The Northern Grapes Project was funded in 2011 by the USDA NIFA Specialty Crops Research Initiative.  The emergence of cold hardy, Vitis riparia-based wine grape cultivars in the 1990s created a new and rapidly expanding industry of small vineyard and winery enterprises in more than 12 states in New England, northern New York, and the Upper Midwest, boosting rural economies in those regions.  Read more.

Read the September issue of News You Can Use

mark yan

In addition to sugars, adequate yeast assimilable nitrogen (YAN) concentration is required for successful alcoholic fermentation of grape musts. Unlike sugars, however, YAN is difficult to measure and impossible to estimate. YAN also varies widely by cultivar, year, climate, harvest date, and viticultural practices. Too little YAN can result in stuck fermentations or production of off-aromas, such as H2S, but too much YAN (which can happen, especially when prophylactic YAN additions are made) can lead to problems with spoilage organisms or production of fusel alcohols.

Click here for the full report, which includes a link to a webinar about YAN, a Northern Grapes Research Report outlining the YAN projects that have been conducted, as well as other good sources of information about YAN.

Read the August issue of Northern Grapes News

August 2015 page 1

In this Issue:
-Does Production Region Matter?
-NGP Team Profile: Mike White.
-NGP Team Profile: Paul Read.
-I Have Galls in my Vineyard: Should I Call my Nursery?
-Cold Climate Wine Quality Assurance Program. 

Click here to read the newsletter.


Read the Year 3 Northern Grapes Project Progress Report

Year 3 Northern Grapes Project Progress Report Page 1 photoThe Northern Grapes Project officially started in September 2011; we initially received two years of funding, and after a “gap year” in funds in Year 3 due to a delay in the farm bill, we were successful in our reapplication, and received two additional years of funds for September 2014 through September 2016. As Year 3 (the year included in this report) was a gap year in funds, the Northern Grapes Project was operating at a somewhat reduced capacity, but team members still moved forward with research and outreach with funds derived from other sources, such as state speciality crop block grants, or from the no-cost extension granted by the USDA. Vineyard studies continued as planned in most locations, despite the extreme low temperatures associated with the polar vortex in the winter of 2013/14 that caused extensive damage to vines in some locations. Winemaking trials were conducted as availability of fruit allowed. The marketing and economics team continued branding and consumer research. In the third year of the project alone, our extensive outreach efforts reached an estimated audience of 5,500 via numerous outlets, including the Northern Grapes Symposium, our capstone event of the year. The Northern Grapes Project Webinar Series, likely the most visible of the outreach products, had a live audience of approximately 600 at the 12 live sessions, and thousands of views of the recorded webinars.

Click here to read the full report.


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