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Primary nutrients Nitrogen deficiency results in very stunted, spindly yellow plants or yellow leaves, sometimes with pink tints. There is a general yellowing of older leaves (bottom of plant). The rest of the plant is often light green. There are elongated twisted leaves on cauliflowers or other brassicas (cabbage family) growing in alkaline soil. Molybdenum deficiency is normally seen in cauliflowers and brassicas, particularly when growing in insufficiently alkaline soil.
Nitrogen. Deficiency symptoms are seen first on older leaves. Deficient leaves are lighter green, smaller, may show earlier fall color or more intense fall color, and may also drop earlier. Shoots and branches will be shorter and may also be fewer in number. Phosphorus. Deficiency symptoms are first seen on older foliage.