Hi John, 

I don’t understand your question. Did you type something incorrectly?

Gina

Hi John,

Thank you for clarifying your question. Here is a response from the University of Illinois Extension.

Can I add sawdust to the compost pile?

Yes, sawdust can be added to the compost pile. However, compost has a very high amount of carbon, so if you add sawdust, add nitrogen (such as a cup of 10-10-10 fertilizer per 25 square feet). To be safe, avoid adding sawdust from lumber treated with CCA (chromated copper arsenic).

Here is information from Penn State Extension.

Sawdust

Sawdust may be used as mulch. Composted sawdust may be incorporated into the soil. If it is incorporated, an application of three to four bushels for each 100 square feet of soil is suggested.

Acidity caused by using sawdust in soil is a minor problem. If soil is not already limed to the proper pH, it is a good practice to mix 3/4 pound of ground limestone into each bushel of sawdust.

Plant damage from the use of sawdust is more likely caused by nitrogen deficiency than by acidity. Nitrogen deficiency is most severe when soil microorganisms begin to use soil nitrogen to decompose fresh sawdust. Regardless of how saw-dust is used, some nitrogen also should be applied to the soil. For one bushel of dry sawdust, use any one of the following: one pound of nitrate of soda, 3/4 pound of ammonium sulfate, 1/2 pound of ammonium nitrate, or 1/4 pound of urea. Apply about half the nitrogen to the soil with the sawdust, and put the balance on in one or more applications during the growing season. This helps to reduce nitrogen loss from leaching and supplies a more uniform amount to the soil.

Here is a link to an article about composting that has information about adding sawdust. 

https://agrilifeextension.tamu.edu/library/gardening/composting

The most important thing is to NOT use sawdust from lumber that has been treated.

Happy composting!