Method of replications amount determination under comparison of two samplings dependently on average values of samplings and their standard deviations is presented in this article. Example of samplings comparison by the criteria of Student has been shown.

Means of information safety of a hardware-software complex of the computer network of an enterprise play an important role at the realization of the general strategy and tactics of the enterprise safety. Uninterrupted operation and stability of a program work and hardware maintenance, confidentiality of the personal information, a degree of protection against non-authorized access depend on competent realization of the accepted policy in the field of information safety for observance of commercial interests of an enterprise. Results of the problems analysis of information safety at use of information technologies are presented in this paper.

Water calculations with an account of quests of water users and water consumers with the supply situation 50, 75, 95 % were done and their results on whole water complex on the branches of economics.

The idea of systemic generalization of mathematics was substantiated by the author and the first step on its realization was done: variant of systemic information theory was proposed. There was done an attempt to do the second step in the same way: one of the possible approaches to the systemic generalization of mathematic understanding of set on the conceptual level, namely the approach, based on systemic information theory. It is supposed that this approach can become the basic one for systemic generalization of set theory and creation of mathematic theory of systems.

Demand to the method of statement of problem is substantiated and degree of known methods correspondence to these demands is determined, the most available method of problem decision is chosen by the substantiated criteria, the essence of chosen problem and the method of its application to decide the problem in view, including synthesis of semantic informational model and evaluation of its adequacy are described in brief as well.

Prognosis of industrial results of some or other agro technologies application and support of decision taking by choice of such varieties of grains and rational agro technologies for their cultivation, which with most probability would show the given desirable industrial result in advance are cited in the article.

Brake-off of a corn-cob from a stem occurs in expense of a corn-cob blow and pedicle distention in modern husker-shredder corn-harvesters. Any mechanical impact is connected with deformation of a corn-cob. Forces destroying connection between grains with rod appear under its deformation. Condition under which mechanical damage of a corn-cob occurs is considered in the article.

Problems of biometric evaluation of morphological features of clones for identification of variety group Merlo genotypes were considered in the paper.

Complex of models for management of production effectiveness in farms for mono product, multi product and mono processing types was proposed in the article.

Number of population in Krasnodar increased in 1,8 times, but number of seats in cinemas decreased in 2,4 times in comparison from 1970 to 2007. Accessibility radius of the most cinemas doesn’t cover all existing districts of Krasnodar. Substantiation of cinemas types and their amount with an account of norms are given in the article.