Phosphorous is non-renewable, scarce, exhibits high price variability, is expensive, and can cause substantial environmental impacts when discharged into fresh water systems. Soluble phosphorus from crop land can originate from manure and commercial fertilizers. Additionally, recent research ha shown that cover crop freeze/thaw cycles can leach soluble phosphorus as a result of plant tissue breakdown. Soluble phosphorus is quickly transported though macro pores. Once below the root zone and into tile drains, the phosphorus is essentially a lost resource. Results from a recently completed project are being formulated into the qualitative Practice Selector for Nutrient Retention Tool (PSNRT)....
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#water quality & management