phates after lime has been applied to the soil, since lime aids ^o^d for 

 to set the phosphoric acid tree from its natural insoluble 

 combinations. 77 



Grass seems to demand less phosphoric acid than was 

 applied in the test; but it responds with increasing-profit to 

 applications of Nitrate of Soda up to 350 pounds to the 

 acre when potash and phosphates are present. 



Whole Field, except Center, Fertilized with Fourteen Per Cent. Acid Phosphate, 



Six Hundred Pounds; Sulphate of Potash, Two Hundred Pounds; 



Nitrate of Soda, Two Hundred Pounds. 



Square in Center of Field had Six Hundred Pounds Acid Phosphatej 



and Two Hundred Pounds Sulphate of Potash, but no 



Nitrate of Soda. 



On such soils as that of these plats, the best fertilizer 

 combination for annual application appears to be: 



400 pounds phosphate. 



200 pounds muriate of potash. 



300 pounds Nitrate of Soda. 



No stable manure has been used upon the field under 

 experiment for over twenty years. 



The Bulletins of the Rhode Island Agricultural Experi- 

 ment Station, or Farmers' Bulletin No. 77, published by the 

 United States Department of Agriculture, tells how and 



