soft rock phosphate
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Underground mining (soft rock) — refers to a group of underground mining techniques used to extract coal, oil shale and other minerals or geological materials from sedimentary ( soft ) rocks. Because deposits in sedimentary rocks are commonly layered and relatively less hard,… … Wikipedia
soft phosphate — noun : a powdery impure form of tricalcium phosphate of low fertilizer value occurring in natural deposits of phosphate rock and separated from hard rock and pebble phosphates in fertilizer manufacture … Useful english dictionary
Rock crusher — A rock crusher is a machine designed to take large rocks and reduce them to smaller rocks, gravel, or rock dust. Rock crushers produce aggregates and ready to process mining ores, as well as rock fill material for landscaping and erosion control … Wikipedia
sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… … Universalium
Sedimentary rock — Middle Triassic marginal marine sequence of siltstones (below) and limestones (above), Virgin Formation, southwestern Utah, USA Sedimentary rock are types of rock that are formed by the deposition of material at the Earth s surface and within… … Wikipedia
Phosphorus — This article is about the chemical element. For other uses, see Phosphorus (disambiguation). silicon ← phosphorus → sulfur … Wikipedia
India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… … Universalium
Montana — Montanan, adj., n. /mon tan euh/, n. a state in the NW United States. 786,690; 147,138 sq. mi. (381,085 sq. km). Cap.: Helena. Abbr.: MT (for use with zip code), Mont. * * * State (pop., 2000: 902,195), northwestern U.S. Bordered by Canada and… … Universalium
Cover crop — Agriculture General … Wikipedia
Quarry — For other uses, see Quarry (disambiguation). A quarry is a type of open pit mine from which rock or minerals are extracted. Quarries are generally used for extracting building materials, such as dimension stone, construction aggregate, riprap,… … Wikipedia
Phosphoric acid — This article is about orthophosphoric acid. For other acids commonly called phosphoric acid , see Phosphoric acids and phosphates. Phosphoric acid … Wikipedia
