Record how fast each soil type or amendment drains. Collect and measure the amount of water that drains from each soil type. Mix various soil amendments with soil types to improve or modify the drainage. Re-run the experiment. Mix various soil amendments with soil types to improve or modify the drainage.
Re-run the experiment.
Until the late 1800's, most of central and northern Illinois soils were poorly drained. Settlers changed this by installing underground tile drains and ditches, which dried out much of the area.