soil

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soil

(soyl),
Dirt.

soil

the uppermost layer of the earth's crust that supports the majority of terrestrial plant life together with many animals and microorganisms. Soil derives from the erosion of the rock strata and contains minerals and variable amounts of organic material derived from organisms which live or have lived upon it. Soils are affected by climate, living organisms, parent rock, relief, groundwater and age, and usually contain various ‘horizons’, the succession of which is called the ‘soil profile’. MULL soils tend to be alkaline and ‘Mor’ soils acid. Soils may be heavy clay, loam (sand and clay), peaty (large amounts of dead plant material), chalky light or sandy

soil

the earth, origin of all plant growth and the basis of all animal agriculture. Its characteristics of chemical composition, physical structure, especially porosity and water retaining capacity, its humus content, pH and salinity exert enormous effects on its productivity.

soil analysis
an essential activity in densely farmed farms. Measures the soil content of total and available amounts of each of the important soil minerals.
soil contaminated herbage
either from dust storms or in loose soil by hoof movement may contribute to dental attrition in sheep, or sand colic in horses.
soil eating
a form of pica; caused by salt deficiency.
soil fumigants
are used to prepare fields for planting and may cause poisoning in animals grazing them or eating crops harvested from them. See methyl bromide.
soil type
includes clay, sand, loam.
References in periodicals archive ?
It's best placed at the base of a sunny wall, where it will bloom beautifully in all soil types, and whatever the weather, in late winter/ early spring.
Comparison of the mean soil type also showed that most of this ratio there is in soil with heavy texture (Figure 11).
General linear models for unbalanced analyses of variance, which are designed for unbalanced datasets, were conducted to test the main and interactive effects of landform, land use and soil type on soil properties.
There was, however, a significant association between fungus substrate and soil type.
The mean pH values by soil type, in decreasing order, were acid purple soil Greater than bleached paddy soil Greater than yellow earth.
The soil type data of this study (the original shape files of soil types in 1987 and 2006) were provided by the National Key Technology Program "Study on Ecology-Economic Regionalization and Ecological Compensation in the South of Junggar Basin" (a project of studying the structure of ecology-economic system, the principles and references of regionalization, and the grade of ecological security in Manasi River Basin, Xinjiang).
Sixteen soil samples (0-75 mm depth) of each soil type were taken to determine background soil chemical properties (see below), and 24 samples of each soil type were also taken from each site for soil physical analyses (see below).
Sixteen days after infestation (11 Mar 2007), 6 plants in each soil type (marl soil or potting medium) were flooded by placing each plant container into a larger 19-L plastic container filled with tap water with the water level maintained 10 cm above the soil surface (24 cm total depth).
For each soil type, a control nursery was seeded with three bean seeds in order to ensure adequate representation and reliability of results.
However, parameters such as AM fungi, Azotobacter, rock phosphates and soil type have significant influence on the plant growth performance and barbaloin yield.