MANUS A HAND. 



Ill 



This is to serve as a check or guide in testing the 

 other squares. Square No. i is to have a fertilizer 



No. i. 



No. 2. 



No. 3. 



No. 4. 



No. 5. 



No. 6. 



No. 7. 



No. 9. 



No. 10. 



containing nitrogen and potassium ; No. 3 is to have 

 a fertilizer containing nitrogen only ; No. 4, potassium 

 and phosphorus combined; No. 5, potassium alone; 

 No. 6, nitrogen and phosphorus ; No. 7, phosphorus 

 alone ; No. 8, all three elements combined ; and No. 

 10 is to have calcium only. 



To perform the experiment, fertilizers containing 

 these elements are to be placed on each of the 

 squares, and carefully worked into the soil, about two 

 or three inches deep, before the crop is planted. No 

 rule can be laid down for the amounts to be used, 

 but two bushels on each square will be about a fair 

 quantity. After this each of the ten squares is to be 

 planted with the same seed, at the same time, and 

 carefully cultivated through the entire season, treating 

 all the squares exactly alike. 



