Spatial Prediction of wheat crop yield Using Digital Soil Mapping in Gotvand, Khuzestan Province

Document Type : Research Paper

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Abstract

A number of 110 observed crop yields were correlated with auxiliary variables (DEM and Landsat images) using genetic programming (GP) in Gotvand area (Khuzestan Province). The spatial prediction map of wheat crop yield was prepared using the obtained equation. Wrapper algorithm identified some more important auxiliary variables Nof: DVI, SAVI, and wetness index and channel network based level. RMSE, coefficient of determination and Lin's concordance coefficient of GP (1) with all the auxiliary data were obtained as 525.11, 0.87 and 0.82, respectively. Moreover, results indicated GP (2) with auxiliary data selected through wrapper algorithm could also reasonably predict wheat crop yield (RMSE, coefficient of determination and Lin's concordance coefficient, 530.82, 0.86 and 0.79, respectively). It can, therefore, be recommended to use the same approach to predict spatial distribution of crop yields in the future studies.  

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References

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Iranian Journal of Soil and Water Research
Volume 47, Issue 1
July 2016
Pages 175-184

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