Lecture 3: Reduction of soil P loss through amendment additions

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Discusses how to reduce P loss from soils though addition of amendments, with a focus on water treatment residues (WTRs) and biochar amendments.

• References
  • Dari, B. 2015. Predicting soil phosphorus loss and its potential remediation through biochar application. Ph.D. diss., University of Florida., Gainesville, Florida, USA.
  • Oladeji, O.O., G.A. O’Connor, J.B. Sartain, and V.D. Nair. 2007. Controlled Application Rate of Water Treatment Residual for Agronomic and Environmental Benefits. J Environ. Qual. 36:1715-1724.

Lecture 4: Natural and anthropogenic sources of P

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Examines differences in P loss risk from natural and anthropogenic sources of P (e.g., dairies or inorganically-fertilized soils), paying particular attention to some of the other components of the P source.

• References
  • Chakraborty, D., V.D. Nair, and W.G. Harris. 2012. Compositional differences between Alaquods and Paleudults affecting phosphorus sorption-desorption behavior. Soil Sci. 177:188–196.
  • Osborne, T.Z., V.D. Nair, L.R. Ellis, D. Chakraborty, W.G Harris, and K. R. Reddy. 2012. Kissimmee River Sediment and Floodplain Soil Nutrient Assessment. Final Report to the South Florida Water Management District, West Palm Beach, FL.

Lecture 5: Risk assessment of wetland soils

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Discusses phosphorus storage and release from P-impacted wetland soils and describes conventional risk assessment techniques and the use of SPSC for wetland soils.

• References
  • Nair, V.D., M. W. Clark, and K.R. Reddy. 2015. Evaluation of legacy phosphorus storage and release from wetland soils. J. Environ. Qual. 44: 1956 – 1964. doi:10.2134/jeq2015.03.0154.
  • Nair, V.D., and K.R. Reddy. 2013. Phosphorus sorption and desorption in wetland soils. pp 667 – 678. In: DeLaune, R., Reddy, K.R., Richardson, C.J., and Megonigal, P. (ed). Methods on biogeochemistry of wetlands. Soil Science Society of America Publication.
  • Reddy, K.R., S. Grunwald, V.D. Nair, and Y. Wang, 2006. Baseline Characterization of the Taylor Creek Pilot Storm Treatment Areas (STA) in the Lake Okeechobee Watershed, West Palm Beach, Florida: South Florida Water Management.

Next - Module 6: Other Applications of the PSR and SPSC Concepts