loam

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loam,

soil composed of sand, silt, clay, and organic matter in evenly mixed particles of various sizes. More fertile than sandy soils, loam is not stiff and tenacious like clay soils. Its porosity allows high moisture retention and air circulation. The popular confusion of loam with humushumus
, organic matter that has decayed to a relatively stable, amorphous state. It is an important biological constituent of fertile soil. Humus is formed by the decomposing action of soil microorganisms (e.g.
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 is probably due to the superior quality of both soils. According to the preponderance of their ingredients, loams are classified as sandy, clay, or silt loams. Most soils of agricultural importance are some type of loam.

Loam

 

a friable sandy and clayey sedimentary rock containing 10–30 percent (by weight) clay particles smaller than 0.005 mm. In soil science, loam with a higher clay content is called heavy loam, and that with less clay is called light loam. A distinction is made between coarse sandy, fine sandy, and silty loam, depending on the content of (1) sand grains of the corresponding size and (2) silty, or aleurite, particles.

The mineralogical composition of loam is varied: the more sandy loan has a high quartz content, whereas the more clayey type contains clay minerals, such as kaolinite, illite, and montmorillonite. Loam is sometimes rich in organic substances; in arid regions it may be rich in water-soluble salts. The origin of loam is usually continental; the corresponding ocean deposits are called sandy or aleurite clays. Loam is often used as a raw material for the production of brick.

loam

[lōm]
(geology)
Soil mixture of sand, silt, clay, and humus.
(metallurgy)
Molding material consisting of sand, silt, and clay used over backup material for producing massive castings, usually of iron or steel.

loam

In building construction, a mixture composed chiefly of moistened clay, sand, and silt, or some mixture including these ingredients. Once used as a mortar when combined with lime, or used as a plaster with the addition of chopped straw.

loam

1. rich soil consisting of a mixture of sand, clay, and decaying organic material
2. a paste of clay and sand used for making moulds in a foundry, plastering walls, etc.
References in periodicals archive ?
ID Quarter Type of soil Forest Type of forest No site type (for 2013) 1 39 Loam modal podzol C2 Pine forest with spruce with plant cover of lily-of-the-valley and celandine 2 40 Sandy-loam modal B3 Pine forest with podzol spruce and birch with plant cover of lily-of-the-valley and celandine 3 41 Sandy podzol.
We found a wide range of variations in soil texture class within a given soil type, in particular for RS (soil texture, sand to clay loam) and HYC (soil texture, loam to clay).
1983) reported no significant increase in PAWC with an increase in clay content from silt loam to clay.
Variable underlying geology leads to differing soil types planted to vineyards in each AVA; predominantly loamy fine sands and fine sandy loam in Texas High Plains, silty clay loam and loam in Escondido Valley, loam and clay loam in Texas Davis Mountains, and clay loam and sandy loam in Mesilla Valley.
Variable geologie sous-jacente conduit a une variation des types de sol plantes aux vignobles dans chaque AVA ; principalement loam sableux et le loam sablo-argileux dans Texas High Plains, loam limoneux et loam dans Escondido Valley, loam et loam argileux dans Texas Davis Mountains, et loam argileux et loam sableux dans Mesilla Valley.
The Nelson soil, a Motupiko silt loam, is a weathered fluvial recent soil derived from greywacke, whereas the Southland soil, a Waikiwi silt loam, is a deeper soil derived from loess from tuffaceous greywacke and schist.
5 for the Waitoa silt loam and Te Puninga silt loam, respectively.
In comparison, when the Mt Bold loams with predominantly macropore flow were pre-wetted, about the same proportion of the initial drainage was new water (44%; Table 3).
Sites were selected on Waiareka clay and Wakanui silt loam soils under a range of cropping intensities from permanent pastures, various crop--pasture rotations, to long-term continuous cropping.
Where nitrate is non-limiting, denitrification rates appear to be highest in irrigated loam soils.
The lowest total Cd concentration was in the Te Kowhai silt loam, which again is in the range determined for Gley Soils (Roberts et al.