Sampling sugar beet petioles for measurement of soil fertility

[1] BROWN RJ, 1938, SOIL SCI SOC AM P, V2, P185

[2] CAROLUS RL, 1938, VA TRUCK EXP STA B, V98, P1531

[3] GARDNER R, 1935, COLO AGR EXP STA TEC, V14

[4] THORNTON SF, 1936, 204 PURD U AGR EXP S

[5] Plant analysis as a diagnostic procedure [J]. SOIL SCIENCE, 1943, 55 (01) : 101 - 112

[6] ULRICH A, IN PRESS AM SOC SUG

[1] BROWN RJ, 1938, SOIL SCI SOC AM P, V2, P185

[2] CAROLUS RL, 1938, VA TRUCK EXP STA B, V98, P1531

[3] GARDNER R, 1935, COLO AGR EXP STA TEC, V14

[4] THORNTON SF, 1936, 204 PURD U AGR EXP S

[5] Plant analysis as a diagnostic procedure [J]. SOIL SCIENCE, 1943, 55 (01) : 101 - 112

[6] ULRICH A, IN PRESS AM SOC SUG