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 ?
2002), who compacted loamy soils close to our study site to > 3,000 kPa below 10 centimeters depth and still found no significant effect of compaction on above-ground tree productivity.
Ash application at 625 Mg/ha reduced stem weight and grain yield compared with control on both soils, but the decrease was significant only on the loamy soil.
Beans 3 and Groundnut 2 nodulated better in loamy soil than the other beans and groundnut varieties, whereas Beans 3 produced more nodules in humus soil than the other varieties.
The Nilgiri district, with laterite loamy soil and a reasonably well-distributed rainfall (120-150 cm.
As recommended in the October issue of Garden Design, ``plant bluebells lavishly: 70 per square yard, 4 inches deep, in rich, loamy soil.
Litchi requires well drained deep loamy soil preferably slightly acidic, for its growth.
The loamy soil accumulated two to three times more of the available lead, and most of the lead decomposition products there, unlike those at the other sites, were in an extractable (largely unbound) form.
Slowinska-Jurkiewicz and Domz al (1991) evaluated the structural changes produced by the passage of a tractor's front and rear wheels on a sandy and a loamy soil.
Plant evergreen trees and shrubs | Put up windbreaks to protect new trees and shrubs | Trim grey-leaved shrubs to keep them bushy | Stake tall perennials | Deadhead daffodils and primroses | Sow globe artichokes, which can be planted out on light or loamy soil in full sun | Tomato plants started in January should be ready to move into their final pots or be planted directly into a glasshouse border | Continue to lift and divide clumps of congested perennials and grasses | Cut back lavatera hard, as new shoots will soon appear | Tear off rose sucker shoots growing from below the point where the variety is grafted on to the rootstock, where you see a lumpy bit on the main stem
A loamy soil will be somewhere in between the two extremes.
Children dig the loamy soil for earthworms as a part of the Youth Education program, which engages school groups and neighborhood children in farm activities, environmental stewardship and health.
s] reduction was probably because the pores in the loamy soil were big enough to allow the dispersed particles to move downwards with the percolating water without plugging the pores (Keren and Singer 1988; Keren and Ben-Hur 2003).