Comparison of Sprint and iron-based fertilizers for improved turf quality

March 23, 2005

Summary: A replicated small plot study was conducted on greens height bentgrass to evaluate the performance of iron-based fertilizers for improved turf quality.  Based on the results, the following conclusions were drawn:

All three Becker-Underwood products resulted in significantly improved turf quality when compared against the non-treated check, as well as against a ferrous sulfate positive control

• The two experimental formulations (DPTA-507A and DPTA-507B) performed as well, and on some dates better than the Sprint 330 formulation.  However, the performance of DPTA-507A and 507B were equivalent.
• Improved turf quality was evident for up to 10 days post-treatment with the three BU products, but by 15 days after application, differences were impossible to assess visually.  Thus, at the rates tested (0.22 oz iron/1000 sq ft), re-application may be necessary every 10 - 14 days in order to maintain improved turf quality. Alternatively, higher rates may increase the duration of the effect.
• All formulations handled well, going into solution easily and leaving no residue on the screens.

Printable version of full report

Principal Investigators: Wendy Gelernter, Ph.D. and Larry J. Stowell, Ph.D., CPPP, CPAg

Cooperator: Bruce Duenow, La Jolla Country Club

Sponsor:  Larry Butler, Becker-Underwood