Translations:Benutzer:Arian/Klett-Mini-Test/781/en

of so-called mineral nutrients, pesticides, herbicides, growth regulators, and so on, calculable maximum yields are achieved year after year even on soils that are by nature little "gifted" — that is, poor soils. With this, the qualitative aspect of soil fertility — for example, the site-specific or provenance-specific value, or the nutritional-physiological quality of foodstuffs — has become obsolete. The concept of yield capacity refers largely only to agrotechnological questions; the concept of soil fertility, however, refers to the question of an art of farming yet to be developed anew. This requires, as indicated above, that the view be widened to encompass the essential side of the world, to the more intimate workings of forces in the household of nature.