ISA BCMA Practice Questions - ISA Board Certified Master Arborist (BCMA) Exam

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A mature oak shows interveinal chlorosis on the youngest leaves while the veins remain green, and a soil test reveals a pH of 8.1 on a calcareous urban fill. Which abiotic disorder is the most likely cause?

Nitrogen deficiency with uniform yellowing of older leaves first Iron (Fe) deficiency induced by high soil pH Potassium deficiency with marginal scorch on older foliage Magnesium deficiency with interveinal chlorosis on older leaves

Correct Answer:

Iron (Fe) deficiency induced by high soil pH

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