Results 11 to 20 of about 4,811,303 (245)

Assessing rice blast disease severity through hyperspectral remote sensing

Journal of Agrometeorology, 2022
Remote sensing is being increasingly used in stress management in different agricultural practices. It is useful for real time analysis for crop stress which is not possible for visual observation alone. Rice blast caused by fungus Pyricularia Oryzae is
NANDITA MANDAL, DEB K. DAS, RABI N. SAHOO, SUJAN ADAK, A. KUMAR, C. VISWANATHAN, J. MUKHERJEE , H. RAJASHEKARA, RAJEEV RANJAN, B. DAS   +9 more
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High-Throughput Field Phenotyping Traits of Grain Yield Formation and Nitrogen Use Efficiency: Optimizing the Selection of Vegetation Indices and Growth Stages

Frontiers in Plant Science, 2020
High-throughput, non-invasive phenotyping is promising for evaluating crop nitrogen (N) use efficiency (NUE) and grain yield (GY) formation under field conditions, but its application for genotypes differing in morphology and phenology is still rarely ...
Lukas Prey, Yuncai Hu, Urs Schmidhalter
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A Random Forest Algorithm for Retrieving Canopy Chlorophyll Content of Wheat and Soybean Trained with PROSAIL Simulations Using Adjusted Average Leaf Angle

Remote Sensing, 2021
Canopy chlorophyll content (CCC) is an important indicator for crop-growth monitoring and crop productivity estimation. The hybrid method, involving the PROSAIL radiative transfer model and machine learning algorithms, has been widely applied for crop ...
Quanjun Jiao, Qi Sun, Bing Zhang, Wenjiang Huang, Huichun Ye, Zhaoming Zhang, Xiao Zhang, Binxiang Qian   +7 more
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The Peak Absorbance Wavelength of Photosynthetic Pigments Around Other Stars From Spectral Optimization

Frontiers in Astronomy and Space Sciences, 2021
In the search for life on other planets, the presence of photosynthetic surface vegetation may be detectable from the colors of light it reflects. On the modern Earth, this spectral reflectance is characterized by a steep increase in reflectance between ...
Owen R. Lehmer, Owen R. Lehmer, David C. Catling, Mary N. Parenteau, Nancy Y. Kiang, Tori M. Hoehler   +5 more
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Determination of optimal narrow bands for vegetation indices to discriminate nitrogen status in wheat crop

Journal of Agrometeorology, 2015
Nitrogen stress sensors are based on reflectance measurement controlled by the chlorophyll content. Reflectance of canopy is spectral dependent and more sensitive narrow spectral band can be exploited for reflectance measurement sensors.The experiments ...
M. M. LUNAGARIA, B. I. KARANDE, K. I. PATEL, VYAS PANDEY   +3 more
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Species-Level Classification and Mapping of a Mangrove Forest Using Random Forest—Utilisation of AVIRIS-NG and Sentinel Data

Remote Sensing, 2021
Although studies on species-level classification and mapping using multisource data and machine learning approaches are plenty, the use of data with ideal placement of central wavelength and bandwidth at appropriate spatial resolution, for the ...
Mukunda Dev Behera, Surbhi Barnwal, Somnath Paramanik, Pulakesh Das, Bimal Kumar Bhattyacharya, Buddolla Jagadish, Parth S. Roy, Sujit Madhab Ghosh, Soumit Kumar Behera   +8 more
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EFFECTS OF GF-6 SATELLITE RED-EDGE BANDS ON PEANUT DROUGHT MONITORING [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Red-edge band is an indicator band to describe the health status of crops. In order to explore the impact of the red-edge bands on the accuracy of agricultural drought monitoring, this study used GF-6 WFV and Landsat8 to calculate the Red-edge Normalized
Y. Zhang, P. Li, T. Liu, J. He, L. Wang, Y. Guo, H. Zhang, X. Yang   +7 more
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Narrow band based and broadband derived vegetation indices using Sentinel-2 Imagery to estimate vegetation biomass [PDF]

Global Journal of Environmental Science and Management, 2020
Forest’s ecosystem is one of the most important carbon sink of the terrestrial ecosystem. Remote sensing technology provides robust techniques to estimate biomass and solve challenges in forest resource assessment.
A.B. Imran, K. Khan, N. Ali, N. Ahmad, A. Ali, K. Shah   +5 more
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Study on red edge characteristics of rice spectral caused by nitrogen level

浙江大学学报. 农业与生命科学版, 2001
The canopy spectra of rice under different nitrogen levels were studied. Some red edge parameters in the first derivative reflectance curve (wavelength, amplitude and area of the red edge peak) were studied to evaluate rice leaf chlorophyll, LAI etc. Red
WANG Xiu-zheng, WANG Ren-chao, LI Yun-mei, SHEN Zhang-quan   +3 more
doaj   +1 more source

Evaluation of the health status of Araucaria araucana trees using hyperspectral images

Revista de Teledetección, 2018
The Araucaria araucana is an endemic species from Chile and Argentina, which has a high biological, scientific and cultural value and since 2016 has shown a severe affection of leaf damage in some individuals, causing in some cases their death.
N. Medina, P. Vidal, R. Cifuentes, J. Torralba, F. Keusch   +4 more
doaj   +1 more source