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Custom Soil Resource Report <br /> promotes the accumulation of litter and mulch necessary to conserve soil and <br /> water. <br /> Rangeland <br /> Land on which the potential natural vegetation is predominantly grasses, <br /> grasslike plants, forbs, or shrubs suitable for grazing or browsing. It includes <br /> natural grasslands, savannas, many wetlands, some deserts, tundras, and <br /> areas that support certain forb and shrub communities. <br /> Reaction, soil <br /> A measure of acidity or alkalinity of a soil, expressed as pH values. A soil that <br /> tests to pH 7.0 is described as precisely neutral in reaction because it is neither <br /> acid nor alkaline. The degrees of acidity or alkalinity, expressed as pH values, <br /> are: <br /> Ultra acid: Less than 3.5 <br /> Extremely acid:3.5 to 4.4 <br /> Very strongly acid:4.5 to 5.0 <br /> Strongly acid:5.1 to 5.5 <br /> Moderately acid:5.6 to 6.0 <br /> Slightly acid:6.1 to 6.5 <br /> Neutral:6.6 to 7.3 <br /> Slightly alkaline:7.4 to 7.8 <br /> Moderately alkaline:7.9 to 8.4 <br /> Strongly alkaline:8.5 to 9.0 <br /> Very strongly alkaline: 9.1 and higher <br /> Red beds <br /> Sedimentary strata that are mainly red and are made up largely of sandstone <br /> and shale. <br /> Redoximorphic concentrations <br /> See Redoximorphic features. <br /> Redoximorphic depletions <br /> See Redoximorphic features. <br /> Redoximorphic features <br /> Redoximorphic features are associated with wetness and result from alternating <br /> periods of reduction and oxidation of iron and manganese compounds in the <br /> soil. Reduction occurs during saturation with water, and oxidation occurs when <br /> the soil is not saturated. Characteristic color patterns are created by these <br /> processes. The reduced iron and manganese ions may be removed from a soil <br /> if vertical or lateral fluxes of water occur, in which case there is no iron or <br /> manganese precipitation in that soil. Wherever the iron and manganese are <br /> oxidized and precipitated, they form either soft masses or hard concretions or <br /> nodules. Movement of iron and manganese as a result of redoximorphic <br /> processes in a soil may result in redoximorphic features that are defined as <br /> follows: <br /> 60 <br />