Handbook for Irrigation of Wine Grapes in South Africa
Figure 7.18
Chapter 7
100 120 140 160 180 200
A
FC
PWP (80)
0 20 40 60 80
Soil water content (mm/60 cm) Sep Oct
Nov
Dec
Jan
Feb Mar
100 120 140 160 180 200
B
FC
0 20 40 60 80
PWP (90)
Soil water content (mm/60 cm) Sep Oct
Nov
Dec
Jan
Feb Mar
FIGURE 7.18. Seasonal soil water content where Shiraz/110 R in a fine sandy loam soil was drip irrigated (A) at 75% PAW depletion followed by DI during ripening and (B) at 90% PAW depletion followed by DI during ripening in the 2008/09 season near Robertson in the Breede River valley (Lategan, 2011). Dashed lines indicate field capacity, permanent wilting point and PAW depletion level.
IRRIGATION OF WINE GRAPES 205
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