62 



THE POPULAR SCIENCE MONTHLY 



ma. 



Pookland Farm : Wheat, 1013. Regular treatment, 35% bushels per acre. 



years of meadow and pasture with clover and timothy. About 4 tons 

 per acre of ground limestone and 2 tons per acre of fine-ground raw rock 

 phosphate have been applied to 37 acres of this field. Two applications 

 have been made of each material; the phosphate was plowed down for 

 the corn crops of 1904 and 1910, and the limestone was applied in the 

 fall and winter of 1904-5 and after the ground was plowed for wheat 

 in the fall of 1912. 



The entire 40-acre field was covered with one uniform application of 

 six loads per acre of farm manure with a 50-bushel spreader. 



A six-rod strip entirely across the field (80 rods) received the same 



