{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T01:36:00Z","timestamp":1773797760577,"version":"3.50.1"},"reference-count":68,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2022,11,17]],"date-time":"2022-11-17T00:00:00Z","timestamp":1668643200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100019285","name":"Bio-based Industries Joint Undertaking","doi-asserted-by":"publisher","award":["745012"],"award-info":[{"award-number":["745012"]}],"id":[{"id":"10.13039\/501100019285","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Unmanned aerial vehicle (UAV) remote sensing was used to estimate the leaf area index (LAI) and leaf chlorophyll content (LCC) of two hemp cultivars during two growing seasons under four nitrogen fertilisation levels. The hemp traits were estimated by the inversion of the PROSAIL model from UAV multispectral images. The look-up table (LUT) and hybrid regression inversion methods were compared. The hybrid methods performed better than LUT methods, both for LAI and LCC, and the best accuracies were achieved by random forest for the LAI (0.75 m2 m\u22122 of RMSE) and by Gaussian process regression for the LCC (9.69 \u00b5g cm\u22122 of RMSE). High-throughput phenotyping was carried out by applying a generalised additive model to the time series of traits estimated by the PROSAIL model. Through this approach, significant differences in LAI and LCC dynamics were observed between the two hemp cultivars and between different levels of nitrogen fertilisation.<\/jats:p>","DOI":"10.3390\/rs14225801","type":"journal-article","created":{"date-parts":[[2022,11,17]],"date-time":"2022-11-17T03:27:44Z","timestamp":1668655664000},"page":"5801","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["Comparison of PROSAIL Model Inversion Methods for Estimating Leaf Chlorophyll Content and LAI Using UAV Imagery for Hemp Phenotyping"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9878-6595","authenticated-orcid":false,"given":"Giorgio","family":"Impollonia","sequence":"first","affiliation":[{"name":"Department of Sustainable Crop Production, Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"},{"name":"Remote Sensing and Spatial Analysis Research Center (CRAST), Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7356-2774","authenticated-orcid":false,"given":"Michele","family":"Croci","sequence":"additional","affiliation":[{"name":"Department of Sustainable Crop Production, Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"},{"name":"Remote Sensing and Spatial Analysis Research Center (CRAST), Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"}]},{"given":"Henri","family":"Blandini\u00e8res","sequence":"additional","affiliation":[{"name":"Department of Sustainable Crop Production, Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"}]},{"given":"Andrea","family":"Marcone","sequence":"additional","affiliation":[{"name":"Department of Sustainable Crop Production, Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"},{"name":"Remote Sensing and Spatial Analysis Research Center (CRAST), Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"}]},{"given":"Stefano","family":"Amaducci","sequence":"additional","affiliation":[{"name":"Department of Sustainable Crop Production, Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"},{"name":"Remote Sensing and Spatial Analysis Research Center (CRAST), Universit\u00e0 Cattolica del Sacro Cuore, 29122 Piacenza, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.indcrop.2014.06.041","article-title":"Key cultivation techniques for hemp in Europe and China","volume":"68","author":"Amaducci","year":"2015","journal-title":"Ind. 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