National Phosphorus Research Project Objectives / Mission
The general objective of the National Phosphorus Projects is to develop a scientific basis for recommendations to manage phosphorus (P) in a sustainable manner within agricultural operations.
Specific objectives are:
1) Determine threshold soil P levels in benchmark soils above which the potential for P loss in surface runoff and subsurface flow increases dramatically, and relate these thresholds to soil P sorption capacity, site hydrology, soil map units, and other soil and site characteristics.
2) Develop a P index to identify and rank site vulnerability to P loss at field and watershed scales that is easily implementable under the range of landscape settings of the U.S.
3) Integrate the soil P thresholds and P index information into a Comprehensive Nutrient Management Planning software package.
4) As a long-term goal, develop models that predict P loss at field and watershed scales, aggregate landscape processes, and extend the effects of land use and management distributed over the watershed to downstream point of water quality impact