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Published online 27 October 2006
Published in J Environ Qual 35:2212-2221 (2006)
DOI: 10.2134/jeq2006.0085
© 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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Degree of Phosphorus Saturation Thresholds in Manure-Amended Soils of Alberta

Janna P. Cassona,*, D. Rodney Bennetta, Sheilah C. Nolanb, Barry M. Olsona and Gerald R. Ontkeana

a Alberta Agriculture, Food and Rural Development, 100, 5401 1st Avenue South, Lethbridge, AB, Canada T1J 4V6
b Alberta Agriculture, Food and Rural Development, 206, 7000 113 Street, Edmonton, AB, Canada T6H 4Z9


Figure 1
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  		Fig. 1. Relationship between the Alberta Model P sorption capacity (PSC) and (a) the CaCl2–P sorption index (CaCl2 PSI) and (b) the KCl P sorption index (KCl PSI).

 

Figure 2
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  		Fig. 2. Relationships between (a) modified Kelowna soil-test P (STP) and water-extractable P (WEP); (b) modified Kelowna-based degree of P saturation (DPS) and WEP; (c) STP and CaCl2-extractable P (CaCl2–P); and (d) DPS and CaCl2–P in five Alberta soils.

 




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