Calvert Crossing
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PGA News

Aerification

It’s a perfect, sunny morning and you’ve just reached the first green in regulation. You feel great and you know that you’re within birdie range. Then, you see them, those little holes in the green. Arrggh! They have just aerified the course, and it’s going to ruin your round, right?  Well, maybe not. Consider the fact that PGA tour legend Tom Watson shot a sizzling record 58 at his then home course, Kansas City Country Club, just days after the greens had been aerified.  Consider also that aerification is merely a short-term disruption that has long term benefits for golf courses. When you see them, remember that without those little holes, the greens would eventually die. We normally aerify 3 times a year, last year we chose not to aerify in September, and we are now starting to see the effects of not aerifying.  Preventative maintenance is an integral part of successful golf course management. Golfers view aerification as an inconvenience that take the greens out of play for a day, pulling cores from the green and leaving holes can affect putting for many days before healing. To add insult to injury, aerification is best done in our part of the country during spring, mid-summer, and fall, at the height of the playing season and when most greens are in prime condition.  Aerificaton achieves three important objectives. It relieves soil compaction, it provides a method to improve the soil mixture around the highest part of a green’s roots, and it reduces or prevents the accumulation of  excess thatch. Like so many things, the quality of a good putting green is more than skin deep. In fact, the condition of the green has a lot to do with what goes on below the surface. In order for grass to grow at 3/16 inch, it must have deep, healthy roots. Good roots demand oxygen. In good soil, they get oxygen from tiny pockets of air trapped between soil and sand particles. Over time, the traffic from golfers feet (as well as mowing equipment) tends to compact the soil under the putting green – particularly when the soil contains a lot of clay. When soil becomes compacted, the air pockets on which the roots depend are crushed, and the roots are essentially left gasping for air. Without oxygen, the grass plants become weaker and will eventually wither and die.  Aerification is a mechanical process that creates more air space in the soil and promotes deeper rooting, thus helping the grass plants stay healthy. In most cases, its is done by removing half-inch cores from the compacted , allowing for an infusion of air and water that brings a resurgence of growth. The spaces are then filled with sand “topdressing” that helps the soil retain air space and makes it easier for roots to grow downward.  Finally, growing of turf adds to a layer of organic matter on the surface. This layer, called thatch, is an accumulation of dead stems, leaves and roots. A little organic matter makes for a resilient green, but too much invites disease and insects. Top dressing with sand can prevent thatch buildup, and aerification is one of the best ways to reduce an existing layer and prevent an excess of thatch from becoming established.  The bottom line is that aerification is a necessary practice. As the season progresses, you will see that we are aerating greens, tees, and fairways. But, before you curse the superintendant for ruining you day, just think of Tom Watson. 

November Newsletter

 

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