Table grape rootstocks in South Africa

KEY (1) Block removed in 2002 (2) Trial terminated in 2010 (3) Trial terminated in 2001

Soil texture

Clay % Chemical content

Organic carbon content

pH

Clay loam

-

-

-

-

Clay loam

-

-

-

-

Clay loam Clay loam

- -

- -

- -

- -

Clay loam

-

-

-

-

Sandy loam

5% K and Ca levels low

Moderate to high Optimal

-

-

-

-

-

-

-

-

-

-

Sandy loam

17-25% K and Ca levels low

Low

-

Loam

7-9% K and Ca levels low, while Mg levels were high.

Low

Slightly higher than optimal (6.9)

Loam sand

11-23% Very high P levels, K and Mg levels lower than 7-11% Ca levels low and Mg levels high

Low

Moderately high (7.4)

Loam sand

Moderate to high Optimal (6.4)

Loam sand

9-11% K levels low

Moderate to high Slightly higher than optimal (6.9)

Table Grape Rootstocks in South Africa 51