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Published online 1 January 2007
Published in Soil Sci Soc Am J 71:95-100 (2007)
DOI: 10.2136/sssaj2005.0324
© 2007 Soil Science Society of America
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Direct and Indirect Effects of Soil Properties on Phosphorus Retention Capacity

D. V. Ige, O. O. Akinremi* and D. N. Flaten

Dep. of Soil Science, Univ. of Manitoba, Winnipeg, MB, Canada R3T 2N2


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Fig. 1. Path diagram illustrating the relationship between soil properties and soil P retention capacity. Dij denotes the direct path; rij denotes the correlation coefficient; P retention index (PRI) is the soil P retention capacity; sand is the percentage of sand; CaM3, MgM3 and MnM3 denote Mehlich-3 extractable Ca, Mg, and Mn, respectively; AlOx and FeOx are the ammonium oxalate-extractable Al and Fe, respectively; and U is the residual estimated as where R2 is the coefficient of determination for the regression model (R2 = 0.88).

 





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