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Show MOISTURE FOR ROAD MAKING There Is Certain Water Content at Which Soil Packs Hard Remove All Grass and Weeds. Road making is largely a matter of -moisture control. When soil contains too much water it becomes mud, and -when it has too little moisture it becomes be-comes dust. But there is a certain moisture content at which soil packs hard. . And this is just about the amount of moisture that a soil will hold readi!?-. This usually can be maintained in a road that has good drainage, that is well crowned so the water will run off when it rains and that is free from grass and weeds. Tiiese if allowed to grow, vi)l soon draw the moisture out of the soil and so remove the binding 'material. |