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- W2372856737 abstract "【Objective】The objective of this paper is to estimate the wheat yield using modified spectral angle algorithm based on the datasets of field hyperspectral data and yield measured destructively during critical growth stages.【Method】The field experiments were conducted at Beijing,wheat growing season in 2006 to 2007 involving two cultivars and four nitrogen rates.Based on the characteristics of the canopy reflectance in visible and near infrared regions effected by nitrogen nutrition,the spectral angle algorithm for monitering nitrogen nutrition of canopy wheat was established.【Result】The result showed that nitrogen was more different for wheat yield difference than yield.The spectral angle of different wheat cultivars had significant difference during various growth stages and nitrogen rates,and there were more changse at early stage than(that of) later stage.Furthermore,the spectral angle among nitrogen rates were N0-2 N0-3 N0-1.Finally,spectral angle and wheat yield were significant secondary linear relations,and the determination coefficient was 0.784 4.【Conclusion】Hence,spectral angle may provide effective and feasible means of monitoring wheat yield in field by spectral angle." @default.
- W2372856737 created "2016-06-24" @default.
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- W2372856737 date "2011-01-01" @default.
- W2372856737 modified "2023-09-24" @default.
- W2372856737 title "Studies Monitoring Yield of Winter Wheat with a Modified Spectral Angle Algorithm" @default.
- W2372856737 hasPublicationYear "2011" @default.
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