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optimum water content

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  • Optimum water content for tillage — The optimum water content for tillage (OPT) is defined as the moisture content of soil at which tillage produces the largest number of small aggregates. Contents 1 Overview 2 Relationships between water content at field capacity (FC) and Plastic… …   Wikipedia

  • Water resources — A natural wetland Water resources are sources of water that are useful or potentially useful. Uses of water include agricultural, industrial …   Wikipedia

  • Water heating — is a thermodynamic process using an energy source to heat water above its initial temperature. Typical domestic uses of hot water are for cooking, cleaning, bathing, and space heating. In industry, both hot water and water heated to steam have… …   Wikipedia

  • Meteoric water — is a hydrologic term of long standing for water in the ground which originates from precipitation. This includes water from lakes, rivers, and icemelts, which all originate from precipitation indirectly. Contents 1 Overview 2 History 3 See also …   Wikipedia

  • Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… …   Wikipedia

  • Purified water — Bottle for Distilled water in the Real Farmacia in Madrid Purified water is water from any source that is physically processed to remove impurities. Distilled water and deionized (DI) water have been the most common forms of purified water, but… …   Wikipedia

  • dam — dam1 /dam/, n., v., dammed, damming. n. 1. a barrier to obstruct the flow of water, esp. one of earth, masonry, etc., built across a stream or river. 2. a body of water confined by a dam. 3. any barrier resembling a dam. v.t. 4. to furnish with a …   Universalium

  • Dam — /dam, dahm/, n. (Carl Peter) Henrik /kahrl pee ter hen rik/; Dan. /kahrddl pay teuhrdd hen rddik/, 1895 1976, Danish biochemist: Nobel prize for medicine 1943. * * * I Barrier built across a stream, river, or estuary to conserve water for such… …   Universalium

  • Tillage — Cultivating after early rain. Tillage is the agricultural preparation of the soil by mechanical agitation of various types, such as digging, stirring, and overturning. Examples of human powered tilling methods using hand tools include …   Wikipedia

  • Groundwater — Shipot, a common source of drinking water in a Ukrainian village. Groundwater is water located beneath the ground surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an… …   Wikipedia

  • 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

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