According to the TSB (1978) experiment is called the "method of cognition, with which controlled and managed conditions is studied phenomenon reality "(v.30, p.6).Geographically encyclopaedia (1988) indicates that the basic principle of extreme methods of physical geography is to monitor changes occurring in the facility, phenomenon or process under the influence of factors, intensity or duration of which can change at will experimenter. According to E. Neef (1974), geography, may not experiments methods of exact sciences.

In contrast to these authors there is a point of view on the experiment, significantly expanding its field of activity.Sachava (1969) Considering that, in Geography has a right to existence is the broad interpretation of the concept "Experiment", combining a detailed study of the nature of geographical phenomena quantitatively accounted conditions. According to him, "monitoring change in the nature under the influence of - the factor that controlled researcher, is one possible method of experimental geography whose use in all kinds of experimental work does not necessarily. (Sachava, 1969) From the perspective of authors such Semenov, Mamitko (1988);Semenov and others (1987); Snytko and others (1987.1989), the term "experiment" can be compared with such processes in the ecosystems of the study, when the experimenter may, discretion to ask one of the parameters.

The process of obtaining data in the field and laboratory conditions forced change in the nature and extent of the impact of one of the factors be called an experimental simulation. Recently methods active field and laboratory experiments,sufficiently robust soon receive information about the nature and direction of geochemical processes by changing some parameters, are widely distribution.

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