Development and performance tests of an on-the-go detector of soil total nitrogen concentration based on near-infrared spectroscopy

2021 ◽  
Author(s):  
Peng Zhou ◽  
Minzan Li ◽  
Wei Yang ◽  
Xiangqian Yao ◽  
Zhen Liu ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Total Nitrogen ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Nitrogen Concentration ◽  
Performance Tests ◽  
Soil Total Nitrogen ◽  
Total Nitrogen Concentration ◽  
And Performance

Comparison of multivariate methods for estimating soil total nitrogen with visible/near-infrared spectroscopy

2012 ◽  
Vol 366 (1-2) ◽  
pp. 363-375 ◽  
Author(s):  
Tiezhu Shi ◽  
Lijuan Cui ◽  
Junjie Wang ◽  
Teng Fei ◽  
Yiyun Chen ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Total Nitrogen ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Multivariate Methods ◽  
Soil Total Nitrogen

Spectrometric prediction of secondary metabolites and nitrogen in fresh Eucalyptus foliage: towards remote sensing of the nutritional quality of foliage for leaf-eating marsupials

2002 ◽  
Vol 50 (6) ◽  
pp. 761 ◽  
Author(s):  
M. J. H. Ebbers ◽  
I. R. Wallis ◽  
S. Dury ◽  
R. Floyd ◽  
W. J. Foley
Keyword(s):  
Total Nitrogen ◽  
Near Infrared ◽  
Leaf Surface ◽  
Nitrogen Concentration ◽  
Near Infrared Reflectance ◽  
Ecological Attributes ◽  
Total Nitrogen Concentration ◽  
Volatile Terpene ◽  
Water Absorbance

Near-infrared reflectance spectroscopy provides an excellent means of assessing the chemical composition of Eucalyptus foliage but the standard methods of drying and grinding the samples limit the speed at which spectra can be collected and thus are unsuitable for measurements in the field. We investigated whether reliable spectra could be collected from whole fresh and dry leaves of E. melliodora and E. globulus and whether we could predict the concentration of total nitrogen, the volatile terpene, 1,8 cineole and the phenolic antifeedant compound, sideroxylonal A, from these spectra. Water absorbance peaks did not obscure the absorption spectrum of 1,8 cineole and so cineole concentration was readily predicted from spectra of whole, fresh E. melliodora leaves. Similarly, both total nitrogen and sideroxylonal A could be predicted from spectra of fresh leaf in E. melliodora even though water absorption obscured some spectral features. The predictions of cineole and total nitrogen concentration in E. globulus were not as good as those in E. melliodora, possibly due to interference from waxes on the leaf surface of E. globulus juvenile foliage. Overall, these results suggest that certain important ecological attributes of Eucalyptus foliage can be predicted from spectra of whole fresh leaves. Thus, it is feasible to investigate the collection of spectra by portable or airborne spectrophotometry.

Soil total nitrogen concentration explains variation in pasture response to spring nitrogen fertiliser across a single farm

2015 ◽  
Vol 101 (3) ◽  
pp. 377-390 ◽  
Author(s):  
Mark Shepherd ◽  
Anwar Ghani ◽  
Gordon Rajendram ◽  
Bill Carlson ◽  
Maryann Pirie
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Concentration ◽  
Soil Total Nitrogen ◽  
Nitrogen Fertiliser ◽  
Total Nitrogen Concentration

Determination of Total Nitrogen, Ammonia, and Nitrite in River Water by Near-infrared Spectroscopy and Chemometrics

2017 ◽  
Vol 50 (10) ◽  
pp. 1620-1629 ◽  
Author(s):  
Jian Huang ◽  
Pei-ran Liu ◽  
Qing-ye Sun ◽  
Hua Zhang ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
River Water ◽  
Total Nitrogen ◽  
Near Infrared Spectroscopy ◽  
Near Infrared
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