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Calcium deficiency

Calcium Deficiency Symptoms
Emerging leaves appear scorched and distorted and may cup downwards because the leaf margins have failed to expand fully. Mature and older leaves are generally unaffected. With a severe deficiency, flowers can abort, and the growing point may die. Fruits from calcium-deficient plants are smaller and tasteless, and may fail to develop normally at the blossom end.
Correction measure
Application of gypsum / foliar spray of CaSo4 2%.
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Magnesium deficiency

Magnesium Deficiency Symptoms
Magnesium deficiency causes yellowing of older leaves. The symptom begins between the major veins, which retain a narrow green border. A light tan burn will develop in the yellow regions if the deficiency is severe. Fruit yields are reduced.
DOSAGE
Incorporate magnetite (300 kg/ha) or dolomite (800 kg/ha) into deficient soils before planting. Fortnightly foliar sprays of MgSO4 (2 kg/100 L) at high volume (500-1000 L/ha).
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Boron deficiency symptoms

Boron Deficiency Symptoms
Distortion of newer leaves (in severe cases the growing point dies) and the appearance of a broad yellow border at the margins of the oldest leaves. Young fruit can die or abort; abortion rates are high. Stunted development and mottled yellow longitudinal streaks, which develop into corky marking (scurfing) along the skin.
Correction Measure
Foliar spray of 0.2% Borax at forthrightly interval. Application of 10 kg borax per hectare to deficient soil before will prevent boron deficiency.
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Iron deficiency symptoms

Iron Deficiency Symptoms
ron deficiency causes a uniform pale green chlorosis of the newest leaves; all other leaves remain dark green. Initially, the veins remain green, which gives a net-like pattern. If the deficiency is severe, the minor veins also fade, and the leaves may eventually burn, especially if exposed to strong sunlight. Good drainage and soil aeration favour iron availability.
Correction Measure
Foliar spray of 0.5% FeSO4
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Manganese deficiency symptoms

Manganese Deficiency Symptoms
The veins of middle to upper leaves of manganese-deficient plants appear green against the mottled pale green to yellow of the blade.
Correction Measure
Spray the foliage with MnSO4 (100 g/100 L).
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Zinc deficiency symptoms

Zinc-deficiency-symptoms
Reduction in leaf size, shorting of internodes. Leaves pale green in colour and with green veins.
Correction Measure
Foliar application of 0.5% ZnSo4 Soil application of 5-10 kg ZnSo4 / ha.
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