2001 Annual Report for LNC00-168
Phosphorus Mobilization and Weed Suppression by Buckwheat.
Summary
2001 was the first year of the study. Ten fields (all certified for organic food production) were selected throughout the Red River Valley region of Minnesota. All fields have a history of diverse crop rotations, and have diverse soil types and topography. Soil, biomass, and insect samples were collected throughout the growing season and are being analyzed. The growing crop in each field will be sampled again in 2002 to determine the P contribution from buckwheat during the growing season. A complete analysis will be available in the final report (December 2002).
Objectives/Performance Targets
To assess the value of buckwheat as alternatives to black fallow in the crop rotations of the Red River Valley, to verify their value for 1) mobilizing soil P and other nutrients, 2) suppressing weeds, 3) conditioning the soil, 4) providing habitat to beneficial insects, and 5) suppressing diseases.
Accomplishments/Milestones
This was the first year of this study. Ten farms were identified for participation. Soil, buckwheat and weed biomass samples were collected from each field. In addition, insect traps were used to determine insect species and density level in each field when the buckwheat was in full-bloom. The soil, biomass, and insect samples are being analyzed for P concentration, as well as other elements. The insect samples collected are being separated by species and enumerated.
Impacts and Contributions/Outcomes
The impacts and outcomes will be assessed at the completion of the study. Based upon visual observations, buckwheat attracts a large population of beneficial insects during the flowering stage.