Laserfiche WebLink
Custom Soil Resource Report <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 />Land Classifications <br />This folder contains a collection of tabular reports that present a variety of soil <br />groupings. The reports (tables) include all selected map units and components for <br />each map unit. Land classifications are specified land use and management groupings <br />that are assigned to soil areas because combinations of soil have similar behavior for <br />specified practices. Most are based on soil properties and other factors that directly <br />influence the specific use of the soil. Example classifications include ecological site <br />classification, farmland classification, irrigated and nonirrigated land capability <br />classification, and hydric rating. <br />Land Capability Classification (Yuma County - Moser Pit) <br />The land capability classification of map units in the survey area is shown in this table. <br />This classification shows, in a general way, the suitability of soils for most kinds of field <br />crops (United States Department of Agriculture, Soil Conservation Service, 1961). <br />Crops that require special management are excluded. The soils are grouped <br />according to their limitations for field crops, the risk of damage if they are used for <br />crops, and the way they respond to management. The criteria used in grouping the <br />soils do not include major and generally expensive landforming that would change <br />slope, depth, or other characteristics of the soils, nor do they include possible but <br />unlikely major reclamation projects. Capability classification is not a substitute for <br />interpretations designed to show suitability and limitations of groups of soils for <br />rangeland, for forestland, or for engineering purposes. <br />In the capability system, soils are generally grouped at three levels: capability class, <br />subclass, and unit. <br />Capability classes, the broadest groups, are designated by the numbers 1 through 8. <br />The numbers indicate progressively greater limitations and narrower choices for <br />practical use. The classes are defined as follows: <br />Capability subclasses are soil groups within one class. They are designated by adding <br />a small letter, e, w, s, or c, to the class numeral, for example, 2e. The letter a shows <br />that the main hazard is the risk of erosion unless close-growing plant cover is <br />maintained; w shows that water in or on the soil interferes with plant growth or <br />cultivation (in some soils the wetness can be partly corrected by artificial drainage); <br />s shows that the soil is limited mainly because it is shallow, droughty, or stony; and <br />c, used in only some parts of the United States, shows that the chief limitation is climate <br />that is very cold or very dry. <br />16