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Those dots are indicative of the turfs response to aeration. Aeration will come up lots and there is always plenty to talk about but for now I wanted to show the obvious benefits of aerating greens. Everybody knows that plants leaves absorb carbon dioxide and release oxygen (photosynthesis) but sometimes people forget that the plants also need to absorb oxygen to make the energy (respiration) for cellular reactions occur. I am going to be fast and loose with the facts but a fairly "true" statement is all parts of the plant need to absorb oxygen in order for the plant to survive. Roots absorb oxygen to help fuel the transportation of nutrients into and throughout the plant. Some nutrition can be foliar absorbed but strong, healthy turf needs a strong, healthy, functioning root system. Each green dot seen in the first picture is the exact spot where an aerator tine penetrated the turf and left behind a open column down which water and air can travel. I used a cup cutter to "slice" through one of these columns to reveal the growth of roots over five inches deep on a mostly Poa annua green. If you look back to "Bent vs. Poa" post in February you can see pictures of Poa annua roots that are barely two inches. If you double click the following picture you can get a better look. Yeah, I know it is not a great picture but for this green, number 7, that is pretty impressive. You'll just have to take my word for it.
