Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance
Author
Source
International Journal of Agronomy
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-07-28
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Farmers' decision to adopt new management or production system depends on production risk.
Grain yield data was used to assess production risk in a field experiment composed of two cropping systems (CNV and ORG), each with eight subsystems (two levels each of crop rotation (2-yr and 4-yr), tillage management (conventional, CT and strip, ST), and fertilizer input (fertilized, YF and non-fertilized, NF)).
Statistical moments, cumulative yield (CY), temporal yield variance (TYV) and coefficient of variation (CV) were used to assess the risk associated with adopting combinations of new management practices in CNV and ORG.
The mean-variance-skewness (M-V-S) statistics derived from yield data separated all 16 subsystems into three clusters.
Both cropping systems and clustered subsystems differed as to their ability to maintain a constant yield over years, displayed different yield cumulative probabilities, exhibited significant and different M-V-S relationships, and differed as to the reliability of estimating TYV as a function of CY.
Results indicated that differences in management among cropping systems and subsystems contributed differently to the goal of achieving yield potential as estimated by the cumulative density function, and that certain low-input management practices caused a positive shift in yield distribution, and may lower TYV and reduce production risk.
American Psychological Association (APA)
Jaradat, Abdullah A.. 2011. Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance. International Journal of Agronomy،Vol. 2011, no. 2011, pp.1-9.
https://search.emarefa.net/detail/BIM-471298
Modern Language Association (MLA)
Jaradat, Abdullah A.. Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance. International Journal of Agronomy No. 2011 (2011), pp.1-9.
https://search.emarefa.net/detail/BIM-471298
American Medical Association (AMA)
Jaradat, Abdullah A.. Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance. International Journal of Agronomy. 2011. Vol. 2011, no. 2011, pp.1-9.
https://search.emarefa.net/detail/BIM-471298
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-471298