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Soil Information for All Uses <br />Soil Reports <br />The Soil Reports section includes various formatted tabular and narrative reports <br />(tables) containing data for each selected soil map unit and each component of each <br />unit. No aggregation of data has occurred as is done in reports in the Soil Properties <br />and Qualities and Suitabilities and Limitations sections. <br />The reports contain soil interpretive information as well as basic soil properties and <br />qualities. A description of each report (table) is included. <br />Soil Chemical Properties <br />This folder contains a collection of tabular reports that present soil chemical properties. <br />The reports (tables) include all selected map units and components for each map unit. <br />Soil chemical properties are measured or inferred from direct observations in the field <br />or laboratory. Examples of soil chemical properties include pH, cation exchange <br />capacity, calcium carbonate, gypsum, and electrical conductivity. <br />Chemical Soil Properties <br />This table shows estimates of some chemical characteristics and features that affect <br />soil behavior. These estimates are given for the layers of each soil in the survey area. <br />The estimates are based on field observations and on test data for these and similar <br />soils. <br />Depth to the upper and lower boundaries of each layer is indicated. <br />Cation-exchange capacity is the total amount of extractable bases that can be held <br />by the soil, expressed in terms of milliequivalents per 100 grams of soil at neutrality <br />(pH 7.0) or at some other stated pH value. Soils having a low cation-exchange capacity <br />hold fewer cations and may require more frequent applications of fertilizer than soils <br />having a high cation-exchange capacity. The ability to retain cations reduces the <br />hazard of ground-water pollution. <br />Effective cation-exchange capacity refers to the sum of extractable bases plus <br />aluminum expressed in terms of milliequivalents per 100 grams of soil. It is determined <br />for soils that have pH of less than 5.5. <br />27 <br />