Correct pH reading is very essential to achieve optimum results. Crops such as vegetables, flowers and shrubs, trees, weeds and fruits are pH dependent and rely on the soil solution to obtain nutrients. Soil pH value plays an important role in the production of quality crops. Most crops cannot survive in soil that is too acidic or alkaline. Knowing the nutrient levels in your soil is to determine what you need to add to your soil to maximize the growth of your plants.