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.
How to Reduce the Alkalinity of Soil. 1  Test the soil to discover its alkalinity level. Gather soil samples from the garden area. 2  Review the results of the soil test to determine the soil's pH. 3  Add elemental sulfur at a rate of 0.1 pounds per 10 square feet of loamy soil for every one-half unit you wish to lower the pH.