Results 11 to 20 of about 25,590 (247)

Monitoring the Foliar Nutrients Status of Mango Using Spectroscopy-Based Spectral Indices and PLSR-Combined Machine Learning Models

Remote Sensing, 2021
Conventional methods of plant nutrient estimation for nutrient management need a huge number of leaf or tissue samples and extensive chemical analysis, which is time-consuming and expensive.
G. Mahajan, Bappa Das, Dayesh Murgaokar, I. Herrmann, K. Berger, R. Sahoo, K. Patel, Ashwini Desai, Shaiesh Morajkar, R. Kulkarni   +9 more
semanticscholar   +1 more source

Investigation of a Medical Plant for Hepatic Diseases with Secoiridoids Using HPLC and FT-IR Spectroscopy for a Case of Gentiana rigescens

Molecules, 2020
Secoiridoids could be used as a potential new drug for the treatment of hepatic disease. The content of secoiridoids of G. rigescens varied in different geographical origins and parts.
Yuangui Yang, Yanli Zhao, Zhitian Zuo, Ji Zhang, Yao Shi, Yuanzhong Wang   +5 more
doaj   +1 more source

Pendugaan Kadar Patchouli Alkohol Pada Minyak Nilam Variasi Menggunakan Teknologi Near Infrared Reflectance Spectroscopy Dengan Metode Partial Least Square Regression

Rona Teknik Pertanian, 2023
Abstrak.  Minyak nilam merupakah salah satu minyak atsiri yang menyumbangkan devisa bagi negara. Komponen utama dalam minyak adalah Patchouli Alkohol (PA). Salah satu parameter yang menentukan kualitas minyak nilam adalah kadar PA.
Risqa Mutha Dina, Farah Cikita Safliany, Al Thahyat Nur, Hagi Al-Annari, Dwipa Aby Ananta, Zulfahrizal Zulfahrizal   +5 more
doaj   +1 more source

Inversion of Mangrove Canopy Leaf Functional Traits on the Qi'ao Island Based on UAV Hyperspectral Remote Sensing

Redai dili, 2023
Quantitative studies of mangrove leaf functional traits will help us understand the adaptive evolutionary strategies of mangrove plants and the relationship between mangrove biodiversity and ecosystem functions.
Wang Meng, Sun Zhengzheng, He Zhidong, Wang Zhihui, Geng Shoubao, Zhao Xinfeng, Yang Long, Sun Zhongyu   +7 more
doaj   +1 more source

Evaluating and Predicting the Effects of Land Use Changes on Hydrology in Wami River Basin, Tanzania

Hydrology, 2020
Understanding the variation in the hydrological response of a basin associated with land use changes is essential for developing management strategies for water resources.
Sekela Twisa, Shija Kazumba, Mathew Kurian, Manfred F. Buchroithner   +3 more
doaj   +1 more source

Hyperspectral Estimation of Soil Organic Matter Content using Different Spectral Preprocessing Techniques and PLSR Method

Remote Sensing, 2020
Soil organic matter (SOM) is the main source of soil nutrients, which are essential for the growth and development of agricultural crops. Hyperspectral remote sensing is one of the most efficient ways of estimating the SOM content. Visible, near infrared,
Lanzhi Shen, Maofang Gao, Jingwen Yan, Zhaoliang Li, P. Leng, Qiang Yang, Sibo Duan   +6 more
semanticscholar   +1 more source

Three-Phase-Based Approach to Develop a River Health Prediction and Early Warning System to Guide River Management

Applied Sciences, 2019
To effectively manage a river system, systematic tracking and diagnosing the change and risks of a river system are essentially required to efficiently conserve or restore its conditions.
Yongming Chen, Jihong Xia, Wangwei Cai, Zhilin Sun, Chuanbing Dou   +4 more
doaj   +1 more source

Near Infrared Reflectance Spectroscopy and Multivariate Analyses for Fast and Non-Destructive Prediction of Corn Seed Germination

Turkish Journal of Agriculture: Food Science and Technology, 2020
The application of near-infrared reflectance spectroscopy (NIRS) and multivariate analysis for determining the seed germination rate of corn genotypes was assessed.
Nafiz Çeliktaş, Ömer Konuşkan
doaj   +1 more source

The Degrees of Freedom of Partial Least Squares Regression [PDF]

, 2010
The derivation of statistical properties for Partial Least Squares regression can be a challenging task. The reason is that the construction of latent components from the predictor variables also depends on the response variable.
Akaike H., Brown P., Krämer N., Lanczos C., Leisch F., Masashi Sugiyama, Nicole Krämer   +6 more
core   +6 more sources

Using Field Spectroradiometer to Estimate the Leaf N/P Ratio of Mixed Forest in a Karst Area of Southern China: A Combined Model to Overcome Overfitting

Remote Sensing, 2021
The ratio between nitrogen and phosphorus (N/P) in plant leaves has been widely used to assess the availability of nutrients. However, it is challenging to rapidly and accurately estimate the leaf N/P ratio, especially for mixed forest. In this study, we
Wen He, Yanqiong Li, Jinye Wang, Yuefeng Yao, Ling Yu, Daxing Gu, Longkang Ni   +6 more
doaj   +1 more source