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.
Hereâs How To Test if Soil is Acidic Or Alkaline With Baking Soda and Vinegar. First you need two samples of soil in small containers, half a cup of vinegar and half a cup of baking soda. 1. Take your first soil sample and pour in the vinegar. If the soil begins to fizzle and bubble then you have alkaline soil.