No-dig gardening creates healthy soil by adding layers of compost to the surface, rather than disturbing the soil by digging.

Finally, for the clay, subtract the height of the silt layer and then divide by the total height of your mixture once more. These percentages can then be plugged into the USDA Soil Texture Calculator.

All fluxes and processes removing soil, rock and dissolved materials result in chronological sediment layers that are accumulated and preserved at the bottom of lakes," says lead author, Dr. Jean ...