Forest physiography; physiography of the United States and principles of soils in relation to forestry . region is derivedfrom the underlying sedimentary rock. An even higher proportion oflocally derived material is found in the Connecticut Valley. Such glacial forms as drumlins, eskers, sand plains, moraines, etc.,have distinctive soil characters that are easy of identification. Onaccount of their flatness and areal extent the sand plains of the Con-necticut Valley deserve special consideration. The material of the sandplains is commonly loose and porous, varies in texture from fine tocoarse
Forest physiography; physiography of the United States and principles of soils in relation to forestry . region is derivedfrom the underlying sedimentary rock. An even higher proportion oflocally derived material is found in the Connecticut Valley. Such glacial forms as drumlins, eskers, sand plains, moraines, etc.,have distinctive soil characters that are easy of identification. Onaccount of their flatness and areal extent the sand plains of the Con-necticut Valley deserve special consideration. The material of the sandplains is commonly loose and porous, varies in texture from fine tocoarse but is always prevailingly sandy, may have moderate naturalfertility but is generally decidedly infertile as compared with the more 1 Rice and Gregory, Manual of Connecticut Geol. Bull. Conn. Geol. and Nat. Hist. 6, 1906, pp. 251-253. OLDER APPALACHIANS (NORTHERN DIVISION) 66l clayey soils of the till plains, and has a high absorptive capacity becauseof its flatness and porosity. Its loose nature, however, prevents it fromretaining the absorbed water in large enough quantities and for long. Fig. 267. — The North Haven sand plain, or desert, five miles south of Wallingford, Conn. See theNew Haven quadrangle, U. S. Geol. Surv. Part of Mt. Carmel in the background. Note the tuftedgrass {Andropogon scoparius) and the extent of bare surface. (Photograph by Beede.) enough periods as a rule to allow a maximum or even a favorable plantgrowth, and sand plains are commonly local semi-arid tracts in the midstof more fertile areas. One of the best illustrations of these features found in New Englandis the North Haven sand plain which stretches from Montowese (NewHaven topographic sheet) to Wallingford, Connecticut, and beyond. Itis about 15 miles long, with an average width of i to 2 or more surface is in general flat or gently sloping; its soils vary in texturefrom a fine to a coarse sandy loam, with large areas of pure sand withouta loamy admixture. The yellow sand s
Size: 2465px × 1014px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
