Results 21 to 30 of about 1,983 (164)

Assessing the Effect of Real Spatial Resolution of In Situ UAV Multispectral Images on Seedling Rapeseed Growth Monitoring

Remote Sensing, 2020
The spatial resolution of in situ unmanned aerial vehicle (UAV) multispectral images has a crucial effect on crop growth monitoring and image acquisition efficiency.
Jian Zhang, Chufeng Wang, Chenghai Yang, Tianjin Xie, Zhao Jiang, Tao Hu, Zhibang Luo, Guangsheng Zhou, Jing Xie   +8 more
doaj   +1 more source

Firma espectral de peca de la hoja (Mycosphaerella fragariae (Tul.)) en plantas de fresa (Fragaria x ananassa Duch) relacionada a índices NDVI y NDRE [PDF]

, 2023
Introduction: The strawberry crop is seriously affected by different diseases that result in a decrease in production and fruit quality. Among the most important diseases that attack the strawberry crop is Mycosphaerella fragariae, the causal agent of ...
Castellanos González, Leónides, Fajardo Rojas, Alexandra Estefania, Peláez Carrillo, Diego Alfonso   +2 more
core   +1 more source

Reflectance Measurements from Aerial and Proximal Sensors Provide Similar Precision in Predicting the Rice Yield Response to Mid-Season N Applications

Sensors, 2023
Accurately detecting nitrogen (N) deficiency and determining the need for additional N fertilizer is a key challenge to achieving precise N management in many crops, including rice (Oryza sativa L.).
Telha H. Rehman, Mark E. Lundy, Andre Froes de Borja Reis, Nadeem Akbar, Bruce A. Linquist   +4 more
doaj   +1 more source

Model for detecting nitrogen deficiency in wheat crop using spectral indices

Journal of Agrometeorology, 2014
An experiment was conducted four years (2007-08 to 20010-11) during rabi at Anand, India to study nitrogen stress response of wheat (Triticum aestivum L.) on spectral signature using spectroradiometer (Model - UniSpec DC Dual Channel Spectrometer, PP ...
B. I. KARANDE, M. M. LUNAGARIA, K. I. PATEL, VYAS PANDEY   +3 more
doaj   +1 more source

Ứng dụng công nghệ UAV (drones) theo dõi sinh trưởng và dự báo năng suất lúa tại vùng canh tác lúa tỉnh Hậu Giang

Tạp chí Khoa học Đại học Cần Thơ, 2023
Nghiên cứu ảnh hưởng của độ cứng đất và chỉ số khác biệt thực vật chuẩn hóa (NDVI) và chỉ số khác biệt rìa đỏ (NDRE) đến khả năng sinh trưởng và năng suất thực tế (NSTT) của lúa thật sự cần thiết. Trong nghiên cứu này, kiểm định hệ số tương quan Pearson
Bùi Văn Hữu, Lưu Trọng Hiếu, Ngô Quang Hiếu   +2 more
doaj   +1 more source

Non-invasive Estimation of Foliar Nitrogen Concentration Using Spectral Characteristics of Menthol Mint (Mentha arvensis L.)

Frontiers in Plant Science, 2022
Menthol mint (Mentha arvensis L., Family: Lamiaceae), popularly known as corn mint or Japanese mint, is an important industrial crop that is widely grown for its valued essential oil.
Praveen Pandey, Swati Singh, Mohammad Saleem Khan, Mohammad Saleem Khan, Manoj Semwal, Manoj Semwal   +5 more
doaj   +1 more source

Spectral Reflectance Indices as a High Throughput Selection Tool in a Sesame Breeding Scheme

Remote Sensing, 2022
On-farm genotype screening is at the core of every breeding scheme, but it comes with a high cost and often high degree of uncertainty. Phenomics is a new approach by plant breeders, who use optical sensors for accurate germplasm phenotyping, selection ...
Christos Petsoulas, Eleftherios Evangelou, Alexandros Tsitouras, Vassilis Aschonitis, Anastasia Kargiotidou, Ebrahim Khah, Ourania I. Pavli, Dimitrios N. Vlachostergios   +7 more
doaj   +1 more source

COMPARAÇÃO DE TRÊS DIFERENTES SENSORES ESPECTRAIS NA PRODUÇÃO DE NDVI E NDRE PARA AGRICULTURA DE PRECISÃO [PDF]

This study aimed to compare the NDVI and NDRE spectral indices, taking into account the specific characteristics of each sensor. The research was conducted in an experimental agricultural area at the CECA/UFAL Campus, located in Rio Largo, AL.
Quintela, luiz, Barbosa, Wedja, Cunha , Ascanio, Mirelly, Laysa, Costa Falcão Tavares, Arthur   +4 more
core   +1 more source

Multi-Temporal Assessment of Remotely Sensed Autumn Grass Senescence across Climatic and Topographic Gradients

Land, 2023
Climate and topography are influential variables in the autumn senescence of grassland ecosystems. For instance, extreme weather can lead to earlier or later senescence than normal, while higher altitudes often favor early grass senescence.
Lwando Royimani, Onisimo Mutanga, John Odindi, Rob Slotow   +3 more
doaj   +1 more source

Spatiotemporal stability estimation of physicochemical parameters of rice based on dynamic process orientation and refined abundance modification

Geo-spatial Information Science
Accurate assessment of the physicochemical parameters of rice is critical for increasing agricultural production and ensuring food security. The leaf area index (LAI), leaf chlorophyll content (expressed as the soil plant analysis development (SPAD ...
Shanjun Luo, Qian Li, Wu Zhaocong
doaj   +1 more source