Page:Popular Science Monthly Volume 84.djvu/66

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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