Laserfiche WebLink
'USDA Soil Textures - unsuitable textures area: S -sand, LS -loamy sand, SC -Sandy clay: SIC -Silty clay, C -Clay <br />'The 3 -inch -plus % is estimated visually (by volume) by sweeping the face of the area being inspected, measuring out <br />the area's depth, and then estimating boulders, cobbles, and stones using USDA criteria. The 3 -inch -minus rock <br />fragment volume is estimated using sieve and collection pans. This is done by taking the thickness sample of the <br />material, placing it in a graduated sieve with a 2 mm final sieve size, and sieving the soil to the bottom of the sieve pan. <br />The volume of soil remaining in the 2 mm and larger sieves is then estimated for the 3 -inch -minus rock fragment. <br />These two component measurements are then summed to give the Rock Fragments value. <br />3 p values in the table represent the acceptable range that sample pH must fall between. <br />The thresholds in the table are formatted according to DRMS requirements. The notation indicates what values would <br />be outside the suitability threshold. For example, a rock fragment of more than 15% is unsuitable, thus the threshold <br />is written as ">15". <br />August 2013 (PR -08) 2.05.4(2)(d)-6 <br />