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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.
1 Nutrients are moved inside a plant to where they are most needed. 2  For example, a plant will try to supply more nutrients to its younger leaves than to its older ones. 3  When nutrients are mobile, symptoms of any deficiency become apparent first on the older leaves. 4  However, not all nutrients are equally mobile.arbon and oxygen are absorbed from the air, while other nutrients are absorbed from the soil. Green plants obtain their carbohydrate supply from the carbon dioxide in the air by the process of photosynthesis. Each of these nutrients is used in a different place for a different essential function.