MATHEMATICAL MODELLING AND OPTIMIZATION OF THE DISTRIBUTION UNIFORMITY FOR THE FIXED RATE COMPOUND FERTILIZER OF 15-15-15 APPLICATION

摘要

The purpose of this study was to obtain the mathematical models and optimize the distribution uniformity in twin-disc granular broadcast spreader. The ultimate goal expected from this study was to optimize the variables considered in the study in order to minimize the coefficient of variation (CV) for the compound fertilizer of 15-15-15. The variables considered in the study were the height of vanes (H), vane angle (a), fertilizer flow rate (Q) and disc peripheral speed (V), as they were related to construction and operating conditions in this fertilizer distribution phenomenon. Response Surface Methodology (RSM) was used in this study. Totally 31 experiments conducted according to ASAE S341.4 standard. According to the results of the verification tests, the twin-disc granular broadcast spreader provided "good" range of distribution uniformity which was 8,135 % for the compound fertilizer of 15-15-15.