METHODS FOR DETERMINING THE RADIATION BALANCE OF SOIL AND VEGETATION COVER OF AGRICULTURAL LANDS

In this article, an analysis of calculation methods for determining the radiation balance and photosynthetically active radiation of soil and vegetation cover of agricultural land is conducted. The lack of continuous actinometric observations of solar radiation and radiation balance at meteorological stations in the Eurasian region leads to the widespread use of empirical and semi-empirical models based on climatic and geographical indicators. Mathematical models based on climatic indicators, which vary in spatial and temporal aspects and are formed on the basis of the principle of natural analogies, provide reliable and accurate data. However, calculation methods that use geographical indicators do not have physical and mathematical meaning, resulting in significant errors in the data. The aim of the research is to analyze indirect methods to identify their physical and mathematical justification. The need for the development of quantitative methods for assessing the effective use of photosynthetically active radiation to improve forecasting and management of agricultural land is emphasized.