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Sour soil (Säureschäden)
Tom Zabadal , MSU Horticulture
Home > Scouting guide> sour soil
When varieties of Vitis vinifera L. are grown on highly acidic soils (pH of 4.5 or less), the margins of basal leaves may become yellow and then speckled with brown areas. The low soil pH level associated with these symptoms results in low levels of calcium, magnesium and phosphorus in vines and high levels of potassium, aluminum and manganese. This condition may cause poor fruit and shoot maturity.
Sour soil
Säureschäden on the basal leaves of White Riesling vines.
Photo: T. Zabadal

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Funding for this web site provided by Project GREEEN, American Farmland Trust, EPA Region 5's Strategic Agricultural Initiative program, The National Foundation for IPM Education, the Center for Agricultural Partnerships and the MSU Integrated Pest Management Program
in collaboration with MSU Extension and the Michigan Agricultural Experiment Station.
Updated 12/11/07 Contact: J.N. Landis.