Soil Type and Rate of Drainage can be determined by a soil test from USU, or by digging a hole 1 foot deep and one foot wide, filling it with water, and timing how long the water takes to drain out. If drainage takes 2 hours or more, refer to the Soil Drains Slowly column. If it drains in ½ - 2 hours, refer to the Soil Drains Well column. If it drains in less than 20 minutes, refer to the Soil Drains Fast column.