Dynamics and Availability of Major Nutrients in Soils

  • Konrad Mengel
Conference paper
Part of the Advances in Soil Science book series (SOIL, volume 2)

Abstract

In his book The Organic Chemistry and Its Application on Agriculture and Physiology Liebig (1841) stated: “Als Prinzip des Ackerbaues muβ angesehen werden, daβ der Boden in vollem Maβe wieder erhalten muβ, was ihm genommen wird” (it must be borne in mind that as a principle of arable farming, what is taken from the soil must be returned to it in full measure). This was the theoretical basis of a development with far-reaching consequences. According to this principle, fertility of many soils could be maintained or even restored. The efficiency of crop production was tremendously improved, as evidenced by the yield attained per unit of land. At the time Liebig began his studies in Germany 1 ha of cultivated land produced food for about one person. Today’s figure is 4.5 people. During this development, fertilizer use also increased considerably. Future crop production, whether in countries with a highly developed or less developed agriculture, will be based on the same principle as that stated by Liebig: maintainance and restoration of soil fertility by substituting the plant nutrients exported with crops from the field or lost by other processes by means of fertilizer application. Besides this, as already has been done in the past, new cultivars should be bred with a higher nutrient efficiency (Mengel, 1983).

Keywords

Biomass Corn Urea Calcite Assimilation 

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© Springer-Verlag New York, Inc. 1985

Authors and Affiliations

  • Konrad Mengel
    • 1
  1. 1.Institut für PflazenernöhrungFederal Republic of Germany

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