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1 • <br /> <br /> MESA CLAX LOAM, 0 to 2 percent slopes, Class Its Land, (Mc) <br /> <br /> This soil ie largely derived from acid igneous soil-forming materials <br /> streams have brought down from higher watersheds. <br /> In clutivated fields the ~ or 10-inch surface soil consists of <br /> very pale-brown, pale-brown, or light-brown calcareous clay loam. <br /> It merges rith a reddish-yellow to light reddish-brown calcareous <br /> clay loam showing white or pinld ah-white 68gregatlon6 of Iiae. Below <br /> depths of 12 to 14 inches, the reddish-yellow to light-brown clay loam <br /> exhibits numerous white streaks or splotches that have n comparatively <br /> vertical or fagged outline along road cute. A few scattered cobbles <br /> and pieces of gravel, cobbles, end atones derived largely from granite <br /> and basalt but to some extent from lava and sandstone. Most of the <br />' sandstone ie crumbly or partly disintegrated. Mancoa.shale underlies <br />8 t <br /> o <br />the gravel-and-cobble substratum in moat places nt depths below <br /> 12 feet. In some places, however, the shale may be na near the surface <br /> as 4 or 5 feet, and others as far down na 20 feet. <br />The high lime content of this soil doubtless offers acme reeietaace <br />to penetration of eater and plant roots but the entire profile is <br />friable when moist. Judging from many orchaids and alfalfa fields, <br />its permeability to deep-rooted trope is sufficient to permit healthy <br />and vigorous plant growth. Dnderdrainage is adequate; hnrnlyl con- <br />' centrationa of salt are negligible. <br />' Soil limitations are classified ne severe for sanitary land fill <br />(bank unstability below 40", rppid permeability below k0"), and <br />' sewage ]agoona (if excavated to below 40"). <br />lJ <br />u <br /> <br />