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<br />APPENDIX 9-3 IContinuedl <br />Roots: Number Type <br />Few VF Very Fine <br />Com ICommonl F Fine <br />Many M Metlium <br />C Coarse <br />Roots are tlescribed in terms of a specified size Ilypel antl quantity Inumberl. The size classes are: <br />Very Fine: Less than 1 mm in diameter <br />Fine: 1 to 2 mm in diameter <br />Medium: 2 to 5 mm in diameter <br />Coarse: 5 mm or larger in diameter <br />Pools larger than 10 mm in diameter may be tlescribed separately. <br />Guaniity classes or roots are tlefined in terms of numbers of each size per unit area--1 square centimeter for very line and fine roots, and 1 square decimeter for medium and coarse roots. All roots smaller than 10 mm in <br />diameter are describetl in terms of the following quantity clessos: <br />Few: Less than 1 par unit area of the specified size <br />Common: 1 to 5 per unit area of the specified size <br />Many: More than 5 per unit area of the specilietl size <br />Roots are described as to number first, and type second. <br />flock Fragments: All rock fragment percentages 1% by volume) are taken Irom the A23T@ field soil profile tlescriptions form far each sampletl profile. lithologic modifier types I9ravelly, channery, etc.) era also <br />taken from the A23T@ lield soil profile Description loans for each sampled profile. <br />Reaction: Ellervescence Reaction IAbbravl: Reaction: pH <br /> Str. Acid Strongly Acid 5.1 - 5.5 <br /> Motl. AciO Moderately Acid 5.6 - 6.0 <br />NE Non-Eflervescent SI. Acid Slightly AciO 8.1 - 6.5 <br />SE Slightly Effervescent Neutral Neutral 6.6 - 7.3 <br />EM Moderately Eflervescent Mild. Alk. Mildly Alkaline 7.4 - 7.8 <br />ES Strongly Effervescent Mod. Alk. Moderately Alkaline 7.9 - 8.4 <br />EV Violently Effervescent Strong Alk. Strongly Alkaline 6.5 - 9.0 <br />Horizon Boundaries: Distinctness Topography <br />A Abrupt I <2 cm thick) 5 Smooth Itha boundary is a plane with few or no irregularities) <br />C Clear 12 to 5 cm thick) W Wavy Ithe boundary has undulations in which depressions are wider than they are deep) <br />G Greduel 15 to 15 cm thick) I Irregular (the boundary has pockets that are tleeper than they are witlel <br />9-3-23 <br />