| 词汇 | hardpan |
| 释义 | BETA Examples of hardpanhardpan isn’t in the Cambridge Dictionary yet. You can help! The ditches around the circles penetrated the hardpan, helping to drain the prairie soil. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Not until the 19th century, when they succeeded in breaking up the hardpan and cultivating arable land, did sheep farming decline. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The iron and humus particles released by the topsoil precipitate onto this impervious hardpan. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Visitors are asked to stay on the trails and off bare rock and hardpan to avoid damage to fossils and fragile soils. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The depth to hardpan ranged from 1 foot to 6 feet. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He soon noticed the phenomenon referred to as hardpan (the creation of a water resistant soil layer). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Care was taken to maintain vertical profiles every five feet and to keep a clean floor in the trench going down to the hardpan. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The surrounding area has leached, gravelly-sandy soils with layers of hardpan, covered by open sand, large areas of heathland and extensive coniferous forest. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The stream meander belt cuts below the hardpan. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Part of this soil profile includes an underlying clay or iron hardpan. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This type of landscape typically has a shallow basement layer such as bedrock, hardpan, claypan, or densely bedded gravel. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Other soils may have an impervious layer of mineralized soil, called a hardpan or relatively impervious rock layers may underlie shallow soils. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. An area can have layers of sandy soil, fractured bedrock, clay, or hardpan. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The results are primarily determined by how extensive and / or intractable the hardpan is. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Not until the hardpan could be broken, enabling the cultivation of arable land, did sheep farming decline. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Its surface is hilly upland made of shaly loam atop hardpan, while the valleys consist of gravelly loam and alluvium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Common salts such as sodium ions contained in wastewater can fulfil this role and lead to a localized hardpan in some soil types. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A thick layer of ash can turn into a calcium rich hardpan as tough as cement after being rained upon. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Winter rains may be necessary to loosen the hardpan soil where some nests are deposited. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The entire structure was built on an artificial foundation set atop 3,128 pilings driven deep into the underlying hardpan. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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