A certain depth beneath the surface of the ground

air dust near the ground

bearing c apacity of the ground

bearing capacity of the ground

cage on the ground

casting off the ground

consolidates the ground

displacement of the ground surface

down to the Ground

Drip Irrigation Under the Ground Surface

electric field on the ground

Energy budget on the ground surface

equipment conneted the ground

flying height above the ground

gill over the ground

gill-over-the-ground

lifting the ground

load on the ground

management of the ground water resources

Meteorological element close to the ground