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 ?
Weighting functions based on Eqn 16 for saturated paste extracts (a) [EC.sub.S] = 4 dS [m.sup.-1] ([h.sub.os] = 14.4 m) and (b) [EC.sub.S] = 10dS[m.sup.-1] ([h.sub.os] = 36m), for soils of different texture: 1, coarse sand; 2, fine sand; 3, fine sandy loam; 4, sandy clay loam; and 5, basin clay (Rijtema 1969).
Under the environmental conditions of the state of Acre, the use of mulching with biomass of spontaneous plants anticipated the harvest of yellow passion fruits in up to 74 days in sandy loam soil and in up to 100 days in clay loam soil.
The maximum value of phosphorus contents was found in mound soil of type sandy loam (6.14+-0.4), and minimum value was found in sandy soil type (4.47+-0.2) (Table II).
In this research were chosen four soils that is typical in Lithuania which are clay, loam, sandy loam and peat.
Sandy loam accounts for more than 35% of soils put into crop production in Abakaliki area of southeastern Nigeria.
Inoculum bags were buried in 500-gram samples of field-collected nonsterile sandy loam soil placed in 1-liter glass laboratory containers.
In the soil with sandy loam texture, the position of Rep varied from 12.3 pm for the DC of 75% to 17.4 pm for DC = 95% (Figure 1A).
Soil texture in research site is sandy loam, silty loam, sandy clay loam, to bulk density 0.97 g/cc to 1.29 g/cc, Soil water content 3.4% to 50.9 %, Porosity 43.4% to 58.7%.
Table 1 HSG based on USDA soil classification HSG Soil Texture A Sand, loamy sand or sandy loam B Silt or loam C Sandy clay loam D Clay loam, silt clay loam, sandy clay, silty clay, or clay Table 2 Soil types according to soil texture Type of soil Soil texture Coarse Loamy Typic Dystropepts Clay loam Coarse Loamy Typic Humitropepts Sandy clay loam Fine Loamy Lithic Troporthents loam Fine Loamy Typic Dystropepts Silty clay Sandy loam Loamy sand Typic Tropudalf Silty clay Ultic Dystropepts Loamy sand Ultic Tropudalf Sandy clay loam Table 3 Hydrological soil group, land use and CN S.
(2010) studied the fate of pesticides in sandy loam soil of Pakistan at different water table depths.
Using a medium filter depth of 60 cm, the filter type used in Cell A, which approximated the recommended sandy loam soil, and the recommended surface area of 10% of the catchment area, the long-term hydrologic performance of bioretention systems was assessed by inputting the annual meteorological data in 2012.
Their findings from another sandy loam textured soil from Karachi are showing that those soils are much better for cultivation as compared to the study area.

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