Edaphology
The edaphology (of the Greek Edaphos , ground), also called agrology , is the study of the ground S as lived natural for the plants. With the Pedology, it is one of the two principal branches of the science of the grounds.
One speaks about an edaphic influence when the ground acts on the growth of the plants in all kinds of Biome S.
Edaphology or Agrology?
The two terms coexist but the scientific community uses mainly the term of edaphology. Cf the English wikipédia.
Characteristics of the grounds
Composition
The grounds constitute the roadbase of the Earth's crust. It is composed to 47% of Oxygène, 27% of oxides of Silicium (Silice S such as Sable, quartz and Silicate S such as Feldspath, Kaolinite), oxide 15% of Aluminum, then less than oxide 5% of Calcium, Magnésium, Sodium and Fer.
Acidity
The acidity of a ground, characterized by its pH is an important concept to determine the success of a culture. It is important to know that for each point with the fall on the scale of the pH, the acidity of the ground is 10 times higher. Thus, a ground of pH 5 is 10 times more Acide that a ground of pH 6 and one ground of pH 5,8 is 2 times more acid than a ground of pH 6,1.If a ground is too acid and that one wishes to cultivate plants there, it is necessary to neutralize it with a substance Alcali such as lime, Phosphate or wood ashes.
External bonds
in English
- Why Soils Study? URL last accessed 2006 - 04-16
- European Environment Information and Observation Network (EIONET) URL last accessed 2006 - 04-16
- SSSA Soil Science Glossary URL last accessed 2006 - 04-16
- USEPA Term list (theme=soil) URL last accessed 2006 - 04-16
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