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Effect Of Deficiency Of Nitrogen And Potassium Or Health Of Certain Fruits And Field Corps




  • NITROGEN Def. Yellowing of leaves.

    POTASSIUM Def. Necrosis of stem and fruits.

    MAIZE: 

    NITROGEN Def. Yellowing of tips progressing along midrib & leaf become brown.

    POTASSIUM Def: Brown edge scorching leaves

    COTTON:

    NITROGEN: Def. Yellow color of foliage and slow growth.

    Mag Def. Purplish red color with green veins.

    POTATO:

    NITROGEN Def. Distinct loss of chlorophyll at leaf margins with light green color in the center.

    POTASSIUM Def. Bronzing and yellowing of leaves with dead edges.

    Crop

    Nutrients

    Deficiency Symptoms

    A Field Crops

    1. Wheat

    Nitrogen

    Leaves pale green, less tillering, shoots dwarfed.

    Phosphorous

    Leaves bluish green with purplish, less tillering.

    Calcium

    Plants stunted, with high mortality of seedlings. Leaf tips chlorotic and die back.

    Magnesium

    Older leaves much yellow and show dying off, the younger leaves, generally slightly pale green, later turning brownish.

    Potassium

    Internodes short, leaves slightly chlorite, bluish green, tips generally scorched.

    2. Maize

    Manganese

    Leaves with intervenial white streaks.

    Nitrogen

    Leaves pale green, stems and leaves show red tint.

    Phosphorous

    Stem and leaves with purplish tine, leaves pale green.

    Potassium

    Internodes short, leaf margins brown and scorched.

    3. Brassica

    Nitrogen

    Leaves pale green older leaves with reddish to purplish tints, leaves defoliate early.

    Phosphorous

    Leaves with dull appearance.

    Calcium

    Chlorotic young leaves, leaf tips brown and margins scorched.

    Potassium

    Leaves dark green, curling backwards, scorching of the leaf margins.

    4. Sugar beet

    Nitrogen

    Leaves pale green, plants with stunted growth.

    Phosphorous

    Leaves dull green, plants with stunted growth.

    Calcium

    Marginal scorching of older leaves and death of the growing points.

    Magnesium

    Chlorosis near leaf margins and on tips, later necrosis develops.

    Manganese

    Older leaves get wilted and scorched, also puckering of leaves.

    B. Vegetable Crops

    1. Potato

    Nitrogen

    Leaves pale green, plants with stunted growth, older leaves turn yellow and defoliate early.

    Phosphorous

    Leaves dull green, with scorched margins.

    Potassium

    Internodes short, leaves curl backward, near the margins, Leaves bluish green with bronzed appearance and scorched margins.

    2. Beans

    Nitrogen

    Growth retarded, leaves small pale green early defoliation

    Phosphorous

    Stem dwarfed and thin, early defoliation, leaves show bronzing

    Calcium

    Growth stunted, young leaves distorted, growing points die out.

    Magnesium

    Older leaves slightly pale with intervenial Chlorosis.

    Potassium

    Short internodes, leaf margins scorched.

    3.Peas

    Phosphorus

    Leaves becoming dull green, less flowering, growth stunted.

    Calcium

    Growth restricted, leaves with intervenial Chlorosis, wilting or older leaves.

    Potassium

    Internodes short, growth retarded.

    Boron

    Growth stunted and stems brittle. Larger leaves with intervenial Chlorosis.

    4. Carrot

    Nitrogen

    Plant’s growth stunted. Leaves pale green. Reddish tinge developing on older leaves.

    Phosphorous

    Foliage showing purplish tinge. Plant growth rather restricted.

    Magnesium

    Prominent Chlorosis for older leaves.

    Potassium

    Scorching of tips of older leaves, later becoming brownish and die off.



    Boron

    Plants assuming bushy appearance. Young leaves distorted, showing some signs of chlorosis.

    5. Onion

    Nitrogen

    Growth stunted, foliage pale. Leaves die back from tips.

    Phosphorous

    Foliage showing dull green appearance, growth retarded.

    Potassium

    Chlorosis of leaf tips, leaves dull green and die back from tips.

    Phosphorous

    Plants dwarfed, leaves small, bluish green developing purplish tinge.

    7. Pepper

    Nitrogen

    Stunted plant growth, leaves small, yellow, and fruits yellow green.

    Phosphorous

    Restricted growth. Fruit small and leaves yellowish.

    Potassium

    Small necrotic lesions along the vein of bronzed leaves.

    Calcium

    Stunted growth, leaves dark green. Fruit small and darker green.

    8. Lettuce

    Nitrogen

    Leaves pale green, older leaves yellow and get withered.

    Potassium

    Restricted growth, leaves dark green. In case of severed deficiency, yellow spots develop near the tips of older leaves.

    Phosphorous

    Plants stunted, dull and dark green, reddish purple tinge on the leaves.

    Magnesium

    Yellowish margins of older leaves, later become scorched.

    9. Cucumber

    Nitrogen

    Restricted plant growth. Stem thin with yellowish leaves; fruits pale and of poor quality.

    Phosphorous

    Younger leaves small and dark grayish green. Both veins and intervenial areas becoming brownish.

    Potassium

    Marginal chlorosis and browning of leaves, later spreading interveinally. Leaf margins turn brown and later dry out.

    Magnesium

    Chlorosis and intervenial yellowing of fruit.


    Calcium

    Yellowing of leaves. Plants show stunting, roots poorly developed, thicker and shorter.

    Sulphur

    Upper leaf surface pale green, yellow, showing chlorosis.

    Iron

    Yellowish green younger leaves. Plants short.

    Manganese

    Intervenial chlorosis, veins remaining green. Growth retarded.

    C: Fodder crops

    Clover

    Potassium

    Brownish to whitish spots near leaf margins, later scorching of leaf margins, leaves also show some signs of Chlorosis.

    Phosphorous

    Leaves dull green. Plants with less foliage. Purplish or bronzed spots on leaf surface.

    Calcium

    Growth restricted, young shoots with and die off. Leaf margins become brown to reddish brown.

    Magnesium

    Yellowing of older leaves. Leaf margins become brown to reddish brown.

    D: Fruit plants

    1-Apple

    Phosphorous

    Leaves small, dull green with purple to bronzed tint (tinge).

    Potassium

    Stunted growth leaves bluish green, slightly chlorotic. L margins scorched.

    Magnesium

    Leaves with intervenial chlorosis, especially near margins.

    Nitrogen

    Leaves smaller, pale green, leaves fall early. Fruit small.

    Calcium

    Leaf margins scorched, curling upward.

    2. Strawberry

    Phosphorous

    Leaves dull green. Older leaves fall early.

    Manganese

    Chlorosis of margins.

    Magnesium

    Yellowing of older leaves.

    Iron

    Leaves chlorotic.

    E-Flowering Plants

    1. Poinsettia

    Nitrogen

    Leaves pale green and then yellow. Plant growth short, with reddish petiole.


    Phosphorous

    Older leaves yellow. Upper leaves darker green and lower leaves yellowish. Delayed flowering.

    Potassium

    Lower leaves show yellowing of the margins. Veins dark green. Leaf margins later turn brown.

    Calcium

    Leaves become dark green with a reddish tint and tend to with. Leaves get defoliated. Internodes short.

    Magnesium

    Stunting of plants, interveinal chlorosis of lower leaves. Necrotic spots developed along the margins.

    2. Chrysanthemum

    Nitrogen

    Leaves becoming pale green. Older leaves become yellow, then brown and die prematurely. Retarded plant growth.

    Phosphorous

    Plants dull green. Older leaves yellow and then brownish. Purplish red pigments also develop on leaves.

    Potassium

    Browning of leaf margins and death of lower leaves. Curling of leaf margins downward and inward. Growth rate slows, with poor root system.

    Calcium

    Initially slight loss in color and later development of brown spots on upper leaves, enlarging rapidly, afterwards distortion.

    Magnesium

    Leaves become pale green, and then usually interveinal yellowing. Symptoms are prominent on young leaves. Growth is ceased.

    Copper

    Dull green leaves, yellowing of veins, spreading toward margins.

    Zinc

    Small yellow spots on middle and upper leaves. On enlarging become brown.

    Boron

    Pale upper leaves with short internodes. Interveinal yellowing and downward curling.

    3. Carnation

    Nitrogen

    Older leaves turning yellow, necrosis of tips.

    Phosphorous

    Reduced growth. Stunted plants with narrow leaves.

    Potassium

    Yellowish necrotic spots on upper and middle leaves. Affected regions become dried and shriveled. Slender and short stem with narrow leaves.

    Calcium

    Plants pale green, tip burn of leaves. Necrotic spots on stem and also on leaves.

    Magnesium

    Chlorosis of middle leaves, developing upward and downward. Leaves becoming yellow with light green veins.

    Copper

    Stem becomes thin and weak.

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