2021-12-22_PERMIT FILE - C1981019 (2)

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2 Table 1 Colowyo - Salinity Study - 2021 Field Composition and Salinity Tolerances Field Field Subpart Acreage Dominant Species Common Name Relative Composition Species Salinity Threshold - Electrical Conductivity (dS/m) Salt Tolerance Adapted from Maas (1986) and Pettygrove and Asano (1985). Field Salinity Threshold - Electrical Conductivity (dS/m) Bromus inermis Smooth Brome 80% 3.5 Moderately Sensitive Thinopyrum intermedium Intermediate Wheatgrass 10% 7.5 Tolerant Medicago sativa Alfalfa 5% 2.0 Moderately Sensitive 5% 2.0 Moderately Sensitive Medicago sativa Alfalfa 80% 2.0 Moderately Sensitive Bromus inermis Smooth Brome 10% 3.5 Moderately Tolerant Thinopyrum intermedium Intermediate Wheatgrass 5% 7.5 Tolerant 5% 2.0 Moderately Sensitive 47.4 100% Moderately Sensitive 3.13 Medicago sativa Alfalfa 50% 2.0 Moderately Sensitive Pascopyrum smithii Western Wheatgrass 20% 7.5 Tolerant Poa bulbosa Bulbous Bluegrass 10% 3.5 Moderately Tolerant 20% 2.0 Moderately Sensitive Festuca arundinacea Tall Fescue 35% 3.9 Moderately Tolerant Juncus balticus Baltic Rush 25% 3.5 Moderately Tolerant Carex nebrascensis Nebraska Sedge 10% 3.5 Moderately Tolerant Poa compressa Canada Bluegrass 10% 3.5 Moderately Tolerant 20% 2.0 Moderately Sensitive Poa secunda Sandberg's Bluegrass 35% 3.5 Moderately Tolerant Carex sp.Sedge 25% 3.5 Moderately Tolerant Pascopyrum smithii Western Wheatgrass 25% 7.5 Tolerant 15% 2.0 Moderately Sensitive Medicago sativa Alfalfa 45% 2.0 Moderately Sensitive Pascopyrum smithii Western Wheatgrass 35% 7.5 Tolerant 20% 2.0 Moderately Sensitive 53.5 100% Moderately Sensitive 3.43 Festuca arundinacea Tall Fescue 45% 3.9 Moderately Tolerant Thinopyrum intermedium Intermediate Wheatgrass 45% 7.5 Tolerant 10% 2.0 Moderately Sensitive Bromus inermis Smooth Brome 40% 3.5 Moderately Tolerant Medicago sativa Alfalfa 30% 2.0 Moderately Sensitive 30% 2.0 Moderately Sensitive Bromus inermis Smooth Brome 40% 3.5 Moderately Tolerant Medicago sativa Alfalfa 30% 2.0 Moderately Sensitive Poa bulbosa Bulbous Bluegrass 25% 3.5 Moderately Tolerant 5% 2.0 Moderately Sensitive Festuca arundinacea Tall Fescue 45% 3.9 Moderately Tolerant Thinopyrum intermedium Intermediate Wheatgrass 40% 7.5 Tolerant Poa compressa Canada Bluegrass 10% 3.5 Moderately Tolerant 5% 2.0 Moderately Sensitive Bromus inermis Smooth Brome 35% 3.5 Moderately Tolerant Thinopyrum intermedium Intermediate Wheatgrass 20% 7.5 Tolerant Festuca arundinacea Tall Fescue 20% 3.9 Moderately Tolerant Medicago sativa Alfalfa 15% 2.0 Moderately Sensitive 10% 2.0 Moderately Sensitive Medicago sativa Alfalfa 90% 2.0 Moderately Sensitive Thinopyrum intermedium Intermediate Wheatgrass 10% 7.5 Tolerant Carex sp.Sedge 40% 3.5 Moderately Tolerant Phleum pratense Timothy 20% 3.5 Moderately Tolerant Bromus inermis Smooth Brome 20% 3.5 Moderately Tolerant 20% 2.0 Moderately Sensitive 158.1 100% Moderately Tolerant 3.72 Cox 10 25.3 3.75 Other Grasses and Forbs 11 22.1 2.43 Cox Summary Elkhorn & Streeter 12 4.1 3.25 13 30.2 14 11.6 4.28 Other Grasses and Forbs Other Grasses and Forbs Other Grasses and Forbs 3.01 Other Grasses and Forbs 15 7.6 3.93 Other Grasses and Forbs Elkhorn & Streeter Summary Proctor 1 25.3 5.33 35.3 2.98 59.6 3.90 7 40.9 3.20 Other Grasses and Forbs 2 13.8 2.60 Other Grasses and Forbs 4 27.3 5.21 Other Grasses and Forbs Other Grasses and Forbs Proctor Summary 6 35.9 2.55 Other Grasses and Forbs Other Grasses and Forbs