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R <br />• <br />Windbreak Suitability Group 4L <br />Descriotion• <br />Somewhat poorly, moderately well, and well drained clayey soils <br />with a 4-6 inch loamy surface mantle. <br />Limitations• <br />High clay content below the surface mantle affects the selection <br />and growth of species, due to slow water intake and the potential <br />for frost heaving. <br />Soils• <br />Baca (L, SL) <br />Daws <br />Gaynor (gravelly) <br />Heldt (SL) <br />Iliff <br />Manzanola (L, STCL) <br />i~ <br />Nunn (L, LS, SL} <br />Platner <br />Rago <br />Renohill <br />Ulm {L, SL) <br />ADAPTED SPECIES FOR WINDBREAK GROUP 4L <br />MEASURED OR ESTIMATED HEIGHT IN FEET AT AGE 20 <br />BY MOISTURE (ANNUAL PRECIPITATION) SUBGROUP <br />PERM. <br />COMMON NAME 12-15" 15-18" 18"+ IRRIG. <br />Everareen Coniferous Trees: <br />Austrian pine 15 18 26 <br />Blue spruce 16 24 <br />Douglas-fir 12 16 23 <br />Eastern redcedar 10 12 14 21 <br />Pinyon pine - 8 l0 14 <br />Ponderosa pine 12 15 17 26 <br />Rocky Mtn. Juniper 9 11 13 21 <br />Scotch pine 15 24 <br />White fir 12 16 21 <br /> <br />- .~ <br />TGN #327 19 SCS, COLORADO, OCTOBER, 1992 <br />