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Science in action to improve the sustainability of agriculture, natural resources, and food systems
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Growing nitrogen in the organic orchard

Grant Information

  • Project ID: 046
  • Project Status: Complete

2008

  • Principal Investigator(s): Davenport, J.
  • Investigator(s): Granatstein, D.
  • Grant Amount: $13,698
  • 2008 Progress Report

2009

  • Principal Investigator(s): Davenport, J.
  • Investigator(s): Granatstein, D.
  • Grant Amount: $13,013
  • 2009 Progress Report

2010

  • Principal Investigator(s): Davenport, J.
  • Investigator(s): Granatstein, D.
  • Grant Amount: $15,874
  • 2010 Progress Report

Publications

Mullinx, K. and Granatstein, D. 2011. Potential nitrogen contributions from legumes in Pacific Northwest apple orchards. Intl. J. Fruit Sci. 11:74-87.

Granatstein, D.*, Wiman, M., Kirby, E., Mullinix, K. 2010. Sustainability trade-offs in organic orchard floor management. Acta Hort. 873:115-122.

Samples are still being analyzed for Year 3 and manuscripts will be prepared once all data are analyzed.

Additional Funds Leveraged

None – proposals were not funded.

Impacts

In 2010, the cooperating grower in one on-farm trial expanded the practice we are testing to an additional 80 acres. I personally viewed the fields. A neighboring farm adopted the practice on 20 ac that I personally viewed. The cooperating grower on the other project applied the practices on over 100 acre of orchard. This grower also qualified for $80,000 in EQIP funds for the practices. In a recent grower survey (n=74), 51% of the growers reported use of legume cover crops to supply nitrogen in their orchards, which is the focus of one of the research projects. NRCS is now cost sharing this practice and a training for NRCS staff is scheduled for May 2011.