Evaluation of a commercial grape yield monitor for use mid-season and at-harvest
Aims: Yield monitors are becoming more common in North America. This research evaluates the precision and accuracy of a retro-fitted, commercially available grape yield monitor mid-season, for crop estimation and crop thinning applications, and at harvest for yield mapping. Methods and Results: Seve...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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International Viticulture and Enology Society
2016-07-01
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| Series: | OENO One |
| Subjects: | |
| Online Access: | https://oeno-one.eu/article/view/784 |
| _version_ | 1818967480173854720 |
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| author | James A. Taylor Luis Sánchez Brent Sams Luke Haggerty Rhiann Jakubowski Sarah Djafour Terence R. Bates |
| author_facet | James A. Taylor Luis Sánchez Brent Sams Luke Haggerty Rhiann Jakubowski Sarah Djafour Terence R. Bates |
| author_sort | James A. Taylor |
| collection | DOAJ |
| description | Aims: Yield monitors are becoming more common in North America. This research evaluates the precision and accuracy of a retro-fitted, commercially available grape yield monitor mid-season, for crop estimation and crop thinning applications, and at harvest for yield mapping.
Methods and Results: Several grape yield monitors were mounted on the discharge conveyor belt of grape harvesters in both commercial and research vineyards in North America. Sensor response was compared to manual measurements at multiple masses, ranging from 20 kg to 28 Mg over the course of three seasons. Measurements were taken during crop thinning and estimation (mid-season) and at harvest. Results showed that the grape yield monitor performance was sufficient to generate good spatial maps of the relative variation in harvest yield and mid-season thinned yield. However, at harvest the sensor showed a shift in response between days of up to ±15%, such that the generation of absolute yield maps required a daily calibration against a known mass. Within a day (single harvest operation) the sensor response did not appear to drift. Mid-season applications required a different calibration to harvest applications.
Conclusion: The yield sensor worked well for both mid-season and at harvest operations in North American vineyards but required a daily calibration to avoid drift issues. The mid-season yield calibrations were different between seasons; however, the harvest calibration factor was stable between seasons.
Significance and Impact of study: The study showed that a commercial yield monitor with correct calibration was effective at even low fruit flow. This opens the possibility of using a harvest sensor mid-season to mechanically estimate fruit load from small point samples and to map the amount of fruit removed during fruit thinning operations. This will improve the quality of information available to viticulturist to understand fruit and crop load. The commercial yield monitor is suitable for use in North American vineyards. |
| first_indexed | 2024-12-20T13:49:28Z |
| format | Article |
| id | doaj.art-d15d59f9e5374261b1762e5b8b4b105b |
| institution | Directory Open Access Journal |
| issn | 2494-1271 |
| language | English |
| last_indexed | 2024-12-20T13:49:28Z |
| publishDate | 2016-07-01 |
| publisher | International Viticulture and Enology Society |
| record_format | Article |
| series | OENO One |
| spelling | doaj.art-d15d59f9e5374261b1762e5b8b4b105b2022-12-21T19:38:34ZengInternational Viticulture and Enology SocietyOENO One2494-12712016-07-0150210.20870/oeno-one.2016.50.2.784784Evaluation of a commercial grape yield monitor for use mid-season and at-harvestJames A. Taylor0Luis Sánchez1Brent Sams2Luke Haggerty3Rhiann Jakubowski4Sarah Djafour5Terence R. Bates6Cornell Lake Erie Research and Extension Laboratory, School of Integrative Plant Science, Cornell University, 6592 West Main St, Portland, NY, 14769, United States; School of Agriculture, Food and Rural Development, The University of Newcastle upon Tyne, Cockle Park Farm, Morpeth, NE61 3EB, United KingdomE&J Gallo Winery, PO Box 1130, Modesto, CA, United StatesE&J Gallo Winery, PO Box 1130, Modesto, CA, United StatesCornell Cooperative Extension, Cornell Lake Erie Research and Extension Laboratory, 6592 West Main St, Portland, NY, 14769, United StatesCornell Cooperative Extension, Cornell Lake Erie Research and Extension Laboratory, 6592 West Main St, Portland, NY, 14769, United StatesCornell Lake Erie Research and Extension Laboratory, School of Integrative Plant Science, Cornell University, 6592 West Main St, Portland, NY, 14769, United StatesCornell Lake Erie Research and Extension Laboratory, School of Integrative Plant Science, Cornell University, 6592 West Main St, Portland, NY, 14769, United StatesAims: Yield monitors are becoming more common in North America. This research evaluates the precision and accuracy of a retro-fitted, commercially available grape yield monitor mid-season, for crop estimation and crop thinning applications, and at harvest for yield mapping. Methods and Results: Several grape yield monitors were mounted on the discharge conveyor belt of grape harvesters in both commercial and research vineyards in North America. Sensor response was compared to manual measurements at multiple masses, ranging from 20 kg to 28 Mg over the course of three seasons. Measurements were taken during crop thinning and estimation (mid-season) and at harvest. Results showed that the grape yield monitor performance was sufficient to generate good spatial maps of the relative variation in harvest yield and mid-season thinned yield. However, at harvest the sensor showed a shift in response between days of up to ±15%, such that the generation of absolute yield maps required a daily calibration against a known mass. Within a day (single harvest operation) the sensor response did not appear to drift. Mid-season applications required a different calibration to harvest applications. Conclusion: The yield sensor worked well for both mid-season and at harvest operations in North American vineyards but required a daily calibration to avoid drift issues. The mid-season yield calibrations were different between seasons; however, the harvest calibration factor was stable between seasons. Significance and Impact of study: The study showed that a commercial yield monitor with correct calibration was effective at even low fruit flow. This opens the possibility of using a harvest sensor mid-season to mechanically estimate fruit load from small point samples and to map the amount of fruit removed during fruit thinning operations. This will improve the quality of information available to viticulturist to understand fruit and crop load. The commercial yield monitor is suitable for use in North American vineyards.https://oeno-one.eu/article/view/784on-the-go proximal sensingyield mappingcrop estimation |
| spellingShingle | James A. Taylor Luis Sánchez Brent Sams Luke Haggerty Rhiann Jakubowski Sarah Djafour Terence R. Bates Evaluation of a commercial grape yield monitor for use mid-season and at-harvest OENO One on-the-go proximal sensing yield mapping crop estimation |
| title | Evaluation of a commercial grape yield monitor for use mid-season and at-harvest |
| title_full | Evaluation of a commercial grape yield monitor for use mid-season and at-harvest |
| title_fullStr | Evaluation of a commercial grape yield monitor for use mid-season and at-harvest |
| title_full_unstemmed | Evaluation of a commercial grape yield monitor for use mid-season and at-harvest |
| title_short | Evaluation of a commercial grape yield monitor for use mid-season and at-harvest |
| title_sort | evaluation of a commercial grape yield monitor for use mid season and at harvest |
| topic | on-the-go proximal sensing yield mapping crop estimation |
| url | https://oeno-one.eu/article/view/784 |
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