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Soil Survey of Upper Tanana Area, Alaska Upper Tanana Soil Survey Area

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Soil Survey of Upper Tanana Area, Alaska Upper Tanana Soil Survey Area United States Department of Agriculture, Natural Resources Conservation Service Soil Survey of In cooperation with the University of Alaska Fairbanks Upper Tanana Agricultural and Forestry Experiment Station, and the State of Alaska Department of Natural Resources Area, Alaska This soil survey is a publication of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture (USDA) and other Federal agencies, State agencies, and local agencies. The Natural Resources Conservation Service (NRCS) (formerly the Soil Conservation Service) has leadership for the Federal part of the National Cooperative Soil Survey. Major fieldwork for this soil survey was completed in 1982. Soil names and descriptions were approved in 1986. Unless otherwise indicated, statements in this publication refer to conditions in the Survey Area in 1982. This survey was made cooperatively by the Natural Resources Conservation Service, the University of Alaska Fairbanks Agricultural and Forestry Experiment Station, and the State of Alaska Department of Natural Resources. It is part of the technical assistance furnished to the Salcha-Big Delta Soil and Water Conservation District. Soil maps in this survey may be copied without permission. However, enlargement of these maps could cause misunderstanding of the detail of mapping. If enlarged, maps do not show the small areas of contrasting soils that could have been shown at a larger scale. USDA prohibits discrimination in all its programs and activities on the basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720- 2600 (voice and TDD). To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326W, Whitten Building, 14th and Independence Avenue, SW, Washington, D.C. 20250- 9410 or call 202-720-5964 (voice or TDD). USDA is an equal opportunity provider and employer. Cover: Mt. Hayes, in the Alaska Range, dominates Map Unit 311—Jarvis-Fubar complex, 0 to 7 percent slopes, on the alluvial plain. ii Soil Survey of Upper Tanana Area, Alaska Upper Tanana Soil Survey Area # Delta Junction %U# Soil Survey of Upper Tanana Area, Alaska iii Table of Contents INDEX TO MAP UNITS ...................................................................................................................................... vi SUMMARY OF FIGURES.................................................................................................................................. vii SUMMARY OF TABLES .................................................................................................................................. viii FOREWORD ...................................................................................................................................................... ix GENERAL NATURE OF THE SURVEY AREA....................................................................................................1 Introduction ......................................................................................................................................................1 History..............................................................................................................................................................2 Climate.............................................................................................................................................................2 Geology............................................................................................................................................................3 Permafrost and Frost Heaving..........................................................................................................................3 HOW THIS SURVEY WAS MADE .......................................................................................................................4 DETAILED SOIL MAP UNITS .............................................................................................................................6 Map Unit Descriptions.......................................................................................................................................7 FIGURES........................................................................................................................................................... 39 USE AND MANAGEMENT OF THE SOILS....................................................................................................... 42 Crops and Pasture.......................................................................................................................................... 42 Agronomy Practices.................................................................................................................................... 42 Conservation Practices ...............................................................................................................................43 Land Clearing.............................................................................................................................................. 43 Native Vegetation........................................................................................................................................... 44 Wildlife Habitat............................................................................................................................................... 45 Rural Homesite Development......................................................................................................................... 46 Engineering .................................................................................................................................................... 47 Building Site Development.......................................................................................................................... 48 Sanitary Facilities........................................................................................................................................ 48 Construction Materials................................................................................................................................. 50 Water Management .................................................................................................................................... 51 SOIL PROPERTIES .......................................................................................................................................... 53 Engineering Index Properties.......................................................................................................................... 53 Physical and Chemical Properties .................................................................................................................. 54 Water Features............................................................................................................................................... 56 Hydric Soils .................................................................................................................................................... 57 Soil Features .................................................................................................................................................. 58 iv Soil Survey of Upper Tanana Area, Alaska CLASSIFICATION OF THE SOILS....................................................................................................................60 SOIL SERIES, HIGHER TAXA, AND THEIR MORPHOLOGY...........................................................................60 Cryorthents .....................................................................................................................................................61 Ester Series ....................................................................................................................................................61 Fubar Series ...................................................................................................................................................62 Goldstream Series ..........................................................................................................................................63 Goodpaster Variant .........................................................................................................................................64 Histosols .........................................................................................................................................................65 Jarvis Series ...................................................................................................................................................66 Koyukuk Series...............................................................................................................................................67 Minchumina Series .........................................................................................................................................68 Nenana Series ................................................................................................................................................68 Salchaket
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