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Xin Zhao, Zeyi Zhao, Fengnian Zhao, Jiangfan Liu, Zhaoyang Li, Xingpeng Wang and Yang Gao
Accurate nitrogen fertilizer management determines the yield and quality of fruit trees, but there is a lack of multispectral UAV-based nitrogen fertilizer monitoring technology for orchards. Therefore, in this study, a field experiment was conducted by ...
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John T. Van Stan II and Juan Pinos
Plant canopies divert a portion of precipitation to the base of their stems through ?stemflow?, a phenomenon that influences the canopy water balance, soil microbial ecology, and intrasystem nutrient cycling. However, a comprehensive integration of stemf...
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Sunni Kanta Prasad Kushwaha, Arunima Singh, Kamal Jain, Jozef Vybostok and Martin Mokros
In forestry research, for forest inventories or other applications which require accurate 3D information on the forest structure, a Terrestrial Laser Scanner (TLS) is an efficient tool for vegetation structure estimation. Light Detection and Ranging (LiD...
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Adel M. Al-Saif, Hosny F. Abdel-Aziz, Sobhy M. Khalifa, Ibrahim A. Elnaggar, Abd El-wahed N. Abd El-wahed, Mohammed H. Farouk and Ashraf E. Hamdy
Pruning is an essential practice that helps control branch growth, optimize fruit size, and enhance fruit tree productivity. This study focused on ?Valencia? orange trees, which had experienced a decline in productivity after being cultivated on reclaime...
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Aleksandra Pachuta, Boguslawa Berner, Jerzy Chojnacki, Gerhard Moitzi, Jirí Dvorák, Anna Keutgen, Jan Najser, Jan Kielar, Tomá? Najser and Marcel Mikeska
The study aimed to assess the quality of spraying of ornamental conifer using a multi-rotor drone. We examined how the speed of drone movement and the propellers? spin speed can affect the deposition quality of the sprayed liquid in the crown of blue spr...
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Enrico Maria Lodolini, Alberto de Iudicibus, Pompea Gabriella Lucchese, Giuseppina Las Casas, Biagio Torrisi, Elisabetta Nicolosi, Alessio Giuffrida and Filippo Ferlito
In a young super-high-density (SHD) olive orchard located in Aidone (EN), in the Sicily Region, Italy, the architectural features of five olive cultivars were studied, specifically Arbequina, Arbosana, Oliana®, Giulia®, and FS-17®. Surveys were conducted...
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Yizhuo Zhang, Hantao Liu, Xingyu Liu and Huiling Yu
Due to the complex structure of high-canopy-density forests, the traditional individual tree segmentation (ITS) algorithms based on ALS point cloud, which set segmentation threshold manually, is difficult to adequately cover a variety of complex situatio...
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Peng Qi, Lanting Zhang, Zhichong Wang, Hu Han, Joachim Müller, Tian Li, Changling Wang, Zhan Huang, Miao He, Yajia Liu and Xiongkui He
Background: Unmanned Aerial Vehicles (UAVs) are increasingly being used commercially for crop protection in East Asia as a new type of equipment for pesticide applications, which is receiving more and more attention worldwide. A new model of pear cultiva...
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Chenchen Gu, Chunjiang Zhao, Wei Zou, Shuo Yang, Hanjie Dou and Changyuan Zhai
Orchard spraying can effectively control pests and diseases. Over-spraying commonly results in excessive pesticide residues on agricultural products and environmental pollution. To avoid these problems, variable spraying technology uses target canopy det...
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Zhongao Lu, Lijun Qi, Hao Zhang, Junjie Wan and Jiarui Zhou
Obtaining canopy area, crown width, position, and other information from UAV aerial images and adjusting spray parameters in real-time according to this information is an important way to achieve precise pesticide application in orchards. However, the na...
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