Often, ecological studies set the stage for deeper environmental analysis. In contrast, only a thorough knowledge of the species that make up the biocenosis to better understand the relationship in a given ecosystem.
Even normal human activities on agricultural lands provide rich opportunities for environmental observations. However, infer from this, may not always be required. Meanwhile, just as in agricultural landscapes is particularly easy to carry out systematic field trials. In accordance with the methodology used in the physiology of development, but in entirely different, more complex systems can be carried out experimental intervention by isolation of individual parts, excluding important factors administration (implantation) or replacement (transplantation) parts of the system. This provides the variability of one factor or process with a constant other phenomena. Thus, we can get an idea of ​​compensatory and regulatory processes of an entire ecosystem, and thus the rich life of the landscape. Experiments with the cultivation of individual species in controlled conditions - this is nothing like isolation parts of the whole system. Violations of system can be caused, for example, the use of chemical pest control, tillage, flooding, mowing grass. System response to the introduction of foreign parts can be traced in the soil after application, after instillation of falling at different depths or over large areas, after the introduction of new species for the area, such as in biological methods of pest control. "Replacement" of entire layers of the ecosystem is the result of vegetation change on adjacent fields at effects of the changes.