soil horizon


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Related to soil horizon: soil profile
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a layer in a soil profile

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Both of these soil landscapes contain at least one soil horizon with low permeability.
Table-4: (b) Mean values of concentrations of Acid hydrolysable Amino Acids in (mg/Kg) of Soil Horizon A and B irrigated with United sugar industries effluents.
The soil horizon depth, along with saturated and residual moisture contents, was used to estimate the soil moisture storage capacity for each soil horizon and each soil association (see Fig.
Interpreting a paleosol may be hindered by eroded or partially preserved horizons, complex climatic and environmental histories, and in the case of buried paleosols, alteration of one or more soil horizons by infiltration of material from overlying units.
As a result, SOC may be sequestered in soil horizons in different forms and states, with varied residence times or turnover intensity and relationships with nitrogen (Batjes 1996; Falloon et al.
An A horizon is defined as a soil horizon with an accumulation of humified organic matter (Soil Survey Staff 1999).
A soil horizon is a layer of soil approximately parallel to the surface having similar characteristics produced by the soil-forming factors (time, climate, relief, parent material, and vegetation, as well as human influence; Figure 1-5).
The internal structure of the soil horizon is made up of swelling aggregates in a hierarchy of sizes; however, this structure is not represented by the soil parameters currently used in agronomic models.
The CEC varied appreciably among the aggregate classes, the soil horizon designations and the liming practices.
The uppermost soil horizon in the exposure is the Bt horizon of the surface soil.
When planting soybean using wide row widths, growers usually deep till prior to or at planting, using in-row chisels to fracture soil hardpans below the crop row, However, the amount of soil fracturing across the Ap soil horizon by in-row subsoiling may not be sufficient for soybean grown in narrow row widths.