History
Historically the reasons for tilling the soil are to remove weeds, loosen and aerate the soil, and incorporate organic matter such as compost or manure into lower soil layers. In areas with thin soil and high erosion there is a strong case against digging, which argues that in the long term it can be detrimental to the food web in the fragile topsoil. While digging is an effective way of removing perennial weed roots, it also often causes seeds that can remain dormant for many decades to come to the surface and germinate. Digging can also damage soil structure, causing compaction, and unbalance symbiotic and mutualist interactions among soil life. Digging tends to displace nutrients, shifting surface organic material deeper, where there is less oxygen to support the decomposition to plant-available nutrients, which then need to be otherwise replenished. Digging is practiced traditionally in countries with old, deep, rich soils such as Western Europe, however traditionally there, this is followed by periodic resting of the soil, usually with an undisturbed cover crop.
Read more about this topic: No-dig Gardening
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—Albert Camus (1913–1960)
“Let us not underrate the value of a fact; it will one day flower in a truth. It is astonishing how few facts of importance are added in a century to the natural history of any animal. The natural history of man himself is still being gradually written.”
—Henry David Thoreau (1817–1862)
“All history is a record of the power of minorities, and of minorities of one.”
—Ralph Waldo Emerson (1803–1882)