Dr. Joan R. Davenport

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  www.wawgg.org/index.php?page_id=28&PHPSESSID=4b4e23ccfc - [Cached Version]
  Published on: 5/3/2006    Last Visited: 10/29/2009  

  Joan Davenport, Ph.D. 509-786-9384 Plant & Soil Nutrition jdavenp@wsu.edu

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  member.principalhealthnews.com/article/healthday/699484 - [Cached Version]
  Published on: 10/30/2008    Last Visited: 11/7/2008  

  Joan R. Davenport, a professor of soil science in the Department of Crop and Soil Sciences at Washington State University, thinks a lot more study needs to be done to figure out how these heavy metals are ending up in wine.
  
  "Knowing what I know about not only growing wine grapes but the whole process of turning them into wine and looking at some of the countries where these wines came from, it makes me wonder what may happen in the processing," Davenport said.
  
  A lot of the heavy metals found in the wines in the study, exist in only very small quantities in soil, Davenport said. "The likelihood of that being in the grapes isn't very likely," she said. The contamination could be coming from the metal barrels used in processing the wine, she added.
  
  Davenport isn't worried that these metals are a health problem. "I'm not going to drink any less wine," she said.
  ...
  SOURCES: Declan Naughton, Ph.D., professor, biomolecular sciences, Kingston University, South West London, U.K.; Joan R. Davenport, Ph.D., professor, Department of Crop and Soil Sciences, Washington State University, Prosser; Gladys Horiuchi, communications manager, Wine Institute, San Francisco; Oct. 30, 2008, Chemistry Central Journal, online

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  www.washingtonwinefoundation.org/index.php?page_id=12&n - [Cached Version]
  Published on: 11/1/2004    Last Visited: 8/12/2008  

  Joan Davenport, an associate soil scientist with Washington State University, lent her expertise to the creation of the soil and water management riskbusters.She notes that wine grapes in Washington are grown either in sandy soil close to rivers, or in silt loam further inland.While both soils are low in organic matter, silt loam has more nutrient-holding capacity.She recommends that a new vineyard owner locate his or her site in a county soil survey to determine soil texture and water-holding capacity, and then submit soil samples to a commercial laboratory to test for present nutrients, pH, salts and other chemical characteristics.
  
  After answering the questions in the Foundation's soil and site properties riskbuster, growers can then determine whether site modifications are needed.Davenport says this can include deep tilling or ripping, adding soil amendments, planting a cover crop, and using mulches or geotextile fabrics for weed control."Whether it's an established vineyard or a new one, it is important to have a soil surface management plan to address a number of issues," she said."In creating the plan, the grower identifies the needs of his or her specific site and ways of responding to those needs, whether it be decreasing weed pressure or increasing the organic matter in the soil."
  
  Davenport says cover crops are a popular tool in soil surface management in Eastern Washington.Many cover crops provide nitrogen and other nutrients; they out-compete weeds, prevent erosion, and are more aesthetically pleasing to some growers than bare soil.She warns that establishing a cover crop can be tricky in a vineyard using drip irrigation - and some cover crops harbor insect pests or disease organisms.County extension educators will aid growers in determining whether to plant a cover crop, and will make other recommendations for soil and water management.
  
  Because most Eastern Washington vineyards are irrigated from glacier meltwater pumped from rivers, Davenport says the water quality is good: low salts, low sediment levels and sufficient sulfur.Growers still should have their water tested, and then develop a water management plan that considers how much water to apply, how and when to apply it, and whether to monitor soil moisture.The Foundation's online riskbusters are excellent guides in developing water management plans.
  
  One common challenge for grape growers is the fine line between too much and not enough "water stress," according to Davenport.

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  www.ngwi.org/index.php?page_id=232 - [Cached Version]
  Last Visited: 7/6/2009  

  Dr. Joan Davenport, Washington State University, Dept. of Crop & Soil Sciences

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  www.wawgg.org/index.php?page_id=28&PHPSESSID=fac55c0cad - [Cached Version]
  Published on: 10/21/2008    Last Visited: 10/21/2008  

  Joan Davenport, Ph.D. 509-786-9394 Plant & Soil Nutrition jdavenp@wsu.edu

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  www.grapesociety.org/Meeting%20Proceedings/2007/2007ann - [Cached Version]
  Published on: 1/1/2007    Last Visited: 2/13/2009  

  Dr. Joan Davenport, Professor of Soil Science, WSU-IAREC, Pullman, WA
  
  Trellis Tension Monitor to Aid in Crop Estimation

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  www.grapesociety.org/Meeting%20Proceedings/2006/2006ann - [Cached Version]
  Published on: 11/1/2006    Last Visited: 2/13/2009  

  Dr. Joan Davenport, Associate Soil Scientist, WSU-IAREC, Prosser, WA
  
  Do You Know What Your Vine Needs? Part II.

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  www.dellchildrens.net/kids_health_from_az/health_news/2 - [Cached Version]
  Published on: 1/1/2008    Last Visited: 11/8/2008  

  Joan R. Davenport, a professor of soil science in the Department of Crop and Soil Sciences at Washington State University, thinks a lot more study needs to be done to figure out how these heavy metals are ending up in wine.
  
  "Knowing what I know about not only growing wine grapes but the whole process of turning them into wine and looking at some of the countries where these wines came from, it makes me wonder what may happen in the processing," Davenport said.
  
  A lot of the heavy metals found in the wines in the study, exist in only very small quantities in soil, Davenport said. "The likelihood of that being in the grapes isn't very likely," she said. The contamination could be coming from the metal barrels used in processing the wine, she added.
  
  Davenport isn't worried that these metals are a health problem. "I'm not going to drink any less wine," she said.

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  empowher.com/rss.xml - [Cached Version]
  Published on: 10/30/2008    Last Visited: 10/31/2008  

  One critic of the study does not think U.S. wines contain dangerous levels of heavy metals. "The U.S. [Alcohol and Tobacco] Tax and Trade Bureau routinely performs market basket surveys in the U.S. to test wine and alcohol for a number of components, including heavy metals," explained Gladys Horiuchi, communications manager at the Wine Institute of California. Joan R. Davenport, a professor of soil science in the Department of Crop and Soil Sciences at Washington State University, thinks a lot more study needs to be done to figure out how these heavy metals are ending up in wine. "Knowing what I know about not only growing wine grapes but the whole process of turning them into wine and looking at some of the countries where these wines came from, it makes me wonder what may happen in the processing," Davenport said. A lot of the heavy metals found in the wines in the study, exist in only very small quantities in soil, Davenport said.

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  www.agpowermag.com/articles/articles.php?articleid=2909 - [Cached Version]
  Last Visited: 6/27/2009  

  Professor Joan Davenport, a soil scientist at WSU's Irrigated Agriculture Research and Extension Center at Prosser, has developed a new course for the certificate program - Soils 20 1 - which will be offered for the first time this fall.

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