Berries
In practice, small fruits are well fertilized and the incidence of nutrient deficiencies, such as S, are not common. However, because of high fertilizer rates the problem of salt and Cl toxicity does arise. Small fruits can be classified for salt and Cl tolerance as follows (Zehler et al., 1981):

• Fairly sensitive: Blackcurrant and strawberry
• Very sensitive: Blackberry and blueberry
• Extremely sensitive: Redcurrant and raspberry

Fruits, such as the redcurrant and raspberry, show typical marginal leaf scorch at quite low Cl levels. Research in Europe (Zehler et al., 1981) suggests that these crops be fertilized exclusively with SOP.