To find out when your post office is open: 1  Enter your location in Find a Post Office. 2  A map will appear displaying post offices near you. 3  Select Hours and Services. 4  Select your desired location to view the hours of operation.
Testing Soil pH with a Commercial Test Probe. 1  1. Dig a small hole in the soil. 2  2. Fill the hole with water. 3  3. Insert the test probe into the mud.  4. Hold it there for 60 seconds and take a reading. pH is usually measured on a scale of 1-14, though the tester may not include this entire range.
Soil acidity and liming. Soil pH is a useful indicator of the relative acidity or alkalinity of a soil. The pH scale ranges from 0 to 14, and the soil is assigned a value from the pH scale to describe the acidity or alkalinity.Since pH 7 falls midway along the scale, pH values that are equal to 7 are said to be neutral.n return, the lower the pH value, the greater the acidity of the soil will be. The concentration of hydrogen ions in the soil solution is directly proportionate to and in equilibrium with the hydrogen ions retained on the soilâs cation exchange complex.