USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKE
In Precision Agriculture applications, the knowledge of the N-uptake of crops in a spatial context is a precondition for precise N-fertilization. Therefore, non-destructive methods to determine N concentration or N-uptake of crops are of key interest. In this contribution, we will present an approac...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-12-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://isprs-archives.copernicus.org/articles/XLVIII-1-W2-2023/1867/2023/isprs-archives-XLVIII-1-W2-2023-1867-2023.pdf |
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| author | G. Bareth C. Hütt A. Jenal A. Jenal A. Bolten I. Kleppert H. Firl J. Wolf H. Hüging |
| author_facet | G. Bareth C. Hütt A. Jenal A. Jenal A. Bolten I. Kleppert H. Firl J. Wolf H. Hüging |
| author_sort | G. Bareth |
| collection | DOAJ |
| description | In Precision Agriculture applications, the knowledge of the N-uptake of crops in a spatial context is a precondition for precise N-fertilization. Therefore, non-destructive methods to determine N concentration or N-uptake of crops are of key interest. In this contribution, we will present an approach based on UAV-based crop height analysis to estimate N-uptake. The hypothesis is that biomass can be very well estimated using UAV-derived crop height. It is also known that biomass is highly correlated with N-uptake. Hence, we propose to use UAV-derived crop height as a direct estimator for N-uptake. We will present results from a winter wheat field trial comprising six varieties, three different N amounts, and five repetitions. Multitemporal models have been created from data of the growing season 2020 with a promising performance for biomass (R<sup>2</sup> = 0.91) and N-uptake (R<sup>2</sup> = 0.72). The two linear regression models have been applied to a similar independent data set from the following year, 2021. The results are promising for biomass (R<sup>2</sup> = 0.82) and N-uptake (R<sup>2</sup> = 0.75). Based on our findings, we conclude that UAV-derived crop height - as a structural crop trait - can robustly serve as an estimator for biomass and N-uptake in winter wheat. |
| first_indexed | 2024-03-08T23:21:54Z |
| format | Article |
| id | doaj.art-90ecbb426e224ab08ca07895306ae38b |
| institution | Directory Open Access Journal |
| issn | 1682-1750 2194-9034 |
| language | English |
| last_indexed | 2024-03-08T23:21:54Z |
| publishDate | 2023-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| spelling | doaj.art-90ecbb426e224ab08ca07895306ae38b2023-12-14T23:02:09ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342023-12-01XLVIII-1-W2-20231867187210.5194/isprs-archives-XLVIII-1-W2-2023-1867-2023USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKEG. Bareth0C. Hütt1A. Jenal2A. Jenal3A. Bolten4I. Kleppert5H. Firl6J. Wolf7H. Hüging8GIS & RS Group, Institute of Geography, University of Cologne, GermanyGIS & RS Group, Institute of Geography, University of Cologne, GermanyGIS & RS Group, Institute of Geography, University of Cologne, GermanyAMLS – Application Centre for Machine Learning and Sensor Technologies, University of Applied Sciences Koblenz, Remagen, GermanyGIS & RS Group, Institute of Geography, University of Cologne, GermanyGIS & RS Group, Institute of Geography, University of Cologne, GermanyGIS & RS Group, Institute of Geography, University of Cologne, GermanyGIS & RS Group, Institute of Geography, University of Cologne, GermanyINRES – Crop Sciences, Bonn University, GermanyIn Precision Agriculture applications, the knowledge of the N-uptake of crops in a spatial context is a precondition for precise N-fertilization. Therefore, non-destructive methods to determine N concentration or N-uptake of crops are of key interest. In this contribution, we will present an approach based on UAV-based crop height analysis to estimate N-uptake. The hypothesis is that biomass can be very well estimated using UAV-derived crop height. It is also known that biomass is highly correlated with N-uptake. Hence, we propose to use UAV-derived crop height as a direct estimator for N-uptake. We will present results from a winter wheat field trial comprising six varieties, three different N amounts, and five repetitions. Multitemporal models have been created from data of the growing season 2020 with a promising performance for biomass (R<sup>2</sup> = 0.91) and N-uptake (R<sup>2</sup> = 0.72). The two linear regression models have been applied to a similar independent data set from the following year, 2021. The results are promising for biomass (R<sup>2</sup> = 0.82) and N-uptake (R<sup>2</sup> = 0.75). Based on our findings, we conclude that UAV-derived crop height - as a structural crop trait - can robustly serve as an estimator for biomass and N-uptake in winter wheat.https://isprs-archives.copernicus.org/articles/XLVIII-1-W2-2023/1867/2023/isprs-archives-XLVIII-1-W2-2023-1867-2023.pdf |
| spellingShingle | G. Bareth C. Hütt A. Jenal A. Jenal A. Bolten I. Kleppert H. Firl J. Wolf H. Hüging USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKE The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| title | USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKE |
| title_full | USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKE |
| title_fullStr | USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKE |
| title_full_unstemmed | USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKE |
| title_short | USING UAV-DERIVED PLANT HEIGHT AS AN ESTIMATOR FOR BIOMASS AND N-UPTAKE |
| title_sort | using uav derived plant height as an estimator for biomass and n uptake |
| url | https://isprs-archives.copernicus.org/articles/XLVIII-1-W2-2023/1867/2023/isprs-archives-XLVIII-1-W2-2023-1867-2023.pdf |
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