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