Probabilistic assessment of the role of the soil degradation main factors in Kuban rice fields

Abstract

As a result of reclamation systems for rice cultivation construction, the conditions of genesis and landscapes soil formation were radically violated. This led to the leaching of active humus and calcium, colloidal particles, nutrients from arable layer to underlying horizons, as a result of which there is a tendency to secondary salinization and solonization of soils. The development of the eluvial glue process and physicochemical parameters change of soils causes a change in the morphological soil profile. Currently relevant are preventing land degradation problems, maintaining and restoring soil fertility. In the article, the authors propose to characterize the rice irrigation system functioning mode from probabilistic point of view. They offer to evaluate the consequences of anthropogenic load, considering operational activities by Poisson stream of a certain intensity. This approach allows to consider uncertainty in terms of probability distributions. The function, characterizing soil quality S(t) was introduced. The function S(t) assumed to be monotonously decreasing. The probability R(S) of achieving a certain soil quality was considered. In case of minimum amount of humus Sm the soil is degrading. In these assumptions the average value expression and probability density of particular soil condition onset duration was received.

Key aspects of improving project management within the current socio-economic development

“…An additional argument in favor of including corporate management and engineering in the functions of the management company is the need for ongoing organizational, managerial and technological research aimed at identifying new solutions and making a decision on their implementation as part of the development of the object/project [3,4].…”

Optimization problem in mathematical modeling of technological processes of economic activity on rice irrigation systems

“…Rice is a thermophilic crop, for the full development of which the sum of positive air temperatures during the growing season for early maturing varieties is not less than 2500 ºС, mid-ripening -2700 ºС and late-ripening -3200 ºС. Average daily temperatures should be 13-17 ° C in the germination phase, then 18-21 ° C in the tillering phase and be within 13-19 ° C in the phase of milky and waxy ripeness [8].…”

Implementation of «lean manufacturing» technologies in rice irrigation systems of the Krasnodar region

“…This is due to the fact that rice cultivation requires special engineering irrigation systems, which include a number of hydraulic structures, discharge and irrigation canals of various command orders, water supply and water control structures, shut-off and control valves and many other auxiliary structures and structures. All of the above complicates the technological process and increases the cost of rice production, as well as carrying out year-round maintenance and repair work on rice irrigation systems [2].…”