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PACE presentation featured on agronomy website

The American Society of Agronomy recently selected our presentation, “Temporal Variation in Golf Course Soil Chemistry: Case Studies from the Arid Southwest” to showcase on its website. The presentation, one of three selected from over 800 given at the recent Agronomy/Crop Science/Soil Science of America meetings, is being made available to the public, free of charge and allows the viewer to both see and hear the presentation. Visit the Agronomy Society’s Recorded Session website and go to the bottom of the page to select the PACE presentation.

Warm Fall 2003 Impacts Overseed in Southwest

The moans and groans started when September average air temperatures stayed stuck above 90F (with maximum temperatures hovering over 100F), and escalated to sobbing, kicking and screaming when they stayed high (rarely dipping below an average of 80F) through the first three weeks of October.  In short, all of the elements for a difficult overseed were in place during the Fall of 2003.  For while the objective of overseeding is to encourage the growth of cool-season turf types such as ryegrass and Poa trivialis, and to discourage the growth of bermudagrass, the weather this autumn conspired to create exactly the opposite effect.  The above-average weather this fall has been absolutely ideal for bermudagrass, which flourishes when air temperatures are between 75 and 100F.  These same warm temperatures have weakened the growth of ryegrass and Poa trivialis, both of which prefer lower air temperatures between 60 and 75F. When average temperatures climb to above 80F, ryegrass and Poa trivialis take a big dive. The survival of these cool-season turf types is further compromised by the fact that bermudagrass growth escalates rapidly at these temperatures, crowding out the weaker rye and Poa triv stands.

Letter describing the problem

PACE Clubhouse Edition prepared for HiLo GCSAA

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