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inch mulch of sawdust is recommended. This may be applied at the time of planting or after the crop has been cultivated and hoed once or twice to destroy the weeds which develop early in the season. |
The greatest benefit is derived by allowing sawdust to remain on the surface as a mulch. In this position it conserves soil moisture, reduces the run-off of water during rain storms, helps maintain cool soil conditions during the hot summer months, and to a limited extent suppresses the growth of weeds. If the sawdust is worked into the soil by cultivation or hoeing the grower must be prepared to apply nitrogen to overcome a deficiency of this nutrient element. The one-inch layer of mulch is sufficient to give optimum moisture conserving and soil cooling effects. A thicker covering wilPbe of little additional benefit and will add to the problem of nitrogen deficiency when the material is ultimately incorporated into the soil. Thicker mulches, up to several inches deep, may be used for larger growing.
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