loam

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Related to loamy: Loamy Sand, Loam soil

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 ?
For example, the coarser sand fraction appeared for the first time in the younger flood plain deposits and the loamy clay of the meander belt deposits from ancient streams.
Pine forests--many planted after the 1960s--cover 137,000 hectares (338,500 acres); they grow well over the schist and serpentine hills to the west, but have disappeared from the loamy plains in the south to make rooms for agriculture.
Territories of water-bearing units and their slopes: 1--Residues are formed by sandy loams, brownish-ashy podzol surface-clayed soil, under arable land; 2--Slopes of water-bearing units composed by forrest-like sandy loam soils and loamy soils, with brownish-ashy surface-clayed washed-out soils, under ploughed field and construction.
Soil type in all three fields was Milham sandy loam (fine loamy, mixed, superactive, thermic Typic Haplargids) except for one corner of Field 1, which contained Kimberlina fine sandy loam (coarse loamy, mixed, superactive, calcareous, thermic Typic Torriorthents).
6 milligrams of alum-calcium carbonate per gram of sediment suppressed phosphorus release by 92 percent in sandy sediments and by 72 percent in clay loam and loamy sand sediments.
The Yarra, however, with its cool climate and loamy soils, is often seen as the closest Aussie pinot comes to its illustrious cousin in France.
Both the BENKY ONE and BRADFORD FIVE arrivals have a transition route from Kirksville VOR (IRK) to LOAMY intersection.
Soil textural differences within Oxisols allowed identifying different fragility degrees, since sandy or loamy soils or those with significant clay increase with depth (argillic-like horizons) received greater fragility grade than clayey or fine clayey ones.
Bol Ajuong, a staff member of Rhino stars that worked in cooperation with Tiger two told the Sudan Tribune during the celebration that lack of machineries, landmines, loamy soil, uncertain security and resistance from local community delayed the construction that began in February this year.
More local soil classes include entisols (especially on more recent colluvium/alluvium), inceptisols (especially on deep/damp colluvium/alluvium), mollisols (often with more stable grass, cane or cedar cover), and alfisols (on more weathered loamy uplands with more woodland history just above the chalk).