Soil augers and samplers are used in forestry, environmental and agricultural applications, but are not limited to these uses. This equipment is commonly used for obtaining samples at or near the surface. With the use of extensions, augers have the capability to reach depths of up to 15 ft. However, it is recommended to use a power auger for depths greater than 5 ft. Augers can be used for sampling when there is not a need for a clean or undisturbed sample. Generally, augers are used to bore to a depth where a sample is to be obtained using a soil sampler or core sample. Hand-operated augers are made from several materials including steel, aluminum, stainless steel, brass and even wood.