SOIL SURVEY OF PECOS COUNTY, TEXAS ELECTRONIC VERSION This soil survey is an electronic version of the original printed copy, dated May 1980. It has been formatted for electronic delivery. Additional and updated information may be available from the Web Soil Survey. In Web Soil Survey, identify an Area of Interest (AOI) and navigate through the AOI Properties panel to learn what soil data is available. United States Department of Agriculture Soil Conservation Service In cooperation with Texas Agricultural Experiment Station Soil Survey of Pecos County, Texas ii HOW TO USE THIS SOIL SURVEY Soil Survey of Pecos County, Texas iii This soil survey is a publication of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other federal agencies, state agencies including the Agricultural Experiment Stations and local agencies. The Soil Conservation Service has leadership for the federal part of the National Cooperative Soil Survey. In line with Department of Agriculture policies, benefits of this program are available to all, regardless of race, color, national origin, sex, religion, marital status, or age. Major fieldwork for this soil survey was completed in the period 1967-77. Soil names and descriptions were approved in 1977. Unless otherwise indicated, statements in this publication refer to conditions in the survey area in 1977. This survey was made cooperatively by the Soil Conservation Service and the Texas Agricultural Experiment Station. It is part of the technical assistance furnished to the Rio-Grande-Pecos River, Toyah-Limpia, Trans Pecos, and Upper Pecos Soil and Water Conservation District. Soil maps in this survey may be copied without permission. Enlargement of these maps, however, could cause misunderstanding of the detail of mapping. If enlarged,maps do not show small areas of contrasting soils that could have been shown at a larger scale. Cover: Area of Reagan-Hodgins association, nearly level. The 12-mile Mesa has an area of Lozier-Rock outcrop association, steep. Soil Survey of Pecos County, Texas iv Contents Index to map units............................................................................................. vi Summary of tables ............................................................................................ vii General nature of the survey area..................................................................... 1 Farming and ranching ..................................................................................... 1 Natural resources ........................................................................................... 2 Climate........................................................................................................... 2 How this survey was made ............................................................................... 3 General soil map for broad land use planning ................................................. 3 Descriptions of map units................................................................................ 4 1. Ector-Sanderson-Rock outcrop .............................................................. 4 2. Lozier-Rock outcrop ..............................................................................5 3. Brewster-Limpia .................................................................................... 6 4. Reakor-Upton-Delnorte .......................................................................... 7 5. Reagan-Hodgins-Iraan .......................................................................... 8 6. Dalby-Reakor......................................................................................... 9 7. Monahans-Orla-Hoban........................................................................... 10 8. Balmorhea-Reeves ................................................................................ 11 9. Pecos-Patrole-Arno................................................................................ 11 Broad land use considerations ........................................................................ 13 Soil maps for detailed planning ........................................................................ 13 Soil descriptions.............................................................................................. 14 Use and management of the soils..................................................................... 36 Crops and pasture .......................................................................................... 37 Irrigation and salinity.................................................................................. 38 Yields per acre........................................................................................... 38 Land capability classification ...................................................................... 39 Rangeland ...................................................................................................... 40 Recreation...................................................................................................... 41 Wildlife habitat ................................................................................................ 42 Engineering .................................................................................................... 44 Building site development .......................................................................... 45 Sanitary facilities........................................................................................ 46 Construction materials ............................................................................... 47 Water management ................................................................................... 48 Soil properties ................................................................................................... 50 Engineering properties.................................................................................... 50 Physical and chemical properties .................................................................... 51 Soil and water features ................................................................................... 53 Engineering test data...................................................................................... 55 Classification of the soils.................................................................................. 55 Soil series and morphology .............................................................................. 56 Arno series ..................................................................................................... 56 Balmorhea series............................................................................................ 57 Bigetty series.................................................................................................. 57 Brewster series............................................................................................... 58 Coyanosa series............................................................................................. 58 Dalby series.................................................................................................... 59 Delnorte series ............................................................................................... 60 Dev series ...................................................................................................... 60 Ector series .................................................................................................... 61 Hoban series .................................................................................................. 62 Hodgins series................................................................................................ 62 Iraan series..................................................................................................... 63 Limpia series .................................................................................................. 64 Lozier series ................................................................................................... 65 Soil Survey of Pecos County, Texas v Monahans series ............................................................................................ 65 Orla series...................................................................................................... 66 Pajarito series................................................................................................. 67 Patrole series.................................................................................................. 67 Pecos series................................................................................................... 68 Reagan series ................................................................................................ 69 Reakor series ................................................................................................. 70 Reeves series................................................................................................. 70 Rockhouse series ........................................................................................... 71 Sanderson series............................................................................................ 72 Upton series ................................................................................................... 73 Formation of the soils........................................................................................ 73 Factors of soil formation.................................................................................