Silica gel — Identifiers CAS number 63231 67 4 … Wikipedia
Soil mechanics — is a discipline that applies principles of engineering mechanics, e.g. kinematics, dynamics, fluid mechanics, and mechanics of material, to predict the mechanical behavior of soils. Together with Rock mechanics, it is the basis for solving many… … Wikipedia
soil — soil1 soilless, adj. /soyl/, n. 1. the portion of the earth s surface consisting of disintegrated rock and humus. 2. a particular kind of earth: sandy soil. 3. the ground as producing vegetation or as cultivated for its crops: fertile soil. 4. a… … Universalium
silica — n. silicon compound occurring in flint, quartz and sand. ♦ siliceous, ♦ silicic, a. ♦ silicicolous, a. growing in flinty soil. ♦ siliciferous, a. producing silica or silicon. ♦ silicify, v.t. convert into silica. ♦ silicon, n … Dictionary of difficult words
Soil Horizon letter designations — ▪ Table Soil horizon letter designations See as table: Base symbols for surface horizons O organic horizon containing litter and decomposed organic matter A mineral horizon darkened by humus accumulation Base symbols for subsurface horizons … Universalium
San Joaquin (soil) — San Joaquin is an officially designated state insignia, the State Soil of the U.S. state of California.The California Central Valley has more than 500,000 acres (2,000 km²) of San Joaquin soils, named for the south end of that valley. This series … Wikipedia
Jackson-Sherman soil weathering stages — ▪ Table Jackson Sherman soil weathering stages characteristic minerals in soil clay fraction characteristic chemical and physical conditions of soil characteristic soil profile features early stage gypsum,… … Universalium
Lithogenic silica — (LSi) comes from the Greek words lithos , which means rock , and genesis , which means coming from . LSi is silica that originates from terrestrial sources of rock and soil, i.e. from silicate minerals and crystals.In the marine silicon cycle,… … Wikipedia
FAO Soil Classification System — ▪ Table Soil classification system of the Food and Agriculture Organization soil group abbrevi ation defining characteristics name derivation percent of Earth s land area See as table: Soils defined by parent material Andosol AN volcanic… … Universalium
Silicosis — Classification and external resources ICD 10 J62 ICD 9 502 … Wikipedia
Equisetum arvense — Field Horsetail Equisetum arvense Scientific classification Kingdom: Plantae … Wikipedia