the correct ph level allows the plant to take in the nutrients that it needs to grow well, the only way to know the ph level is to have a soil test done, your county extension agency will do this for free. most of the time your ph will be to the acidic side of the scale and you need to add lime to correct this. the test will tell you how much lime to add and the correct amount of fertlizer that needs to be added. to your question what will it do for you, it will make the food plot be the best it can be if it gets the right amount of rain.