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Published online 27 October 2006
Published in J Environ Qual 35:2374-2382 (2006)
DOI: 10.2134/jeq2006.0092
© 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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Soil Profile Distribution of Phosphorus and Other Nutrients following Wetland Conversion to Beef Cattle Pasture

Gilbert C. Siguaa,*, Woo-Jun Kangb and Sam W. Colemana

a USDA Agricultural Research Service, Subtropical Agricultural Research Station, Brooksville, FL 34601
b Water Resource Management, Florida Dep. of Environmental Protection, Tallahassee, FL USA 32399


Figure 1
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  		Fig. 1. Location of study site and soil sampling sites (beef cattle pastures, McIntosh pasture sites (MCP), and natural wetland, McIntosh wetland sites (MCW)).

 

Figure 2
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  		Fig. 2. Sequential fractionation method to determine different forms of P.

 

Figure 3
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  		Fig. 3. Comparative levels of the different forms of P between the improved pasture fields and natural wetlands. Forms of P are significantly different (p ≤ 0.05) when superscripts located at top of bars are different.

 

Figure 4
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  		Fig. 4. Correlation analyses showing the relationship between organic-bound P and soil organic carbon in improved beef cattle pastures.

 

Figure 5
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  		Fig. 5. Relative difference (%) in the concentrations of soil nutrients (water-soluble P (WSP), total nitrogen (TN), K, NH4–N, Ca, Mg, Zn, Mn, Fe, Al, and Na), levels of soil pH, and soil total organic carbon (TOC) as a result of converting natural wetlands to improved beef cattle pasture field (1940 through 2003).

 




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