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.
Acidic soil is any soil with a pH balance below 7. Soils that are below 7 are acidic while those with a pH balance above 7 are considered to be alkaline. Knowing the pH balance of the soil is important because certain plants and crops grow best in a certain type of soil.