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Research ArticleResearch Section

Monitoring and predicting manure application rates using precision conservation technology

P. E. Cabot, F. J. Pierce, P. Nowak and K. G. Karthikeyan
Journal of Soil and Water Conservation September 2006, 61 (5) 282-292;
P. E. Cabot
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F. J. Pierce
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P. Nowak
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K. G. Karthikeyan
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ABSTRACT:

A side-discharge manure spreader was retrofitted with precision conservation technology. Lateral patterns and swath widths remained relatively constant with peaks in lateral application rates (kg ha−1) at 4 to 6 m (13 to 20 ft) (liquid manure) and at 2 to 7 m (7 to 23 ft) and 20 to 25 m (66 to 82 ft) (solid manure) from the spreader. A “dump zone” of thicker manure application occurred for the initial 0 to 6 m of travel (liquid manure). The minimum scale of precision that can be achieved realistically with this type of equipment depends on the swath width. Results suggest that nitrogen (N) is less manageable than soil phosphorus levels and organic matter by simply retrofitting side-discharge spreaders with precision technology. Lateral pattern of measured application rate was fitted to a three-parameter function using the gamma (1) distribution. Regression of measured liquid manure application rates samples against predicted rates was significant (R2 > 0.80; p < 0.01). The average accuracy of predicted values was ±10 percent, excluding one outlier.

Footnotes

  • Perry E. Cabot is a postdoctoral research associate in the Department of Biological Systems Engineering and Nelson Institute for Environmental Studies at the University of Wisconsin-Madison, Madison, Wisconsin. Francis J. Pierce is a professor in the Department of Biological Systems Engineering and the Center for Precision Agricultural Systems at Washington State University, Prosser, Washington. Pete Nowak is a professor in the Department of Rural Sociology and the Nelson Institute for Environmental Studies at the University of Wisconsin-Madison in Madison, Wisconsin. K.G. Karthikeyan is an associate professor in the Department of Biological Systems Engineering at the University of Wisconsin-Madison in Madison, Wisconsin.

  • Copyright 2006 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 61 (5)
Journal of Soil and Water Conservation
Vol. 61, Issue 5
September/October 2006
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Monitoring and predicting manure application rates using precision conservation technology
P. E. Cabot, F. J. Pierce, P. Nowak, K. G. Karthikeyan
Journal of Soil and Water Conservation Sep 2006, 61 (5) 282-292;

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Monitoring and predicting manure application rates using precision conservation technology
P. E. Cabot, F. J. Pierce, P. Nowak, K. G. Karthikeyan
Journal of Soil and Water Conservation Sep 2006, 61 (5) 282-292;
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