Production

Information on wine production, including resources and tips for home production of wine and beer, basics on wine acidity and tannins, enological additives and managing sour rot. Tips on preparation for harvest and sulfur dioxide management.

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Photo: Molly Kelly, Penn State
Incorporating Microbiology Techniques in the Winery - Articles Articles
There are a number of spoilage microorganisms and yeasts that we are concerned with as winemakers. More
Photo by Michela Centinari
Penn State Grape and Wine Team Boosts Industry Through Research, Education - News News
The Penn State Grape and Wine Team is supporting the blooming grape and wine industry. More
Wine Tannins Unwrapped Via Clark Smith
Wine Tannins Unwrapped Via Clark Smith - Articles Articles
International wine expert, Clark Smith noted that wine tannins are often confusing to winemakers, and gave a brief overview to explain some grape and wine tannin basics. More
Wine Analytical Labs: How Your Winery Can Use Them
Wine Analytical Labs: How Your Winery Can Use Them - Articles Articles
An important attribute to winemaking is monitoring quality control of the wines through quantitative analysis. More
Why Measure YAN? Variation in YAN Data Over a 6 Year Time Period
Why Measure YAN? Variation in YAN Data Over a 6 Year Time Period - Articles Articles
YAN data from the same vineyard site was collected from 2006 to 2011 to emphasize vintage variation in YAN and a need for annual YAN testing. More
Volatile Acidity in Wine
Volatile Acidity in Wine - Articles Articles

Volatile Acidity in Wine

Denise M. Gardner

Volatile acidity (VA) is a measure of the wine’s gaseous acids that contributes to the smell and taste of vinegar in wine. More
Tasting Room Employee Sensory Training
Tasting Room Employee Sensory Training - Articles Articles

Tasting Room Employee Sensory Training

Michela Centinari, Ph.D.

Understanding wine sensory evaluation to better adapt to consumer preferences aids in producing wines that will be sold successfully in the wine market. More
Sulfur-based Off-flavors in Wine
Sulfur-based Off-flavors in Wine - Articles Articles
This article explains sulfur, sulfur dioxide, and sulfur-like off-odors in wine, and how to remediate hydrogen sulfide in wine. More
Sulfur Dioxide Management
Sulfur Dioxide Management - Articles Articles

Sulfur Dioxide Management

Denise M. Gardner

This article explains how and why sulfur dioxide is used as the primary preservative in wine. More
Resources for Home Production of Wine, Beer, and Growing Grapes
Resources for Home Production of Wine, Beer, and Growing Grapes - Articles Articles
Looking to make your own wine? Brew your own beer? Or grow your own grapes? Below is a list of resources useful for all of your home production needs. More
Starting a Lab in a Small Commercial Winery
Starting a Lab in a Small Commercial Winery - Articles Articles
The following is a guide meant to help establish a wine lab in a small (<10,000 cases annual production) to mid-size (<30,000 cases) winery. More
Carboys are filled to minimize oxygen exposure during storage. Keeping the carboys in a cool area also helps maintain freshness. Photo by Denise M. Gardner
Production Tips for the Home Winemaker - Articles Articles
The following article discusses some possible considerations when making wine at home. More
Preparation for Harvest
Preparation for Harvest - Articles Articles

Preparation for Harvest

Denise M. Gardner

A series of tasks are required for harvest preparation: ordering supplies, checking equipment, preparing the enology lab, updating SOP's, assessing safety risks, and visiting the vineyard. More
Nutrient Management during Fermentation
Nutrient Management during Fermentation - Articles Articles
This article explains what YAN is, the advantages of measuring and treating it, and how to determine what your YAN value means, among other YAN-related topics. More
Managing Sour Rotted Fruit in the Cellar
Managing Sour Rotted Fruit in the Cellar - Articles Articles
Like many grape diseases, sour rot is not specific to one genus and species of bacteria, and it’s difficult for winemakers to know how to deal with such infections. More
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