Location: Crops Pathology and Genetics Research2010 Annual Report
1a. Objectives (from AD-416)
Characterize soil variability through a landscape-targeted approach emphasizing major soil landscape relationships to stratify the two winegrowing regions into geographic management templates; link greenhouse gas (GHG) emissions and vineyard nitrogen retention to these templates; Extend research findings.
1b. Approach (from AD-416)
Characteriztion of GHGs in response to vineyard floor management; Assessment of tradeoffs for weed pressure and N loss through leaching; Performance of life cycle analyses to assess whole vineyard GHG footprints; Repackage digital soil survey into geographical management templates that depict specific soil properties (and microclimates) that govern C and N dynamics and their respective affinities for C and N within the soil landscape; Develop a publication using a grower-friendly format, and include practical methods for measuring carbon (C) sequestration and reducing GHG emissions and nitrate leaching. Documents Trust with CDFA. Log 39936.
3. Progress Report
The agreement was established in support of Objective 4 of the in-house project, the goal being to investigate the impacts of vineyard practices on soil microbial ecology. The goal of this project is to characterize soil variability through a landscape-targeted approach emphasizing major soil landscape relationships to stratify the two winegrowing regions into geographical management templates and link greenhouse gas emissions and vineyard nitrogen retention to these templates. The goal of this research is to identify how vineyard management practices affect greenhouse gas (GHG) emissions, carbon (C) stocks, and GHG footprints. The study will occur in North Coast and San Joaquin Valley winegrowing regions. Deliverables include 1) `Best management practices' to increase nitrogen retention and balance production and weed control, 2) Calculation of C offsets potentially gained by reductions in nitrous oxide emissions and increases in soil C content, 3) A decision support system using a web-based GIS to enhance on-farm soil C stocks, 4) grower-friendly publication by partnering with National Center for Appropriate Technology. The onset of this project has been delayed due to the need to redraft the original budget, as well as the conversion of USDA/ARS financial system in spring 2010. The USDA/ARS accounting code was finally established in late April 2010. Despite this delay, collaborators on the grant have met several times to discuss the direction and coordination of this study. A gas chromatograph necessary for conducting this project has been acquired. Due to the delay in hiring, a staff person funded on 5306-21220-004-09R has been setting up the methods required for greenhouse gas analysis. Establishment of contracts with collaborators and initiation of the hiring process has commenced in order to begin the ‘on the ground’ research in the next few months. The funding agency is aware of these delays, and no cost extensions will be requested from the funding agency.