now that you’ve read the label you know how to do it safely you know what product you’re using now you know OK there’s a rate in there on that label that you need to apply and it’s going to tell you on what type of an area you apply it is it per 100 square feet is it per a thousand square feet first thing you have to do is how big is the area you’re going to be applying to so this is where we get down to just good old simple oh my gosh geometry is it a rectangle is it a triangle or a circle if it’s a rectangle then we do the length times the width and that gives us our square feet if it’s a triangle we do the base times the height divided by two and if it’s a circle that’s 3.14 times the radius squared just break it down into simple shapes measure those areas and then you combine those shapes together to get your total area now you have your sprayer and you’re going to have to decide how much am I going to spray with this to cover that area or if it’s a large area how many times am I going to have to fill this sprayer to cover that area well that’s where your calibration comes in and so if we were going to be spraying with a pump sprayer we would first determine what width we’re comfortably spraying measure that after we’ve loaded our sprayer with a gallon of water spray that width for 15 seconds walking and measure the distance you’ve covered so say in 15 seconds you walk 25 feet and the width you were spraying was four feet that would mean in 15 seconds you covered a hundred square feet now you take your sprayer you make sure it’s all pumped up and charged and then you just go over to a clean bucket and for 15 seconds you spray into that bucket then we’re going to take and collect that measure it to determine how much we spray it in 15 seconds if we were going to be using a dry spreader we would first of all check our operators manual and they’ll give you they’ll give you some ideas on where to set this set it on the setting where you think it is if you’re fortunate enough to have a large tarp you can actually walk and spread this do a quick time count on it you can then collect that up weigh it and get a determination for what you’re doing and now you have an idea when you know what your area is how much you’re going to be spraying to cover a certain amount of area and this is all that calibration is