scholarly journals Development of Spectral Reflectance Measurement Device and Its Application to Evaluation of Water Stress of Tree

2013 ◽  
Vol 51 (6) ◽  
pp. 358-369
Author(s):  
Ryuji HYODO
Keyword(s):  
Water Stress ◽  
Spectral Reflectance ◽  
Measurement Device ◽  
Reflectance Measurement

scholarly journals Determination of water stress with spectral reflectance on sweet corn (Zea mays L.) using classification tree (CT) analysis

2013 ◽  
Vol 100 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Levent Genc ◽  
Melis Inalpulat ◽  
Unal Kizil ◽  
Mustafa Mirik ◽  
Scot E. Smith ◽  
...  
Keyword(s):  
Zea Mays ◽  
Water Stress ◽  
Spectral Reflectance ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Classification Tree ◽  
Ct Analysis

scholarly journals Using Hyperspectral and Multispectral Indices to Detect Water Stress for an Urban Turfgrass System

Agronomy ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 439 ◽  
Author(s):  
Badzmierowski ◽  
McCall ◽  
Evanylo
Keyword(s):  
Water Stress ◽  
Spectral Reflectance ◽  
Festuca Arundinacea ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
High Water ◽  
Management Tool ◽  
N Accumulation ◽  
Spatial Coverage ◽  
Reflectance Data

Spectral reflectance measurements collected from hyperspectral and multispectral radiometers have the potential to be a management tool for detecting water and nutrient stress in turfgrass. Hyperspectral radiometers collect hundreds of narrowband reflectance data compared to multispectral radiometers that collect three to ten broadband reflectance data for a cheaper cost. Spectral reflectance data have been used to create vegetation indices such as the normalized difference vegetation index (NDVI) and the simple ratio vegetation index (RVI) to assess crop growth, density, and fertility. Other indices such as the water band index (WBI) (narrowband index) and green-to-red ratio index (GRI) (both broadband and narrowband index) have been proposed to predict soil moisture status in turfgrass systems. The objective of this study was to compare the value of multispectral and hyperspectral radiometers to assess soil volumetric water content (VWC) and tall fescue (Festuca arundinacea Schreb.) responses. The multispectral radiometer VI had the strongest relationships to turfgrass quality, biomass, and tissue N accumulation during the trial period (April 2017–August 2018). Soil VWC had the strongest relationship to WBI (r = 0.60), followed by GRI and NDVI (both r = 0.54) for the 0% evapotranspiration (ET). Nonlinear regression showed strong relationships at high water stress periods in each year for WBI (r = 0.69–0.79), GRI (r = 0.64–0.75), and NDVI (r = 0.58–0.79). Broadband index data collected using a mobile multispectral sensor is a cheaper alternative to hyperspectral radiometry and can provide better spatial coverage.

Canopy spectral reflectance for crop water stress assessment in wheat ( Triticum aestivum, L.)*

2020 ◽  
Author(s):  
Narendra Singh Chandel ◽  
Yogesh Anand Rajwade ◽  
Kamlesh Golhani ◽  
Prem Shankar Tiwari ◽  
Kumkum Dubey ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Water Stress ◽  
Spectral Reflectance ◽  
Triticum Aestivum L ◽  
Crop Water ◽  
Stress Assessment ◽  
Canopy Spectral Reflectance ◽  
Crop Water Stress

Using spectral reflectance to document water stress in bermudagrass grown on water repellent sandy soils

2007 ◽  
Vol 21 (17) ◽  
pp. 2385-2389 ◽  
Author(s):  
Dara M. Park ◽  
John L. Cisar ◽  
Karen E. Williams ◽  
Dayle K. McDermitt ◽  
William P. Miller ◽  
...  
Keyword(s):  
Water Stress ◽  
Spectral Reflectance ◽  
Sandy Soils ◽  
Water Repellent

scholarly journals Spectral Reflectance Measurement of Fluorescent Matersals

1963 ◽  
Vol 11 (4) ◽  
pp. 181-184 ◽  
Author(s):  
Kazuo MURAKAMI ◽  
Shigeru KIMURA ◽  
Teizi NAKAGAWA
Keyword(s):  
Spectral Reflectance ◽  
Reflectance Measurement
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