Development of a method to control threshing process based on properties of harvested crop variety and external factors

The purpose of research is to determine how force of grain binding with the ear of winter wheat depend on properties of grain, its stage of ripeness and weather conditions. Objects of research is to consider dependences and regularities of changes in force of grain binding with an ear of winter wheat due to its temperature and humidity, duration of plant growing (standing) upon reaching full ripeness, ambient temperature and to assess the possibility of their use to control threshing process. Field experiments were carried out to determine force of grain binding with the ear of winter wheat of variety "Admiral", its temperature and humidity, ambient temperature, duration of plant growing (standing) after reaching full ripeness over the recommended agro-harvesting period. On the example of graphic dependence of parameters under discussion for the studied variety on duration of plant growing (standing) over the period of experiments we revealed the tendency of their change. Type and closeness of binding were assessed according to correlation and regression analysis. It is established that the correlation between force of grain binding with the ear of winter wheat and independent variables is linear. The analysis of regression equation parameters: overall coefficients of correlation, determination, values of the Fisher criterion, significance level, as well as the Durbin-Watson criterion ensured that the chosen model is adequate and can be applied in practice to control threshing process.