Ace the Kansas Turf Pest Control 3B Test 2026 – Master Your Green Thumb Skills!

Iron chlorosis shows up as yellowing of leaf tissue between the veins while the veins stay green. This happens because iron is essential for chlorophyll production, and in high-pH soils iron becomes less available, so new growth can’t form chlorophyll properly. The result is interveinal chlorosis—leaves appear yellow with green veins, which is exactly what the option describes. The other signs—blue leaves, leaves with black spots, or leaves curling upward—point to different problems like mineral imbalance, disease, or abiotic stress, not iron chlorosis.