Answer: We all want to be right! Guess it's a case of how quickly the mulch breaks down, as to whether or not it depletes the soil of nitrogen. If you're using fresh sawdust, it wouldn't hurt to use a cup of nitrogen per 100 square feet of mulch material, to ensure that the decomposing wood doesn't take its nitrogen from the soil. To settle the entire question, how about piling up the fresh material and allowing it to decompose slightly before using it in the garden?
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