Environmental Quality and Waste Management at OSU

Nutrient Management


In Eastern Oklahoma and other areas of the state there has been a substantial buildup of P in the soil where manure has been used extensively as fertilizer for pasture, grain, vegetable, or horticultural crops.  Excessively high P can make soils potential pollution sources for area lakes and rivers.  Crops and cropping systems to mine P from high P-soils and alternative management may reduce the impact of these soils on water quality.  However, much is still unknown about the Phosphorus cycle, and both research and extension are needed to develop improved management practices and management decision tools.  The PPM Calculator is one such tool, developed in order to assist decisions that could benefit crop production and water quality concurrently.

For more information contact Hailin Zhang 405-744-9566

EQWM Project Highlights

  • PPM Calculator Helps Ranchers Manage Phosphorus in Nutrient Sensitive Watersheds
  • Homeowner Nutrient Management Outreach April 2008: Conference entitled "Managing Lawns, Gardens, and Golf Courses to Protect Water Quality in Grand Lake" was conducted in Grove, OK April 17, 2008 and offered by OSU Cooperative Extension, Oklahoma Conservation Commission, US EPA, and Grand Lake Association.  Materials utilized included Hailin Zhang's and William Raun's 2008 extension publication Oklahoma Homeowner's Handbook of Soil and Nutrient Management, 2nd ed..   Thirty-five people attended, and more Grand Lake watershed citizens have been exposed to the materials through Oklahoma Conservation Commission's CLEAR GRAND web site.
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