subsoil tillage

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• agricultural technology — Introduction       application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation       Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …   Universalium

• Soil structure — is determined by how individual soil granules clump or bind together and aggregate, and therefore, the arrangement of soil pores between them. Soil structure has a major influence on water and air movement, biological activity, root growth and… …   Wikipedia

• Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …   Wikipedia

• North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …   Universalium

• Soil horizon — Soil samples illustrating horizons (subsoil on right) A soil horizon is a specific layer in the land area that is parallel to the soil surface and possesses physical characteristics which differ from the layers above and beneath …   Wikipedia

• Charles Sherwood Noble — (1873 July 5, 1957) invented a minimum disturbance cultivator called the Noble blade. The Noble blade (or Noble plow) cuts weed roots beneath the soil surface without turning the soil over, thus reducing topsoil loss due to wind erosion. The… …   Wikipedia

• Canadian system of soil classification — The Canadian system of soil classification is more closely related to the American system than any other. They differ in several ways. The Canadian system is designed to cover only Canadian soils. The Canadian system dispenses with a sub order… …   Wikipedia

• Auchterhouse —    AUCHTERHOUSE, a parish, in the county of Forfar, 7 miles (N. W. by N.) from Dundee; containing, with the villages of Dronley and Kirkton, 769 inhabitants. This parish, the name of which is of uncertain derivation, is nearly of triangular form …   A Topographical dictionary of Scotland

• Colinton —    COLINTON, a parish, in the county of Edinburgh, including the villages of Hailes Quarry, Juniper Green, Longstone, Slateford, and Swanston; and containing 2195 inhabitants, of whom 120 are in the village of Colinton, 4 miles (S. W.) from… …   A Topographical dictionary of Scotland

• Glenshiel —    GLENSHIEL, a parish, in the county of Ross and Cromarty, 16 miles (S. E.) from Balmacara, in Lochalsh; containing 745 inhabitants. The derivation of the name of Glenshiel is involved in obscurity, the original word being equally applicable to… …   A Topographical dictionary of Scotland

• Kilfinan —    KILFINAN, a parish, in the district of Cowal, county of Argyll, 30 miles (S. S. W.) from Inverary; containing 1816 inhabitants. The name of this place, signifying the church or burial place of Finan, is derived from a saint of the seventh… …   A Topographical dictionary of Scotland