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The above varieties are preferred but do not constitute the only available adapted <br /> varieties. Seed availability problems associated with the above recommended varieties <br /> will require that the next best adapted variety or native/common types be used. The <br /> alternate selections will be made from regional sources. <br /> Site Variation Adaptability of Seed Mix #1 : <br /> Dry Sites: All species <br /> Moist Sites: Agropyron smithii, Bromus, Medicago, Poa, Dactylis. <br /> Cool Season: Agropyron, Bromus, Elymus, Oryzopsis, Poa, Sanquisorba, Ceratoides, <br /> Dactylis. <br /> Warm Season: Medicago, Atriplex, Sporobolus. <br /> Fine Textured Sites: Agropyron desertorum, Agropyron smithii, Bromus, Elymus, Medicago, <br /> Poa, Sanquisorba, Ceratoides, Atriplex, Dactylis. <br /> Coarse Textured Sites: All species except Agropyron smithii. <br /> PLS - is the pure live seed content or percentage found in bulk seed. PLS is calculated <br /> by multiplying the germination rate times the purity rate. Example: A seed tag listing <br /> alfalfa as being 99 percent pure and having a 91 percent germination rate would have a <br /> pure live seed rate of 90 percent as seen by: <br /> .99 x .91 x 100 = 90.09 PLS <br /> where a 5 lb/acre PLS drill rate would be adjusted to 5.6 lbs/acre bulk as seen by: <br /> 5 PLS lbs = 5.6 bulk lbs <br /> 90.09 PLS <br /> Because purity and germination rates vary with each growing season and seed producer, the <br /> seed rates listed in the Revegetation Plan are PLS rates (instead of bulk rates which vary <br /> greatly due to variations in purity and germination). <br /> 22-4 Revised 11/27/89 <br />