiment better adapted to the 

 community r^ay be arranged for. 



COLLATERAL READING 



Commercial Fertilizers, Farmers' Bulletin, No. 44. 



Barnyard Manure, Farmers' Bulletin No. 192. 



Home Mixing of Fertilizers. Farmers' Bulletin No. 222, pp. 5-9; 

 No. 225, pp. 7, 8. 



Lime and Clover. Farmers' Bulletin No. 237, pp. 5, 6. 



Use of Commercial Fertilizers. Farmers' Bulletin No. 259, pp. 56. 



Leguminous Crops for Green-Manuring. Farmers' Bulletin No. 278 



Renovation of Worn-out Soils. Farmers' Bulletin No. 245. 



The Conservation of Natural Resources. Farmers' Bulletin, No 

 327. 



