The stainless steel hammermill-style soil grinder can process a soil sample in just a few seconds. The 1.5-horsepower electric motor drives the knife assembly at 650 rpm, quickly crushing and homogenizing the soil sample. The hardened steel knives will process several thousand soil samples before the knives need replacement. The soil grinding chamber can grind and homogenize small or large soil samples, holding up to 5-7 lb soil in the grinding chamber. The electric motor may be wired for 115 VAC (13.4 A, 60 Hz, 1-phase) or 230 VAC (6.7 A, 60 Hz, 1-phase) electrical configurations.