Аннотация:The article deals with the development of a methodology for predicting total water consumption based on the theory of Chebyshev interpolation of a discretely given function, which allows obtaining more accurate predicted values and, as a result, optimizing irrigation parameters.The developed computer program, which implements the construction of a predictive polynomial, allows it to be integrated into the structure of digital platforms for agribusiness management, such as, for example, Agrosignal, and used for prompt adjustment of irrigation decisions.