It is considered a mathematical model for monitoring moisture conditions of agricultural land. The model quantifies the influence of soil moisture conditions on the productivity of winter wheat and corn for grain in the Odessa region.
Method of mathematical modeling of radionuclide activity forming in the system “water – soil – plant – product” was described. Contamination quantitative assessment of total biomass, seeds and products of their processing on the South of Ukraine was received on the example of sunflower (Heliantus annus L.) agrophytocenosis
Whit a help of mathematical model the estimation of agroclimatic resources of productivity of Ukraine territory as it applies to growing of cabbage is executed .It is resulted the analysis of the waterthermal mode of sowing of cabbage and its meteorological possible productivity.
The results of the research of the dynamic model block of winter hardiness formation by the plants of winter wheat in the Southern Steppe of Ukraine are presented, with the Odessa region as an example. The parameters of the model block of winter hardiness formation by the plants of winter wheat according to laboratory and field experimental observations of agrobiological indexes dynamics are identified. The model describes the process of hardening of winter wheat plants under the effect of agrometeorological conditions of autumn – winter period and can be used for forecasting of their wintering both for a particular field, and the Southern Steppe of Ukraine. The error between the calculated model values and the actual data obtained in the laboratory and field experimental observations on the date of ending of autumn vegetation is 7 %.
Considered changing agro-climatic conditions of grapes cultivation in the northern Black Sea region. The estimation of winegrapes phenology offset in the implementation of climate scenarios. Based on the model of grapes productivity forming was done assessment of the yield due to possible climate change.
In the article different eventual-difference charts are considered at the design of the unset turbulent diffusion of dredge in a water-course in the flat raising of task. The analysis of the got decisions is executed, the estimation of error of calculations is given and the initial parameters of model are optimized. Led recommendation for implementation of engineering’s calculations.
Using mathematical model, the estimation of the productivity of agro-climatic resources in Ukraine in relation to the cultivation of tomatoes has been performed. The analysis of the hydrothermal regime of crops of tomatoes and of the increments of different ecological types of yields has been performed.