Pro Ag Services Inc. Gypsum products provide calcium and sulfur for a more healthy soil for your fields. Need better water penetration in your soil? Our gypsum does just that by balancing soil properties, increases soil aeration, leaches out harmful salts from the root zone, and reduces soil crusting.  Also correct PH problems with our Lime products.. Looking to add a new orchard? We can help with our innovative tree planters! Our GPS guided tractors along with our tree planting machines allow you to take the guesswork out of laying out your orchard and saves you time and money