Izvestiya of Saratov University.
ISSN 1819-7663 (Print)
ISSN 2542-1921 (Online)


correlation

Changes in the main climatic and agro-climatic indicators in the territory of the Republic of Tatarstan in the period 1966–2025

The purpose of this article is to assess changes in key climatic parameters under conditions of current global warming in the Republic of Tatarstan (RT) for the period 1966–2025, for the benefit of the agricultural sector. Statistical processing of 60 years of observation data from 14 meteorological stations revealed a number of patterns in the distribution of key climatic characteristics, enabling an assessment of current climate change trends in the region.

Correlation Transformation of Field Vibragram with the Account of Distorces of Phase Spectrum of Swip-signals

The original method of correlative transformation of vibrograms, which takes into account the distortion of reference signals in environment with frequency-dependent attenuation on the energy of elastic vibrations. The experimental material shows that the proposed method of calculating correlograms allows to significantly improve the quality of vibroseis materials. The possibility of calculating the attenuation decrement, which carries a significant amount of additional information on the structure and properties of the geological section, is also discussed.

Zoning of the Saratov Region According to Formation of Protein in Spring Wheat

The article presents forecasts of the quality of spring wheat grain according to the method of V. Ya. Yaroshevsky and V. P.