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*Suitability <br />Grouping <br />lSite <br />Soilq <br />Index <br />Adjective <br />Rating <br />Remarks <br />IT 1 <br />Deep and moderately deep weakly developed <br />Above <br />Good <br />Precipitation over 20" on <br />Podzolic and Gray wooded soils on north <br />facing slopes. Slopes are often steep. <br />65 <br />north and east slopes. <br />Examples of mapping units: 33A1, 32A1, <br />33M1, 33A2. 32A2. 3y2. <br />DF 2 <br />Moderately deep and shallow, weakly <br />developed podzolic and gray wooded soils <br />on north and east facing slopes. Examples <br />of mapping units: 33J2, 33J3, 33A3, 32 <br />33M3. <br />50 <br />Medium <br />Precipitation 18 - 20" lower <br />and mid slope positions. <br />DF 3 <br />Steep, shallow and stony weakly developed <br />podzolic and gray wooded soils - moisture <br />relations are poor - Examples of mapping <br />unite: X3A, X3M, 33A3. 32A3. <br />40-50 <br />Low <br />Often found on ridge tops or <br />slopes of over 50%. Slopes <br />are often convex in shape. <br />USDA <br />Ii CONSERVATION SERVICE <br />COLORADO <br />WOODLAND SUITABILITY GROUPINGS <br />for <br />DOUGLAS FIR <br />Technical Guide <br />Section II -F Voodland <br />Resource Area: 48-49 <br />January 1, 1966 <br />*Note: Douglas fir may be associated. with Concolor (white fir) Englemann spruce, Subalpine fir, Blue spruce, <br />lodgepole pine and ponderosa pine. The site is mapped as Douglas fir when it makes up over 4O of the <br />type and other species are not present in a greater percent. These suitability groupings are for use <br />only in those areas where Standard Soil Surveys have not been completed or where other Woodland Suit- <br />ability groups have not been established. <br />