Adding organic matter to lawn
What's the best way to add/increase organic matter in a 3 year old lawn? I have Palmetto St Augustine. My organic matter is 1.6%.
I have peat moss, peat humous, and compost. What's the best way to apply (I have 9,000sqft). And what's the best way to get it worked in and not just run off when it rains?
I'm new to this so thanks for any suggestions.