Phosphorus Runoff Risk Evaluator (PRRE)

Supports EQIP including CNMP

Nutrient management is an important part of NRCS conservation planning, particularly in the development of Comprehensive Nutrient Management Plans (CNMP) for livestock operations. Farmers can obtain cost-share funding through the EQIP program to implement these plans, in accordance with the NRCS Nutrient Management Standard 590 (NRCS-USDA eFOTG) and ensure that manure is applied in a manner that benefits crop production without degrading natural resources or increasing water pollution risks.

Assessing the risk of phosphorus pollution from a given field or fields is one of the first steps in nutrient management planning. However, mainland tools and indices do not adequately model phosphorus behavior in tropical soils, particularly andisols (volcanic soils) and highly weathered soils (oxisols and ultisols). So PRRE, a local phosphorus risk assessment tool was developed by the University of Hawaii, in cooperation with Hawaii NRCS staff under the auspices of the TTC to address this issue in the tropics. PRRE is a stand-alone Windows-based computer decision support system that uses field-specific information to develop a phosphorus pollution risk rating. It also provides suggested management options for the landowner/manager.

• Phosphorus Runoff Risk Evaluator (PRRE) Software
• The Phosphorus Index, Hawaiian Style (Paper presented at the 2003 Western Nutrient Management Conference, Salt Lake City, UT)

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