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2020 Harrell's BA Guide Coastal Plains and SE
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or screening with a breast MRI,” Hunt says. She says those women should talk to their doctors about
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At Harrell’s we are dedicated to helping you succeed through quality products and valuable services. Our two employee-owner Ph.D’s work in cooperation with TurPh.Dudes all across the country bringing you the latest industry research to help you succeed day-in and day-out.
Dr. Raymond Snyder Director of Agronomy
Dr. Jeff Atkinson Director of Agronomy
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Use the tables on this page to assess the impact of irrigation water on plant quality
Table 1. Total salinity hazard classification guidelines for variable quality irrigation water based on Electrical Conductivity (ECw) and Total Dissolved Salts (ppm). Salinity Hazard Class ECw (dS/m) Total Dissolved Salts (ppm) Potential Injury & Management Requirements Low 2,000 Damage to plants with high tolerance to salinity may occur. Use salt-tolerant plants. Site must have good drainage. Excess irrigation for drainage.
Table 2. Salt tolerance of selected turfgrass species. Tolerance Species ECw (dS/m) ppm Excellent Seashore paspalum >10 6,500 Good St. Augustinegrass Zoysiagrass Bermudagrass Kikuyugrass 6-10 4,000 -6,500 Fair Perennial ryegrass Tall fescue Annual ryegrass 3-6 2,000 - 4,000 Poor 0.7 0 – 3 0.7 - 0.2 0 – 3 2.5
Severe problems
SAR
=
3 – 6 >1.2
3 – 6 1.2 – 0.3 6 – 12 1.9 – 0.5 12 – 20 2.9 – 1.3 20 – 40 5 – 2.9
3 – 6 1.9
6 – 12 2.9 20 – 40 >5.0
12 – 20