What factors determine a turf variety's salt tolerance, and how would you manage a field with saline irrigation water?

• A. Species tolerance and root-zone salinity; management includes using salt-tolerant cultivars, improving drainage, leaching salts with adequate irrigation, and blending water sources when possible.
• B. Only the species tolerance of the cultivar matters; water salinity can be ignored.
• C. Root structure is the only determinant; management includes mowing lower.
• D. Salt tolerance is fixed for all turf and cannot be managed.

Answer: (A)

Salt tolerance in turf is determined by two main factors: the plant’s inherent genetic tolerance to salinity and the salinity level in the root zone. The root-zone salinity is shaped by the quality of irrigation water, soil drainage, and how you manage irrigation to either accumulate or flush salts from the root zone.

To manage a field with saline irrigation water, choose cultivars known to tolerate higher salinity, and ensure the site has good drainage so salts don’t accumulate. Use adequate irrigation to leach salts below the root zone—this means applying more water than the amount consumed by the plant so salts are flushed away. If possible, blend or source lower-salinity water to reduce overall salt input. Regularly monitor soil and root-zone salinity to adjust practices as needed. Salt tolerance isn’t fixed; it’s a balance between the plant’s tolerance and how you manage the soil-water environment.