Note 113 — Chapter XI · THE ORGANIC CONSTITUENTS OF THE SOIL SOLUTION.
Reading edition
Some factors in soil fertility, by Oswald Schreiner and Howard S. Reed, Bull. No. 40, Bureau of Soils, U. S. Dept. Agriculture, 1907.
Reading edition
Some factors in soil fertility, by Oswald Schreiner and Howard S. Reed, Bull. No. 40, Bureau of Soils, U. S. Dept. Agriculture, 1907.