Translations:Benutzer:Arian/Klett-Mini-Test/1062/en

Looked at more closely, this effect makes itself felt in a multitude of details within the root zone. In red clover, for instance, one can observe how the number of nodules on the roots — arising through the endogenous symbiosis of the clover with rhizobia, nitrogen-fixing bacteria — declines under continued applications of nitrogen salts. As a result of the high nitrogen concentration in the soil solution, the nitrogen-fixing capacity of the root diminishes; it loses, degree by degree, its capacity for symbiosis.