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	An integrated framework for software to provide yield data cleaning and estimation of an opportunity index for site-specific crop management
	Sun W. ; Whelan B. ; Mcbratney A. B. ; Minasny B.
	2013
关键词	Precision agriculture Yield variability Spatial variation Yield maps Yield data trimming monitor data maps
英文摘要	This paper proposes an integrated framework for software that provides yield data cleaning and yield opportunity index (Y (i) ) calculation for site-specific crop management (SSCM). The artifacts in many yield data sets, which inevitably occur, can pose a significant effect on the validity of Yi. Automated and standardised yield correction procedures were designed to improve the data quality by removing: (1) unreasonable outliers; (2) distribution outliers (globally and locally); and (3) position errors. The calculation of Yi uses two aspects of crop yield assessment, the magnitude of yield variation and the spatial structure of the variation. The cleaning algorithms were applied to four yield data sets with known integrity issues to demonstrate effectiveness. Approximately 13-20 % of the original yield data were removed, and this resulted in an increased mean yield of 0.13 t/ha (average). The semivariograms of cleaned data were shown to possess smaller nugget values compared with the original data. The opportunity index calculation algorithm was demonstrated on a field with nine seasons of yield data. The results demonstrated that using a ranking of Yi provides a rational, agronomic assessment of the opportunity for SSCM based on the quantity and pattern of production variability displayed in yield data sets. This provides farm managers with a rapid way to assess whether the observed variability deserves further investigation and eventual investment in SSCM operations.
出处	Precision Agriculture
卷	14
期	4
页	376-391
收录类别	SCI
语种	英语
ISSN号	1385-2256
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30250]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Sun W.,Whelan B.,Mcbratney A. B.,et al. An integrated framework for software to provide yield data cleaning and estimation of an opportunity index for site-specific crop management. 2013.

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