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EXHIBIT 26 - Continued • Spicerton Series - Continued peds and in root channels and poses; calcareous; very strongly alkaline; clear wavy boundary. (4 to 12 inches thick) B3sa 10-12"---Brown (lOYR 5/3) clay, dark brown (lOYFt 4/:3) moist; weak medium prismatic structure parting to fine angular blocks; hard, very friable, sticky, plastic; glossy patches on faces of peds, and in root channels; calcare- ous; very strongly alkaline; visible secondary ,sccumula- tion of soluble salts as crystals and concretions; dif- fuse wavy boundary. (2 to 4 inches thick) Cea 12-60"---Brown (LOYR 5/3) clay, dark brown (lOYR 4/3) moist; massive; extremely hard, very firm, sticky, plastic; . visible soluble salts as crystals, concretions3 anseams and streaks; calcareous; very strongly :alkaline. Range"iit Choracteiistics: Unless eroded, these soils have thin but con- tinuous albic horizons above the natric horizon. Thin Al horizons occur above the A2 horizon in some pedons. Depth to uniformly calcareous material ranges from 0 to 6 inches. Depth to the base of the argillic horizon ranges from 6 to 12 inches. Depth to continuous subhorizons of visible secondary salt accumulation ranges from 5 to 10 inches but such horizons are not strong enough to qualify as sa11c horizons. Mottling within the control section not due to the segregation of .Lime or other soluble salt ranges from no mottling to a few faint mottles with chroma of more than 2 in both matrix and mottles. Rock fragments ranF;e from 0 to 15 percent by volume in a major part of the solum and C horis:on above 40 inches and are mainly '~ to 10 inches in diameter. The A2 horizon has hue of SY through 7.SYR, value of 5 through 8 dry, 4 thrcugh 7 mo:lst, and chroma of 1 through 4. It ranges from mildly alkaline to very • strongly alkaline. The 82t horizon has hue of SY through 7.SYR, value