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Published online 17 July 2007
Published in J Environ Qual 36:1310-1317 (2007)
DOI: 10.2134/jeq2006.0314
© 2007 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 Runoff of Suspended Solids and Particulate Phosphorus for Selected Louisiana Soils Using Simple Soil Tests

Theophilus K. Udeigwea, Jim J. Wanga,* and Hailin Zhangb

a School of Plant, Environmental, and Soil Sciences, Sturgis Hall, Louisiana State Univ. Agricultural Center, Baton Rouge, LA 70803
b Dep. of Plant and Soil Sciences, Oklahoma State Univ., Stillwater, OK 74078. Contribution of Louisiana Agric. Exp. Stn. Journal No. 06-14-0300 and is published with the approval of the Director


Figure 1
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Fig. 1. Relationship between runoff total suspended solids (TSS) and runoff turbidity for selected Louisiana soils.

 

Figure 2
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Fig. 2. Relationships between runoff particulate phosphorus (PP) and runoff total suspended solids (TSS) for selected Louisiana soils.

 

Figure 3
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Fig. 3. Relationships between runoff characteristics and soil clay content for selected Louisiana soils: (a) runoff total suspended solids (TSS) and soil clay content; (b) runoff turbidity and soil clay content.

 

Figure 4
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Fig. 4. Relationship between soil suspension turbidity (SST) and soil clay content. The SST was measured based on 24 h shaking followed by 7 h settling.

 

Figure 5
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Fig. 5. Relationship between runoff total suspended solids (TSS) and soil suspension turbidity (SST) measured after: (a) 1 h shaking, no settling; (b) 1 h shaking, 7 h settling; (c) 24 h shaking, no settling (d); 24 h shaking, 7 h settling.

 

Figure 6
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Fig. 6. Relationship between runoff turbidity and soil suspension turbidity (SST). The SST was measured after 24 h shaking followed by 7 h settling.

 

Figure 7
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Fig. 7. Relationship between runoff total suspended solids (TSS) and soil electrical conductivity (EC). Soil EC was measured in 1:2 soil/water mixture.

 

Figure 8
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Fig. 8. Relationship between runoff particulate phosphorus (PP) and soil electrical conductivity (EC). Soil EC was measured in 1:2 soil/water mixture.

 





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