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SUBIRRIGATION STUDIES <br /> Pit No. 1 <br /> Al - 0 to 14 inches; dark brown (10 YR 4/3) loam, very dark grayish brown (10 YR 3/2) <br /> moist; strong medium granular structure; hard; firm; neutral; clean smooth <br /> boundary. <br /> A2 - 14 to 25 inches; dark yellowish brown (10 YR 3/4) loam, very dark grayish brown <br /> (10 YR 3/2) moist; weak medium subangular blocky structure; slightly hard, very <br /> friable; neutral; gradual smooth boundary. <br /> A3 - 25 to 50 inches; dark yellowish brown (10 YR 3/4) gravelly loam, very dark <br /> grayish brown (10 YR 3/2) moist; massive; slightly hard, very friable; gradual <br /> smooth boundary. <br /> C - 50 to 72 inches; grayish brown (10 YR 5/2) gravelly loam, dark grayish brown (10 <br /> YR 4/2) moist; massive; slightly hard, very friable; slightly. calcareous. <br /> Notes: Primary root concentration in top 0 to 24 inches; few roots below 60 inches. No <br /> mottling or reducing zone within 6 feeet of surface. Coarse fragments 15-35% <br /> between 14 and 72 inches, increasing gradually near bottom of pit. <br /> Pit No. 2 <br /> Al - 0 to 7 inches; brown to dark brown (10 YR 4/3) loam, very dark brown (10 YR <br /> 2/2) moist; weak medium granular structure; slightly hard, very friable; neutral <br /> clear smooth boundary. <br /> A2 - 7 to 30 inches; grayish brown (10 YR 5/2) loam, very dark grayish brown (10 YR <br /> 3/2) moist; medium subangular blocky structure; slightly hard, very friable; <br /> neutral; gradual wavy boundary. <br /> A3 - 30 to 41 inches; grayish brown (10 YR 5/2) loam, very dark grayish brown (10 YR <br /> 3/2) moist; massive, very friable; neutral; gradual wavy boundary. <br /> C - 41 to 72 inches; dark yellowish brown (10 YR 4/6) gravelly loam, dark yellowish <br /> brown (10 YR 3/2) moist; massive; loose, very friable; neutral. <br /> Notes: Rooting concentration above 41 inches. No evidence of reducing zone. <br />