RELATION BETWEEN POTASH IN SOILS AND THAT EXTRACTED BY PLANTS

HESTER JB, 1935, AM SOC AGRON, P73

MORGAN MF, 1935, CONN AGR EXP STA B, V372

SMITH F. B., 1933, JOUR AMER SOC AGRON, V25, P383

SPURWAY CH, 1933, MICH AGR EXP STA TEC, V132

THORNTON SF, 1934, 204 PURD U AGR EXP C

VOLK N. J., 1941, JOUR AMER SOC AGRON, V33, P684

VOLK NJ, 1942, J AM SOC AGRON, V34, P184

HESTER JB, 1935, AM SOC AGRON, P73

MORGAN MF, 1935, CONN AGR EXP STA B, V372

SMITH F. B., 1933, JOUR AMER SOC AGRON, V25, P383

SPURWAY CH, 1933, MICH AGR EXP STA TEC, V132

THORNTON SF, 1934, 204 PURD U AGR EXP C

VOLK N. J., 1941, JOUR AMER SOC AGRON, V33, P684

VOLK NJ, 1942, J AM SOC AGRON, V34, P184