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Published online 26 April 2006
Published in J Environ Qual 35:928-937 (2006)
DOI: 10.2134/jeq2005.0409
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Predicting Phosphorus Availability from Soil-Applied Composted and Non-Composted Cattle Feedlot Manure

Francis Zvomuyaa, Bobbi L. Helgasonb, Francis J. Larneya,*, H. Henry Janzena, Olalekan O. Akinremic and Barry M. Olsond

a Agriculture and Agri-Food Canada, Lethbridge Research Centre, 5403 1st Avenue South, Lethbridge, AB, Canada T1J 4B1
b Land Resource Unit, Agriculture and Agri-Food Canada, 51 Campus Drive, Saskatoon, SK, Canada S7N 5A8
c Department of Soil Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
d Alberta Agriculture, Food and Rural Development, 5401 1st Avenue South, Lethbridge, AB, Canada T1J 4V6


Figure 1
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  		Fig. 1. Cumulative canola biomass at each of the 10 harvests in the bioassay. Vertical bars represent standard errors.

 

Figure 2
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  		Fig. 2. Modified Kelowna-extractable soil P measured at each of the 10 harvests in the bioassay. Vertical bars represent standard errors.

 

Figure 3
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  		Fig. 3. Cumulative phosphorus uptake (CPU) by canola plants measured at each of the 10 harvests in the bioassay. Vertical bars represent standard errors.

 

Figure 4
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  		Fig. 4. Predicted amendment-derived cumulative phosphorus uptake (ACPU) values (mg kg–1 amendment) from the one-factor partial least squares (PLS) model versus observed values for composted and non-composted manures used in the bioassay.

 




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Copyright © 2006 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.