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CLIMATIC GROUPS OF RAW SOILS

FOR SEVERAL YEARS THE PROJECT COMMITTEES ON EROSION CONTROL AND PLANT ECOLOGY AND ON COOPERATIVE AGREEMENT PROJECT ANALYSES HAVE FELT THE NEED FOR SOME SIMPLE GROUPING OF SOILS INTO BROAD REGIONS, SO THAT SUCH A CLASSIFICATION COULD SERVE AS A BASIS FOR SEGREGATING AND COMPARING EROSION CONTROL PRACTICES AND RESULTS FROM THE VARIOUS STATES ACCORDING TO VARYING CONDITIONS OF SOIL AND CLIMATE. THIS CLASSIFICATION OF "CLIMATE GROUPS OF RAW-SOILS" IS BASED ON HORIZON C SOILS WHICH ARE PRODUCTS OF CLIMATIC WEATHERING OF PARENT MATERIAL AND WHICH HAVE BEEN AFFECTED BUT LITTLE IF AT ALL BY PLANT LIFE DEVELOPMENT. THERE ARE FEW OCCASIONS IN HIGHWAY CONSTRUCTION WHERE A AND B HORIZON SOILS ARE NOT LOST AS A RESULT OF EXCAVATION, AND EVEN THOUGH TOPSOIL IS SALVAGED AND REPLACED ON HIGHWAY SLOPES, IT IS SELDOM THAT THE QUANTITY OF TOPSOIL SO REPLACED IS SUFFICIENT TO RECREATE AGRICULTURAL FIELD CONDITIONS. IN OTHER WORDS, THE C HORIZON SOILS, OR RAW-SOILS, FORM BY FAR THE GREATEST PERCENTAGE OF SOIL AREA ALONG HIGHWAYS WHICH MUST BE TREATED AGAINST EROSION. TOPSOIL, WHEN SALVAGED AND REPLACED, IS A PART OF THE TREATMENT AGAINST EROSION, JUST AS ARE SEED, FERTILIZER, SOD, MULCH, ETC. /HRB/

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  • Publication Date: 1944

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  • Accession Number: 00204969
  • Record Type: Publication
  • Report/Paper Numbers: pp 67 - 70
  • Files: TRIS, TRB
  • Created Date: Dec 13 1971 12:00AM