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Research ArticleResearchR

Use of sequential aerial photographs to detect and monitor soil management changes affecting cropland erosion

P. R. Stephens, J. L. Daigle and J. Cihlar
Journal of Soil and Water Conservation March 1982, 37 (2) 101-105;
P. R. Stephens
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J. L. Daigle
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J. Cihlar
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ABSTRACT:

Interpretation of sequential aertal photographs enabled land planners in New Brunswick to detect and monitor the effects of changes in soil management practices on cropland erosion. Sequential aerial photographs taken between 1944-1945 and 1980 provided a permanent, chronological landscape record. Used in conjunction with the universal soil loss equation, these photographs showed that where soil conservation systems had not been constructed the net effect of soil management changes had resulted in an increase in the average annual erosion rate of at least 5.3 times over the 1944-1945 rate. Where systems had been constructed, the erosion rate increased 1.2 times. As well as showing the nature and approximate date of management changes, the photographs located precisely the changes. This permitted yield plots to be located to establish relationships between crop yield and past erosion rates. A potato yield reduction of 16 percent was recorded in 1980 on replicated plots with the same present, but different past, management and erosion levels.

Footnotes

  • P. R. Stephens, with the Water and Soil Division, Ministry of Works and Development. Palmerston North, New Zealand, is a visiting scientist in the Applications Division of the Canada Centre for Remote Sensing, Ottawa. Ontario, K1A 0Y7. J. L. Daigle is a soil conservation engineer with the Department of Agriculture and Rural Development, Grand Falls, New Brunswick. J. Cihlar is a scientist in the Applications Division of the Canada Centre for Remote Sensing. The authors thank R. A. Ryerson and D. R. Coote who reviewed an carly draft of this manuscript. Dr. Ryerson also supplied 1975 ground data collected by the New Brunswick Department of Agriculture and Rural Development.

  • Copyright 1982 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 37 (2)
Journal of Soil and Water Conservation
Vol. 37, Issue 2
March/April 1982
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Use of sequential aerial photographs to detect and monitor soil management changes affecting cropland erosion
P. R. Stephens, J. L. Daigle, J. Cihlar
Journal of Soil and Water Conservation Mar 1982, 37 (2) 101-105;

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Use of sequential aerial photographs to detect and monitor soil management changes affecting cropland erosion
P. R. Stephens, J. L. Daigle, J. Cihlar
Journal of Soil and Water Conservation Mar 1982, 37 (2) 101-105;
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