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
Famous quotes containing the word history:
“There is no example in history of a revolutionary movement involving such gigantic masses being so bloodless.”
—Leon Trotsky (1879–1940)
“History, as an entirety, could only exist in the eyes of an observer outside it and outside the world. History only exists, in the final analysis, for God.”
—Albert Camus (1913–1960)
“History ... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind.
But what experience and history teach is this—that peoples and governments have never learned anything from history, or acted on principles deduced from it.”
—Georg Wilhelm Friedrich Hegel (1770–1831)