Practical Winery
58-D Paul Drive, San Rafael, CA 94903-2054
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email: Office@practicalwinery.com
Winegrowing -

September/October 1999 

Tables for:
Evaluation of Cabernet Sauvignon: three vine spacings, two trellis systems; Oakville district, Napa Valley


By Don Williams and Richard Arnold,
Robert Mondavi Inc., Oakville, CA

Table 1: Vine spacing treatments
Treatment Name Vine spacing
(vine x row)
Trellis system Number vines/acre Area per vine
(sq.meters)
Close 1 x 1 meter Single VSP 3928 1.0
Moderate 1.0 x 1.8 m Single VSP 2178 1.8
Wide 1.5 x 2.7 m Single VSP 968 4.1
Lyre 1.5 x 2.7 m Lyre with VSP 968 4.1

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Table II: Average vine growth date (1992-1998)
Treatment Name Shoot #
per vine
Shoot weight
(g)
Pruning wt.
per vine (kg)
Pruning wt.
per meter
cordon (kg)
Pruning wt.
per meter 2
of soil
Close 8.7c 44.1 b .40c .40 .40
Moderate 11.7c 58.0 ab .69b .69 .38
Wide 16.6b 63.2 a 1.08a .72 .27
Lyre 26.4a 50.9 ab 1.35a .45 .33
(LSD, .05) 4.0 16.0 0.3    

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Table III: Leaf area measurements ( averages 1992-1995, 1998)
Treatment Name Node number
per main shoot
Main shoot leaf.
size (cm2)
Total leaf area
per shoot (m2)
Percent lateral
leaf area
Close 15.4 b 114.6 a .28 a 24.4 a
Moderate 18.5 a 129.7 a .32 a 18.6 a
Wide 18.7 a 127.4 a .34 a 17.5 a
Lyre 18.4 a 121.3 a .28 a 12.8a
(LSD, .05) 2.0 28.0 .10 15.0

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Table IV: Vine yield components (averages 1992 - 1998)
Treatment Name Cluster
number per vine
Cluster weight
(kg)
Berry weight
(g)
Number of
berries per
cluster
Crop weight
(kg/vine)
Calculated
tons per acre
Close 13.1 c .119c 1.07a 111 c 1.57d 6.8 a
Moderate 19.5 c .150 b 1.11 a 135 b 2.92 c 7.0 a
Wide 29.5 b .177 a 1.16 a 154 a 5.25 b 5.6 a
Lyre 42.7 a .154 b 1.17 a 132 b 6.56 a 7.0 a
(LSD, .05) 7.0 0.02 0.10 17.0 1.10 2.0

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Table V: Average canopy to crop ratios
Treatment Name Crop weight:
pruning weight
Leaf area:
crop weight
(cm2/g)
Close 4.1 a 15.2 a
Moderate 4.4 a 14.2 a
Wide 5.2 a 11.9 a
Lyre 5.1 a 11.6 a
(LSD, .05) 1.37 4.51

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Table VI: 110R and 5C rootstock comparisons of parameters exceeding
10 percent (All vine spacings and trellis systems average together)
Rootstock Cluster
weight (kg)
Crop weight to
pruning weight ratio
% lateral
leaf area
Leaf area to crop
weight ration (cm2/g)
110R .143 4.4 19.3 13.5
5C .157 5.0 17.3 12.0

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Table VII: Average analysis of last berry samples prior to harvest, 1992 - 1998
Treatment name Malic acid (g/l) Tartaric acid (g/l) Arginine (ppm)
Close 1.7 6.5 105
Moderate 1.8 6.5 105
Wide 1.7 6.7 101
Lyre 1.9 6.4 81

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Table VIII: Average wine analysis values, 1992-1998
Treatment Alcohol TA (g/l) pH K+ Total phenolics
(A280)
Color
intensity
Close 13.2 5.1 3.87 1490 55.7 8.9
Moderate 13.2 5.3 3.88 1507 56.6 9.03
Wide 13.4 5.3 3.81 1393 54.9 9.33
Lyre 13.4 5.1 3.89 1512 55.4 9.03

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