Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance
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), till...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | International Journal of Agronomy |
| Online Access: | http://dx.doi.org/10.1155/2011/426582 |
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| author | Abdullah A. Jaradat |
| author_facet | Abdullah A. Jaradat |
| author_sort | Abdullah A. Jaradat |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-94dfa630bafc4c6d8320b0d52f44cb3f |
| institution | Kabale University |
| issn | 1687-8159 1687-8167 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
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| series | International Journal of Agronomy |
| spelling | doaj-art-94dfa630bafc4c6d8320b0d52f44cb3f2025-02-03T05:46:36ZengWileyInternational Journal of Agronomy1687-81591687-81672011-01-01201110.1155/2011/426582426582Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield VarianceAbdullah A. Jaradat0United States Department of Agriculture, Agricultural Research Service, 803 Iowa Avenue, Morris, MN 56267, USAFarmers' 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.http://dx.doi.org/10.1155/2011/426582 |
| spellingShingle | Abdullah A. Jaradat Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance International Journal of Agronomy |
| title | Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance |
| title_full | Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance |
| title_fullStr | Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance |
| title_full_unstemmed | Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance |
| title_short | Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance |
| title_sort | dynamics of mean variance skewness of cumulative crop yield impact temporal yield variance |
| url | http://dx.doi.org/10.1155/2011/426582 |
| work_keys_str_mv | AT abdullahajaradat dynamicsofmeanvarianceskewnessofcumulativecropyieldimpacttemporalyieldvariance |