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Mapping Surface Soil Organic Carbon for Crop Fields with Remote SensingThe organic C concentration of surface soil can be used in agricultural fields to vary crop production inputs. Organic C is often highly spatially variable, so that maps of soil organic C can be used to vary crop production inputs using precision farming technology. The objective of this research was to demonstrate the feasibility of mapping soil organic C on three fields, using remotely sensed images of the fields with a bare surface. Enough soil samples covering the range in soil organic C must be taken from each field to develop a satisfactory relationship between soil organic C content and image reflectance values. The number of soil samples analyzed in the three fields varied from 22 to 26. The regression equations differed between fields, but gave highly significant relationships with R2 values of 0.93, 0.95, and 0.89 for the three fields. A comparison of predicted and measured values of soil organic C for an independent set of 2 soil samples taken on one of the fields gave highly satisfactory results, with a comparison equation of % organic C measured + 1.02% organic C predicted, with r2 = 0.87.
Document ID
20040047248
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Chen, Feng
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Kissel, David E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
West, Larry T.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Rickman, Doug
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Luvall, J. C.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Adkins, Wayne
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Earth Resources And Remote Sensing
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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