TY - CHAP
T1 - Sampling and spatial analysis techniques for quantifying soil map unit composition
AU - Ferguson, Richard B.
AU - Hergert, Gary W.
N1 - Publisher Copyright:
© 1999 by the American Geophysical Union.
PY - 1998
Y1 - 1998
N2 - In the United States, the county soil survey is currently the most widely available spatial data resource for production agriculture. Most counties with significant agriculture are mapped with a modem survey. However, current surveys are often inadequate for applications of precision agriculture requiring differential management within fields or as sources of input data for non-point source pollutant models of the vadose zone. Current county surveys are mapped at resolutions which are too coarse for site-specific management applications, and contain little or no information regarding the variability of map unit composition, primarily because of the expense associated with sample collection. Soil survey has traditionally used aerial photographs, transect sampling, and classical statistical analysis combined with qualitative classification by professional soil surveyors to define soil map units. Recent advances in the collection and analysis of spatial soils information is likely to significantly change soil survey methodology. Future soil surveys will incorporate various remote-sensing technologies (aircraft and satellite-based optical platforms, electromagnetic induction, ground-penetrating radar and real-time contact sensors), will be digitally based, mapped at finer scales, and contain quantitative descriptions of map unit composition and variability. Pedotransfer functions and geostatistical analysis techniques will be used to provide more accurate estimates of soil qualities at unsampled points. Site-specific management applications will use this type of soil survey, along with digital orthophotographs and digital elevation models, as a base upon which more detailed, localized spatial information derived from crop yield maps and other producer-generated layers of information can be overlaid.
AB - In the United States, the county soil survey is currently the most widely available spatial data resource for production agriculture. Most counties with significant agriculture are mapped with a modem survey. However, current surveys are often inadequate for applications of precision agriculture requiring differential management within fields or as sources of input data for non-point source pollutant models of the vadose zone. Current county surveys are mapped at resolutions which are too coarse for site-specific management applications, and contain little or no information regarding the variability of map unit composition, primarily because of the expense associated with sample collection. Soil survey has traditionally used aerial photographs, transect sampling, and classical statistical analysis combined with qualitative classification by professional soil surveyors to define soil map units. Recent advances in the collection and analysis of spatial soils information is likely to significantly change soil survey methodology. Future soil surveys will incorporate various remote-sensing technologies (aircraft and satellite-based optical platforms, electromagnetic induction, ground-penetrating radar and real-time contact sensors), will be digitally based, mapped at finer scales, and contain quantitative descriptions of map unit composition and variability. Pedotransfer functions and geostatistical analysis techniques will be used to provide more accurate estimates of soil qualities at unsampled points. Site-specific management applications will use this type of soil survey, along with digital orthophotographs and digital elevation models, as a base upon which more detailed, localized spatial information derived from crop yield maps and other producer-generated layers of information can be overlaid.
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U2 - 10.1029/GM108p0079
DO - 10.1029/GM108p0079
M3 - Chapter
AN - SCOPUS:85005995063
SN - 9780875900919
T3 - Geophysical Monograph Series
SP - 79
EP - 91
BT - Assessment of Non-Point Source Pollution in the Vadose Zone, 1999
A2 - Corwin, Dennis L.
A2 - Loague, Keith
A2 - Ellsworth, Timothy R.
PB - Blackwell Publishing Ltd
ER -