Healthy soil makes healthy roots. Roots like aerated soil full of nutrients and water. Roots are better able to absorb simple, time-released nutrients provided in organic form than they are synthetic chemical fertilizers. Synthetic fertilizers only provide large molecules of a few basic nutrients, usually derived from petroleum, and actually kill earthworms. Soil that has been chemically treated has poor tilth.
Healthy roots make healthy plants.
Plants that cannot absorb the proper, balanced amounts of nutrients grow weak, unable to provide the necessary ingredients for proper stem and leaf development. Without a healthy root system, many plants will be easily lost to erosion, since there are no roots in the area to hold the soil in place. Soil with poor tilth erodes quickly. Healthy plants resist drought, disease, and pests. Try it yourself.