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Although Best Management Practices (BMPs) have been developed to reduce the loss of nutrients, like P, to the environment, limited information exists on the main factors that control P loss to Florida groundwater. For example, while it is generally accepted that both irrigation and fertilizer P impact groundwater P, growers often ask if controlling one is more advantageous than the other in their efforts to reduce P leaching. There exists no easy tool to link fertilizer P input and other factors to groundwater P concentration. This 5-page fact sheet uses long-term data (six growing seasons) from a farm in Immokalee, Florida, to explain the effects of soil and agronomic factors, along with seasonal rainfall, on groundwater P. From these factors are derived simple equations to predict groundwater P concentrations. Written by Sanjay Shukla, Gregory S. Hendricks, Thomas A. Obreza, and Willie Harris, and published by the UF Department of Agricultural and Biological Engineering, August 2014.
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Hendricks, G.S., S. Shukla, T.A. Obreza, and W.G. Harris. 2014. Measurement and modeling of phosphorous transport in shallow groundwater environments. Journal of Contaminant Hydrology 164: 125-137. Available at http://dx.doi.org/10.1016/j.jconhyd.2014.05.003 https://doi.org/10.1016/j.jconhyd.2014.05.003
Shukla, S., G.S. Hendricks, T.A. Obreza, and W.G. Harris. 2014. BMP-Recommended Water and Phosphorus Inputs for Tomato and Watermelon Can Reduce Environmental Losses of Phosphorus and Save Water. Gainesville: University of Florida Institute of Food and Agricultural Sciences. https://edis.ifas.ufl.edu/ae504. https://doi.org/10.32473/edis-ae504-2014