Handbook for Irrigation of Wine Grapes in South Africa

A

B

FIGURE 3.5. Examples of soils where heavy clay in the subsoil restricts grapevine root development near (A) Stellenbosch and (B) Wellington.

FIGURE 3.6. An example of a layered alluvial soil near De Doorns where layers of different texture will limit root distribution.

58 CHAPTER 3 – WATER RELATED SOIL PROPERTIES