I spoke with someone out west about using chicken manure, but need some reminders. I am composting some of it, but wonder how long and then how much too use? How often also? Not a big garden, probably 10 x 30. Onions, tomatoes, kale, collards, cukes and JalapeÃ±os. Some dill for the wife. Does it need to be fully composted before using as a fertilizer?