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INTERPRETIVE GUIDE TO THE SOILS - Fauquier County

INTERPRETIVE GUIDE TO THE SOILS - Fauquier County

MAPPING UNIT POTENTIAL

MAPPING UNIT POTENTIAL FOR FORESTRY The management of trees begins with an understanding of the soil on which they grow or are to be grown. Some soils are very productive in growing wood crops; others may barely support tree cover. Different tree species may vary in production on the same soil. The probability of seeding survival, the relative dander of erosion when cover is removed, the resistance of trees to windthrow, and problems with equipment use during harvesting are some of the management items that can be inferred from soils information. Soil maps may be extremely useful in preparing pre-harvest plans, in applying erosion control methods, measures or practices while harvesting and regenerating forests in Fauquier County. In this generalized land use, soil mapping units were rated for their potential productivity under hardwood and pine forest types. Ratings were based on representative site indices. For further information about species suitability and woodland management practices, contact the County Forester, Virginia Department of Forestry. PROPORTIONATE EXTENT OF FAUQUIER COUNTY RATED FOR FORESTRY Hardwood Pine Low Productivity 22.6% 0 Moderately Low Productivity 28.4% 0 Moderate Productivity 19.5% 27.4% Moderately High Productivity 10.6% 6.4% High Productivity 10.0% 52.7% Very High Productivity 8.9% 13.5%

LAND USE CAPABILITY CLASSES Land capability classification shows the suitability of soils for most kinds of field crops. Crops that require special management are excluded. The soils are grouped according to their limitations for field crops, the risk of damage if they are used for crops, and the way they respond to management. The criteria used in grouping the soils do not include major and generally expensive land forming that would change slope, depth, or other characteristics of the soils, nor do they include possible but unlikely major reclamation projects. Capability classification is not a substitute for interpretations designed to show suitability and limitations of groups of soils for woodland or for engineering purposes. Capability classes are designated by Roman numerals I through VIII. The numerals indicate progressively greater limitations and narrower choices for practical use. The classes are defined as follows: • Class I soils have slight limitations that restrict their use. • Class II soils have moderate limitations that reduce the choice of plants or that require moderate conservation practices • Class III soils have severe limitations that reduce the choice of plants or that require special conservation practices, or both • Class IV soils have very severe limitations that reduce the choice of plants or that require special conservation practices, or both • Class V soils have are not likely to erode but have other limitations, impractical to remove, that limit their use • Class VI soils have severe limitations that make them generally unsuitable for cultivation • Class VII soils have very severe limitations that make them unsuitable for cultivation • Class VIII soils and miscellaneous areas have limitations that nearly preclude their use for commercial crop production The capability subclasses are designated with a small letter, e, w, s, or c, which follows the roman numeral (i.e. IIe). The classes are defined as follows: • e shows the main hazard is the risk of erosion unless close growing plant cover is maintained. • w shows water in or on the soil interferes with plant growth or cultivation (in some soils the wetness can be partly corrected by artificial drainage) • s shows the soil is limited mainly because it is shallow, droughty, or stony • c shows the chief limitation is very cold or very dry climate, used in only some parts of the United States

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