Modern technologies are not used effectively enough in the current structure of the agro-industrial sector. Remote sensing, as a process of collecting information in a noncontact way, allows providing interested users with objective and detailed information. Currently, it is one of the rapidly developing industries of the fifth technological revolution. The use of aircraft-or satellite-based sensors makes it possible to obtain panoramic images of high resolution. Analysis of images allows us to establish the territory of saline soils, assess the condition of crops and conduct environmental monitoring. The soil layer changes its composition and quality through human activities, which leads to negative consequences. The leading place of atmospheric emissions in the Omsk region belongs to motor vehicles, the number of which is only increasing. Salts of heavy metals (lead and cadmium) settle on soil and plants, accumulating in them over time. At the current state we should talk about local pollution of soils that are located near sources of pollution: various industrial enterprises, thermal power stations and automobile and railway transport.

According to the research results, the coefficients of applied zinc and cobalt fertilizers activity are calculated. It is established that each kilogram of zinc and cobalt applied into the soil layer of 0-30 cm increases the level of mobile zinc by 0.012 and 0.013 mg/kg of soil, mobile form of cobalt by 0.028 and 0.025 mg/kg of soil.

The purpose of the study was to analyze the possibilities of using mathematical models of the water (level) surface of rivers and reservoirs for the transfer of elevations. The use of an empirical mathematical model obtained for the Irtysh River near the city of Omsk makes it possible to determine the heights in the investigated area with an accuracy of about 0.1 m. To determine the level of the water edge at the selected area, it is necessary to obtain: the mark of the water edge at the gauging station; the distance along the river from the gauging station to the work site. It is advisable to fix the water level at the gauging station and the work site simultaneously. For the elevation transfer from one river bank to another by the III class leveling program, the authors propose the technology of laying temporary benchmarks on the banks, fixing the level using special devices, and transferring the elevations of the fixed water level to temporary benchmarks. The technology contains the devices of simple design for accurate level fixing. The factors influencing the accuracy of the height transmission are: fixing the water level, the centrifugal forces of the flow, the Coreolis force caused by the rotation of the Earth, and the wind surge. The authors calculated the expected values of errors determining the accuracy: for fixing the level it was about 1 mm according to the proposed method; the height difference at the banks due to the forces of Coreolis was 0.007 m; the influence of centrifugal forces at a turning radius of 500 m causes a difference in heights at opposite banks of 0.1 m. In the result, the authors proposed the recommendations developed for transferring heights from one river bank to another using a class III leveling program, which ensure the specified accuracy.

This article is an extension of investigation performed by the authors earlier, on the transformation of spatial rectangular coordinates X, Y, Z into geodetic curvilinear ones: latitude B, longitude L, height H. To calculate geodetic latitude B and reduced latitude U by solving a transcendental equation with variable coefficients f(t)=0, where t=tgU, a chord method was applied for the segment [T 1 , T 2 ]; T 1 =tgu 1 ; T-=tgu2. It is mathematically proved that the algorithm constructed on this segment using chord method will be valid only for points on the earth's surface with heights above sea level and with maximum error ΔB=0. 0017". To expand the limits of algorithm and to increase its accuracy, the segment of root location [T 1 , T 2 ] is reduced on the right to the value of [T 1 , T 6 ] where the latitude is determined not only for H>0 but also for H<0. The general formula of chords is transformed to a convenient for calculations form by introducing auxiliary quantities. Its accuracy was estimated and a comparative analysis with the previously obtained algorithm on segment [T 3 , T 2 ] was performed. As a result of a two-sided reduction of interval [T 1 , T 2 ], segment [T3, T6] is obtained where the root of equation will be located only for H>0. It was proved that in order to calculate latitude for points of the earth's surface for |H| ≤ 10 km in non-iterative way using chord method, it was reasonable to use an algorithm constructed on segment [T3, T2], and for near-Earth space points at H>a, calculations should be carried out according to the algorithm constructed on segment [T1, T6].