Soil Triangle
thingiverse
A Reddit user requested a soil triangle, so I drew one up based on his input. The soil triangle is a useful tool for determining the pH level of your soil and what adjustments you might need to make to get it just right. The soil triangle works by having three sides: acidic, neutral, and basic. You simply plot your soil's pH reading on the side that matches your test result, and then look at where the line intersects with the other two sides to determine what type of soil amendments you should add or remove.
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