Pasture Health, Soil What’s Soil pH and Why Do I Care? Rachel Gilker July 15, 2013 Soil pH is a measure of acidity. It is important because it affects the availability of nutrients for your plants. Soil pH is supposed to be in a certain range, like a speed limit on a road. Go too faAll the grazing management tips you need Subscribe to read this article and over 2,500 more! Subscribe today! If you're already a subscriber, log in here.