Published online 2 December 2005
Published in Soil Sci Soc Am J 70:163-171 (2006)
DOI: 10.2136/sssaj2005.0102
© 2005 Soil Science Society of America
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Phosphorus Loss in Runoff from Long-term Continuous Wheat Fertility Trials
H. Zhanga,
J. L. Schrodera,*,
R. L. Davisc,
J. J. Wangd,
M. E. Paytonb,
W. E. Thomasone,
Y. Tangf and
W. R. Rauna
a Dep. of Plant and Soil Sciences
b Dep. of Statistics, Oklahoma State Univ., Stillwater, OK 74078
c Apex Environmental Inc., Lenexa, KS 66215
d Dep. of Agronomy and Environmental Management, Louisiana State Univ., Baton Rouge, LA 70803
e Dep. of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061
f Yangzhou Univ., Jiangsu, China

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Fig. 1. The relationships between Mehlich-3 P and P added for the three individual study soils and all soils combined. ***p < 0.001.
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Fig. 2 The relationships between runoff dissolved reactive P and (A) Mehlich3 P for the three individual study soils and all soils combined or (B) water soluble P for the three individual study soils and all soils combined. ***p < 0.001.
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Fig. 3 The relationships between runoff dissolved reactive P and phosphorus saturation index calculated with acid ammonium oxalate extractable data (PSIox) for the three individual study soils and all soils combined. ***p < 0.001.
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Fig. 4 The relationships between DRP load and (A) Mehlich3 P for the three individual study soils and all soils combined or (B) water soluble P for the three individual study soils and all soils combined. ***p < 0.001, *p < 0.05.
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Copyright © 2005 by the Soil Science Society of America.