Testing of site-specific yield in different harvest passes
Abstract
This paper analyzes the differences in mass yield of moist rapeseed grain for six different passes of combine harvester along the plot. The Mann-Whitney U test and Z-statistic are used for analysis needs. For harvest pass 1 and pass 4 the Z-value is only 0,211, whereas the statistical significance level to confirm this finding is 0,8333, therefore there is not statistically significant difference between yield levels in mentioned passes. It is established that there are another three pairs of similar harvest passes, of which two are adjacent, while all other passes exhibit statistical difference with respect to the yield. The approximate value of the effect size r indicator is applied for all passes, where a statistically significant difference turned out to exist between them. The highest difference is noted between pass 2 and pass 3, the effect size r value amounting to 0,464, which can be considered a large effect size according to Cohen's criterion. This paper suggests extending th...e current routine implementation of yield analysis to an automated post-processing system.
Keywords:
rapeseed / pass / median / Mann-Whitney U testSource:
Tehnički vjesnik, 2016, 23, 2, 499-503Publisher:
- Univ Osijek, Tech Fac, Slavonski Brod
DOI: 10.17559/TV-20140930145702
ISSN: 1330-3651
WoS: 000380230400022
Scopus: 2-s2.0-84965064089
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Mašinski fakultetTY - JOUR AU - Simonović, Vojislav AU - Marković, Dragan AU - Marković, Ivana PY - 2016 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2338 AB - This paper analyzes the differences in mass yield of moist rapeseed grain for six different passes of combine harvester along the plot. The Mann-Whitney U test and Z-statistic are used for analysis needs. For harvest pass 1 and pass 4 the Z-value is only 0,211, whereas the statistical significance level to confirm this finding is 0,8333, therefore there is not statistically significant difference between yield levels in mentioned passes. It is established that there are another three pairs of similar harvest passes, of which two are adjacent, while all other passes exhibit statistical difference with respect to the yield. The approximate value of the effect size r indicator is applied for all passes, where a statistically significant difference turned out to exist between them. The highest difference is noted between pass 2 and pass 3, the effect size r value amounting to 0,464, which can be considered a large effect size according to Cohen's criterion. This paper suggests extending the current routine implementation of yield analysis to an automated post-processing system. PB - Univ Osijek, Tech Fac, Slavonski Brod T2 - Tehnički vjesnik T1 - Testing of site-specific yield in different harvest passes EP - 503 IS - 2 SP - 499 VL - 23 DO - 10.17559/TV-20140930145702 ER -
@article{ author = "Simonović, Vojislav and Marković, Dragan and Marković, Ivana", year = "2016", abstract = "This paper analyzes the differences in mass yield of moist rapeseed grain for six different passes of combine harvester along the plot. The Mann-Whitney U test and Z-statistic are used for analysis needs. For harvest pass 1 and pass 4 the Z-value is only 0,211, whereas the statistical significance level to confirm this finding is 0,8333, therefore there is not statistically significant difference between yield levels in mentioned passes. It is established that there are another three pairs of similar harvest passes, of which two are adjacent, while all other passes exhibit statistical difference with respect to the yield. The approximate value of the effect size r indicator is applied for all passes, where a statistically significant difference turned out to exist between them. The highest difference is noted between pass 2 and pass 3, the effect size r value amounting to 0,464, which can be considered a large effect size according to Cohen's criterion. This paper suggests extending the current routine implementation of yield analysis to an automated post-processing system.", publisher = "Univ Osijek, Tech Fac, Slavonski Brod", journal = "Tehnički vjesnik", title = "Testing of site-specific yield in different harvest passes", pages = "503-499", number = "2", volume = "23", doi = "10.17559/TV-20140930145702" }
Simonović, V., Marković, D.,& Marković, I.. (2016). Testing of site-specific yield in different harvest passes. in Tehnički vjesnik Univ Osijek, Tech Fac, Slavonski Brod., 23(2), 499-503. https://doi.org/10.17559/TV-20140930145702
Simonović V, Marković D, Marković I. Testing of site-specific yield in different harvest passes. in Tehnički vjesnik. 2016;23(2):499-503. doi:10.17559/TV-20140930145702 .
Simonović, Vojislav, Marković, Dragan, Marković, Ivana, "Testing of site-specific yield in different harvest passes" in Tehnički vjesnik, 23, no. 2 (2016):499-503, https://doi.org/10.17559/TV-20140930145702 . .