Keywords:  productivity, plant nutrition, atmospheric precipitation, air temperature, reference indicators of the mathematical model of productivity

Мелиорация.– 2024. – №1 (107). – P 16–26

The requirements that must be observed when modeling crop yields are formulated. They determine the structure of the mathematical model, the conditions for its verification and the duration of a series of long-term observations. It has been established that 3-year data is not enough to build a reliable mathematical model of yield.