Difference Testing of Merlot Produced from Biodynamically and Organically Grown Wine Grapes
CAROLYN F. ROSS, KAREN M. WELLER, ROBERT B. BLUE and JOHN P. REGANOLD
ABSTRACT The objective of this study was to determine if perceptible sensory differences existed
between biodynamically and organically grown Merlot wines. Wine grapes were raised
biodynamically or organically on a commercial vineyard with wines produced from 2001 to 2004.
Sensory difference testing was performed to evaluate possible differences between the two wines
within each vintage. Results of the triangle tests only showed a notable difference (p , 0.1)
between the 2004 biodynamically and organically grown wines. Results of the directional paired
difference test showed that the 2003 biodynamically grown wine was higher in musty/earthy
aroma (p , 0.05) and bitterness (p , 0.1). However, the 2003 organically grown wine was
preferred (p , 0.1). The 2004 organically grown wine was higher in musty/earthy aroma and
flavor (p , 0.05), astringency and bitterness (p , 0.1), and had a longer finish (p , 0.05)
compared to the same vintage biodynamically grown wine. Results indicate perceptible sensory
differences between the 2003 and 2004 biodynamically and organically grown wines.
Research publications concerning biodynamics