Page 23 - GM Fall 2025 flipbook

How can we apply this to some soil test examples?
Start by reviewing the Standard Soil test (chemical extraction) and then examine
the Saturated Paste test to ensure that soluble potassium exceeds sodium, which
minimizes sodium-induced wilt. Confirm that there is sufficient soluble calcium (>
40 ppm) to positively enhance soil porosity. Following the flowchart above can
help with interpretation.
TIPS FOR TAKING A SOIL TEST
1. Determine the soil sampling depth. For established turfgrass, sample at a depth
of 3 inches (8 cm). Mark your soil test probe depth to ensure uniform samples.
Why a 3-inch depth? This is where established turf roots absorb moisture and
nutrients. The area where the plant takes up moisture is also where it absorbs
nutrients.
 Note: If you are renovating an area and planting new seeds, consider sampling
at a depth of 6 inches, which allows you to amend the soil accordingly.
2.  Take multiple sample plugs from the area you intend to treat.
 The more samples you collect, the more accurate your results will be. After
gathering numerous samples, mix the plugs thoroughly and send 1-2 cups of
soil to the testing laboratory. Many laboratories require 2 cups of soil, so
adjust this quantity according to the laboratory’s instructions.
Understanding each element’s
role in the turfgrass system is
crucial for interpreting a soil
analysis. By knowing how these
elements are quantified in various
tests and focusing on a few key
values, you should be able to
interpret a soil test and paste
extract in just a few minutes to
determine what actions, if any,
can improve nutrient efficiency,
thus enhancing performance
conditions at your golf course. GM
The soil test and saturated paste analysis case study examples referenced in this article can be accessed
via the CGSA website at https://golfsupers.com/greenmaster.html.
GreenMaster • CGSA •
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