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Naturally occurring substance, primarily as rock salt (NaCl = sodium chloride) in the soil and as table salt in sea waters (2.7%). Vines are relatively susceptible to salt damage compared to other cultivated plants. In the soil, salt has a negative effect on growth by impairing the water balance, especially in higher concentrations in the root zone. This can cause chlorosis and necrosis. This can be combated by adding calcium (gypsum) or with heavy artificial irrigation to leach out the salt.

Irrigation with excessively salty water leads to burns on the leaves, which can also be caused by sea salt winds near the coast. Salty soils are particularly common in areas with hot, dry climates and artificial irrigation. Some areas in Australia are affected. Most grape varieties are sensitive to salt, with Colombard being one of the few relatively resistant varieties.

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