Home > Lawn & Garden > Home Gardening > Equipment > Sprayers > Calibrate Yard Sprayers for Accuracy, LSU AgCenter Engineer Advises If you apply liquid fertilizers and pesticides to large areas of your lawn, you need to be accurate. That means calibrating your sprayer to be sure you apply the correct amount of material for the area you’re treating, says Dr. Dick Parish, an engineer with the LSU AgCenter’s Hammond Research Station. Ounces Equal Gallons: Sprayer Calibration [Image: spray] A simple but accurate way of checking the output of your sprayer is the H 128 method of sprayer calibration. An Easy Herbicide Sprayer for Turf [Image: herbicide sprayer for turf] A small, hand-held sprayer is available that will spray herbicides uniformly and with a relatively uniform droplet size. Spraying Liquid Fertilizers and Pesticides on Home Lawns [Image: boom-type sprayer on tractor] Non-powered wheeled sprayers offer homeowners an easy and relatively inexpensive way to apply the correct rate of fertilizer and pesticides uniformly to home lawns.  more articles... Sprayers for Home Gardens [Image: trigger sprayer] Whether you have a few rose bushes beside your house or a half-acre garden, you will need a sprayer to take care of your plants. Sprayer Calibration [Image: boom-type sprayer] Calibration of vehicle-mounted boom-type sprayers is simple and can be very accurate. Calibration of hand-carried sprayers is much more subjective, but it is simple to do.