Crop level effect on vine growth, fruit composition, and wine quality of Thompson Seedless grapevines, Davis, California. Data are the mean of six replicates (1969–1970).
| No. of clusters per vine | ||||
|---|---|---|---|---|
| Parameter | 20 | 40 | 60 | 80 |
| Crop wt (kg/vine) | 9.08 | 17.23 | 24.17 | 28.3 |
| Pruning wt (kg/vine) | 5.77 | 4.44 | 4.3 | 3.82 |
| Crop wt/pruning wt | 1.57 | 3.88 | 5.56 | 7.40 |
| Total leaf area/vine (m2) | 36.2 | 26.8 | 25.4 | 23.2 |
| Date fruit harvested | Aug 10 | Aug 20 | Aug 27 | Sept 4 |
| Total soluble solids (Brix) | 22.2 | 22.6 | 22.2 | 22.9 |
| Titratable acidity (g/100 mL) | 0.85 | 0.71 | 0.66 | 0.62 |
| pH | 3.27 | 3.49 | 3.44 | 3.49 |
| Brix/acid ratio | 26.1 | 31.8 | 33.6 | 36.9 |
| Leaf area/crop wt (m2/kg) | 3.99 | 1.55 | 1.05 | 0.82 |
| Wine-tasting score (20 points) | 12.38 | 13.0 | 12.85 | 13.06 |