RELATION RESEARCH OF SITE-SPECIFIC TRITICALE YIELD AND COMBINE SPEED

Abstract

The paper analyzes the impact of sensor readings of dry grain mass yield of triticale on combine speed during harvesting. On the basis of mean values for group ranks and using Kruskal-Wallis H test, the highest combine speed on triticale plot has been found in the low-yield-level group. There fore, subsequent analysis of differences was conducted between the groups using Mann Whitney U test. In the case of comparing recorded in groups of small and middle-yield triticale in the analyzed plot effect size value is 0.13. It would be considered a very small impact according to Cohen's criteria. In the case of comparing recorded in groups with middle and high yield effect size is just over that 0.286, and it is considered a medium influence on Cohen's criteria. When comparing the speed of a group of small and large, Z statistic is equal to -26.110 to 4931 treated cases, the effect size is 0.37 and still be considered a medium influence.