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''Orovada'' series soils are extensive in northern Nevada, where they have an extent of more than in the Great Basin. They are common soils on semiarid rangeland with sagebrush-grassland plant communities. Orovada soils are arable, able to be cultivated, when irrigated and are considered prime farmland. Alfalfa for hay and seed, winter wheat, barley, and for hay and pasture are the principal crops grown on these soils. Orovada soils are well drained and formed in alluvium derived from mixed rock sources and in loess and volcanic ash. These soils typically occur in the Great Basin section of the Basin and Range physiographic province. == Orovada series profile == * Surface layer: light brownish gray sandy loam * Subsurface layer: light brownish gray loam * Subsoil: light gray fine sandy loam * Substratum - upper: light brownish gray very fine sandy loam with carbonates * Substratum - lower: pale brown silt loam with carbonates 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Orovada (soil)」の詳細全文を読む スポンサード リンク
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