Using Sawdust As A Source Of Organic Matter For Soil Or As Mulch.
Saw dust would not be a good choice, especially for a mulch,as it will blow away in the summer and get too wet in the winter by holding the water.
In the soil as a source of organic matter,it will take a lot of the nutrients out as the bacteria try to break it down.This is because of the fibres in the wood which goes to make up the sawdust.
Your best solution would be to compost it for 2 years and then use it as organic matter for your soil.
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