I want to work on getting my license but I have finished the study book and it doesnt say anything about turf maintenance and fert. I want to offer perimeter pest control and fertilization next season but dont know where to start. I dont know of any books, videos, websites, local dealers. Dont know about different fert, liquid or granular form.... SOO many simple questions that need to be answered before I start working with chemicals on my own property. Where did you start? How do you learn what chemical is needed and when/how often to apply it???? Where did you learn about the mixture/release numbers? ( 20/10/90). Not sure if thats a real number but you get the idea.