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- W2380450189 abstract "Precision management of cotton information is an objective need to improve the management of cotton production and promote digital agricultural development.This article took Xiajin County of Shandong Province as a study area and selected remote sensing images of HJ-1 satellite in four different cotton growing seasons.The best phase to identify cotton was determined by analyzing phonological calendar and spectral characteristics of major crops.An extraction model was established to acquire cotton planting area information.Combining characteristic spectral index established at flower and boll stage with five kinds of main soil nutrients measured,cotton management zones were divided by correlation analysis,principal component analysis and K-means cluster analysis.The significant differences of the partition results were analyzed to evaluate the reasonableness.The results showed that the best phase to extract cotton area was bud stage and extraction accuracy was more than 93%.The OSAVI could reflect cotton growth information well and was significantly correlated with soil nutrients.Cotton field of the study area was divided into three management zones using principal component partition indicators.The first management zone accounted for 24.67% of the total area with the highest content of soil organic matter and N,P,K,and its cotton grew well.The second management zone accounted for 47.02% with medium soil nutrients and general cotton grew.The third management zone accounted for 28.31% with the lowest soil fertility and poor cotton grew.In each management partition,coefficient variation of soil nutrients decreased significantly.There were significantly statistical differences between mean soil nutrients and spectral data in different defined management zones,which showed the partition's high reasonableness.This research provides scientific basis of real-time and accurate cotton cultivation management for decision-making." @default.
- W2380450189 created "2016-06-24" @default.
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- W2380450189 date "2012-01-01" @default.
- W2380450189 modified "2023-09-23" @default.
- W2380450189 title "Extraction of Cotton Information Using Remote Sensing and Precision Management Zoning at County Scale" @default.
- W2380450189 hasPublicationYear "2012" @default.
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