Anne H. Hallee

Anne H. Hallee

Anne H. Hallee

The Evergreen State College, Chemistry and Nutrient Management Studies | "Phosphorus Availability in Composts of Varying Feedstocks"

Olympia, WA | risingupfarm.anne@gmail.com

Anne Hallee earned a Bachelor of Science Degree from the Evergreen State College with a focus in Chemistry.  She has 20 years of experience as an organic vegetable farmer and has worked extensively with dairy and beef farmers in New England as an advising Nutrient Management Planner, and Resource Conservation Planner.

Session Code: B2

Session Name: Research Updates

Session Time: Tues, January 26, Round 2, 4:00-5:00 PM EST

Session Description: Join the Composting Council Research and Education Foundation for reports on key research they are supporting and encouraging

Presentation Title: Phosphorus Availability in Composts of Varying Feedstocks

Presentation Description: The U.S. composting industry has very little comparative analysis on the levels of available phosphorus typically found in municipality generated composts. Urban communities across the country are running curb side green waste and food waste collection programs that feed into static aerated composting facilities for community waste reduction and recyling.  Foodwaste based compost is a relatively new widespread urban recycling product, and very little guidance is available for consumers on how to apply these varying compost products in watersheds sensitive to phosphorus runoff.  Compared to composts comprised traditionally of animal manures and bedding, how much phosphorus can we expect from green waste based and food waste based composts? This presentation will discuss the findings of a year long study investigating phosphorus availability in composts of varying feedstocks broken into three categories:

  • Manure based compost- comprised of greater than 30% animal manures and bedding generated on farms.
  • Green Waste based compost – comprised of greater than 90% municipally collected yard wastes, grass clippings, brush, leaves, chipped wood debris etc.
  • Food Waste based compost – comprised of greater than 10% municipally collected source separated organics from curb side collection