For you guys that get your employees to put out the fertilizer, how do you get them trained? I will be on the property with them, and will be watching them, but no longer want to be the one pushing the spreader and pulling the hose. With me supervising, it is not necessary in NC for them to be certified. I am having a hard time teaching them the correct width or spacing between passes with the spreader, and the correct speed with the spraying. Is there anything I can tell them to make them understand, or do i just need to be patient and let them learn by experience?