Soil P, pH, and salinity are a few things that likely vary by depth in your rootzone. I've started recommending that 20% of putting greens tested be done with a sample divided at the 5 cm depth. Send the lab a 0-5 cm and 5-10 cm depth sample from that green, rather than the standard 0-10 cm depth sample.
I discussed this blog post: www.asianturfgrass.com/post/r...
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Негізгі бет Ғылым және технология Checking phosphorus gradients on putting greens with an upper and lower rootzone sample
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