loess Mineral: most carbonates small amount of clay minerals good aeration, water-holding ability easy to be transported by river and wind for example: 1935 dust storm in midwest United States 18
Fruit PLANT TYPE SOIL pH Apple 5.0-6.5 Apricot 6.0-7.0 Arbor Vitae 6.0-7.5Blueberry, high bush 4.0-5.0 Cherry, sour 6.0-7.0 Cherry, sweet 6.0-7.5 Crab apple 6.0-7.5 Cranberry, large 4.2-5.0 Peach 6.0-7.5 Pineapple 5.0-6.0 Raspberry, red 5.5-7.0 28 Strawberry 5.0-6.5 http://netc.nwsuaf.edu.cn/jingpin/2003/turangxue/ppt/5.1.ppt
Summar y Clay: perfect water-holding ability good for paddy rice fields. Both loess and loam can be tillable soil for most of plants. But loam is better, because of more nutrients. more than 1.5% organic matter pH value by 6.5 30
Different soil types develop in different climates. Image: T. Loynachan Soils-4-1
Prairie soils have a dark surface layer(horizon), are rich in minerals, and form in grasslands widespread across Earth’s middle latitudes.Images: NRCS Soils-4-2
Forest soils have a light gray upper horizon, a horizon rich in aluminum and/or iron, and form in warm to coolhumid regions where coniferous forests grow. Image: Soil Classifiers of Michigan
Tropical soils are reddish and iron-oxide rich, depleted in nutrients, and form in humid and warm regions.Images: National Cooperative Soil Survey, University of Nebraska Soils-4-4
Organic soils are dark colored, rich in decomposed organic matter, and form in poorly drained lowlands such as swamps and wetlands.Images: Bruce Molnia, Soil Classifiers of Michigan Soils-4-5
Desert soils form in arid settings and are commonly rich in calcium carbonate. Images: Martin Miller, NRCS
Tundra soils form in Arctic environments, have a dark organic-rich upper layer, and a mineral rich layer over frozen ground. 37Images: Travis Hudson, Alaska/Yukon Society of Professional Soil Scientists Soils-4-7
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