Chlorotic areas may develop throughout leaf. On sandy soils with excessive leaching. Specific deficiencies include browning of cauliflower, cracked stem of celery, blackheart of beet, and internal browning of turnip. On soils with a pH above 6.8 or on crops with a high boron requirement. Stem elongation is restricted by death of the growing point.
Root tips die and root growth is restricted.
Specific deficiencies include blossom-end rot of tomato, brownheart of escarole, celery blackheart, and carrot cavity spot. On acid soils, following leaching rains, on soils with very high potassium levels, or on very dry soils. Leaves yellow and may become elongated. Onion bulbs are soft, with thin, pale-yellow scales. On muck or peat soils.