The invention relates to the method for determination of the term of harvesting for crop plants including utilization of calculation of "the falling number", by determination of the local prognosis of "the falling number" in real time for each crop plant with the aid of computational procedure containing the data of the culture sowing, place of sowing and local weather information entered as the input data. Comparative data, measured at the reference farms for calibration of computational parameters, are used as the input data according to the invention. Decision on harvesting can be taken by way of comparison of prognosis got for different cultures between them, and with specified value.
