A HAMMER-DRIVEN SOIL-CORE SAMPLER

[1] BAVER LD, 1940, SOIL PHYSICS

[2] KELLEY OJ, 1948, SOIL SCI SOC AM P, V12, P85

[3] APPARATUS FOR COLLECTING UNDISTURBED SOIL SAMPLES [J]. SOIL SCIENCE, 1947, 64 (05) : 399 - 401

[4] SNEDECOR GW, 1946, STATISTICAL METHODS

[5] An improved soil-sampling tube [J]. SOIL SCIENCE, 1929, 27 (02) : 147 - 152

[6] WARD HS, 1948, AUBURN STATIS C SOCI, P52

[1] BAVER LD, 1940, SOIL PHYSICS

[2] KELLEY OJ, 1948, SOIL SCI SOC AM P, V12, P85

[3] APPARATUS FOR COLLECTING UNDISTURBED SOIL SAMPLES [J]. SOIL SCIENCE, 1947, 64 (05) : 399 - 401

[4] SNEDECOR GW, 1946, STATISTICAL METHODS

[5] An improved soil-sampling tube [J]. SOIL SCIENCE, 1929, 27 (02) : 147 - 152

[6] WARD HS, 1948, AUBURN STATIS C SOCI, P52