METHOD OF DIGGING HOLES IN LOOSE SOILS Russian patent published in 2013 - IPC A01B1/00 A01C5/04 

FIELD: agriculture.

SUBSTANCE: method is characterised in the fact that the device is twisted in the ground or soil to the desired depth. The device consists of dual hollow tubes. The outer tube has equally spaced protrusions of uniform rectangular section rigidly fixed along the lateral cylindrical surface along the helical line with a constant pitch. After the device reaches the desired depth, water is poured into the hollow space of the inner tube. The water, while being filtered, moistens all the ground which is inside and changes its physical and mechanical properties, then the inner tube together with the loose soil is taken out to form a hollow space. A pole is placed into the hollow space and the outer tube is twisted out. The device is twisted using a handle.

EFFECT: method enables to reduce the physical load in digging holes in loose soils and to increase productivity.