Design and test of reel speed control system for soybean combine harvester in the strip intercropping mode.

22 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{gathered} R = 2.3 + 0.105A + 0.0925B + 0.3575C + 0.05AB + 0.06AC \\ + 0.065BC + 0.1842A^{2} + 0.3192B^{2} - 0.2558C^{2} \\ \end{gathered}$$\end{document} It can be concluded from the results of variance analysis Table 9 that the P value of the regression model is less than 0.01, indicating that the model is extremely significant; the lack of fit item is not significant, and the coefficient of determination R 2 = 0.9752, indicating that the model has a good fitting degree.

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