Some crops do better in more alkaline soil. The problem is, most gardeners don’t know how to test the pH levels of their soil. There are pH tests that you can buy in your local grocery or garden center, but these can be expensive and may not be accurate. A simple way to go around this is to collect two soil samples from different parts of your garden. Add ¼-½ cup of vinegar to one container for each location. If it bubbles, it means the soil is alkaline (pH is above seven). If it doesn’t, mix equal parts water and baking soda and add it to the other samples. If it bubbles, then the soil is acidic or having a pH level lower than seven.