Symptoms of Nutrient Deficiencies

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Plants usually display definite deficiencies if required nutrients are not present in adequate concentrations. The following symptoms may occur if the level of one mineral nutrient is not high enough to be within the range needed for best plant growth. A plant may exhibit a particular symptom for reasons other than a nutrient deficiency. However, if one of the deficiency symptoms occurs, a lack of the proper nutrient may be suspected, and the amount of that nutrient should be increased.

 

Deficient nutrient Symptoms
1. Primary Nutrients
Nitrogen Leaves are small and light green; lower leaves lighter than upper ones; not much leaf drop; weak stalks.
Phosphorus Dark-green foliage; lower leaves sometimes yellow between veins; purplish color on leaves or petioles.
Potassium Lower leaves may be mottled; dead areas near tips and margins of leaves; yellowing at leaf margins continuing toward center.
2. Secondary Nutrients
Calcium Tip of the shoot dies; tips of young leaves die; tips of leaves are hooked-shaped.
Magnesium Lower leaves are yellow between veins (veins remain green); leaf margins may curl up or down or leaves may pucker; leaves die in later stages.
Sulfur Tip of the shoot stays alive; light green upper leaves; leaf veins lighter than surrounding areas.
3. Micro Nutrients
Boron Tip of the shoot dies; stems and petioles are brittle.
Copper A number of visible symptoms of Cu deficiency have been observed on both mature and young leaves. Chlorosis, wilting and drooping of mature leaves may be the first visible symptom of Cu deficiency.
Iron Tip of the shoot stays alive; new upper leaves turn yellow between veins (large veins remain green); edges and tips of leaves may die.
Manganese Tip of the shoot stays alive; new upper leaves have dead spots over surface; leaf may appear netted because of small veins remaining green.
Molybdenum As Molybdenum is closely linked to nitrogen that, its deficiency can easily resemble nitrogen deficiency. Molybdenum is the only micronutrient that is mobile within the plant so deficiency symptoms show up on older and middle leaves, but it spreads up the stem and affects the new leaves.
Zinc Affects the metabolic processes of rice plants

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