Citrus and Subtropical Crops
Mineral Nutrition Disorders

Potassium deficiency

Potassium deficiency

Potassium deficiency in citrus is shown here in the fruit. The normal fruit are on the top row, and the deficient fruit are on the bottom row and are smaller. Citrus leaves would have shown blotches of pale yellow at first but deepening to bronze as they spread and coalesce; leaf tips turn brown; old leaves persistent (in contrast to Ca deficiency); foliage would be drab.

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This site is maintained by Dr. Laurence Sistrunk, Dept. of Hort. Sci., Texas A&M University