Анотація:
The subject matter of investigation in question is the character of production process of 5 species of monocultures of perennial fodder plants without applying of any kind of fertilizers. The investigation has revealed the initial increase of productivity depending on the number of plants and nutrition space per plant, followed then by its gradual decline, caused not by the changes in its nutrition space, but rather by the competition for natural resources. Productivity growth is only possible under the condition of external addition into the monocultures of the species under consideration of the necessary resources for the plants sustenance.