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have been published to support the claim that sawdust contains toxic substances which will will inhibit plant growth. There are no known chemicals which are commonly found in either hardwood or softwood sawdust which would be i njurious to plants. The sawdust of some trees contains large amounts of tannins and terpenes. These appear to have no serious detrimental effects, however, because normal crops have been produced on soils to which large amounts of tannin or tannin-containing materials have been added. Sawdust May Cause Nitrogen Deficiency..
It is a well known fact that a deficiency of nitrogen may develop if appreciable amounts of carbonaceous organic materials are mixed with soil* This deficiency develops because the bacteria which decompose the organic matter tie up the soil nitrogen in an unavailable form. Therefore,when sawdust is added to the soil a supply of readily available nitrogen should also be applied. Enough fer
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