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・ Uster District
・ Uster railway station
・ Uster Technologies
・ Usteri
・ Usteria
・ Ustersbach
・ Ustertag
・ Usterzai
・ Uster–Oetwil tramway
・ Ustevatn
・ USTExchange
・ Ustia
・ Ustia (genus)
・ Ustia, Dubăsari
・ Ustia, Glodeni
Ustic
・ Ustica
・ Ustick Township, Whiteside County, Illinois
・ Ustikolina
・ Ustikolina Hydro Power Plant
・ Ustilaginaceae
・ Ustilaginales
・ Ustilaginoidea
・ Ustilaginoidea virens
・ Ustilaginomycetes
・ Ustilaginomycotina
・ Ustilago
・ Ustilago avenae
・ Ustilago esculenta
・ Ustilago tritici


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Ustic : ウィキペディア英語版
Ustic

Ustic is a class of soil moisture regime. It is one of a range of different soil moisture regimes, such as: aquic moisture regime, aridic moisture regime, udic moisture regime and xeric moisture regime. The ustic moisture regime is intermediate between the aridic regime and the udic regime.〔(【引用サイトリンク】title=Keys to Soil Taxonomy, United States Department of Agriculture, Natural Resources Conservation Service, Twefth Edition, 2014 )
== Definition ==
The ustic moisture regime (Latin: ''ustus'', burnt) applies to soils in which moisture is present, but limited, at times in which conditions are suitable for plant growth. A suborder of Mollisol, the ustic moisture regime is wetter than the aridic moisture regime and drier than the udic moisture regime. For a soil to be classified as ustic, averaged across the year, stored moisture plus rainfall is less than the amount of water lost from the soil via evapotranspiration. The ustic moisture regime is common in semi-arid and sub-humid climates.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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