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Nutrient Disorder Management in Pigeon pea

Nitrogen > Potassium > Phosphorus >  Zinc > Calcium > Sulphur 

Nitrogen Deficiency

Symptoms
  • Young leaves uniformly become pale-green, greenish-yellow or pale yellow.
  • Old leaves show an inter-veinal chlorosis and only veins remain green, leaves soon shed.

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Potassium Deficiency

Symptoms
  • Leaf tips turn yellow or brown.
  • Yellowing spreads from the tip outward along the margin.
  • Leaf tip becomes scorched as symptoms become severe.
  • The affected leaves not showing these symptoms are generally dark-green.
  • Plants are stunted.

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Phosphorus Deficiency

Symptoms
  • Difficult to diagnose.
  • In general plants are stunted.
  • The foliage remains dark-green.
  • Shedding of old leaves.
  • Delays flowering.
 

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Zinc Deficiency

Symptoms
  • Stunted growth.
  • Narrowing of leaves with pale green or yellow.
  • Inter-veinal chlorosis starting from tip of leaflets and spreading to the remaining area leaving only the midrib green.
 Pigeon pea plant with severe zinc deficiency

Remedies
  • Deficiency can be corrected by application of materials containing Zn
  • Foliar application of zinc sulphate ( 0.5%+ 0.25% lime) is advised.
  • or Add 25 kg/ha zinc sulphate in coarse soils and 50 kg in fine textured once in two to three years.

Resources
  • Deficiency can be corrected by application of materials containing Zn
  • Foliar application of zinc sulphate ( 0.5%+ 0.25% lime) is advised.
  • or Add 25 kg/ha zinc sulphate in coarse soils and 50 kg in fine textured once in two to three years.

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Calcium Deficiency

Symptoms
  • Light-green patches, irregular in outline, appear randomly around the leaf margin.
  • Patches may turn brown, particularly on young and severely affected leaves; such leaves are shed.
  • Weak and prostrate stems.
  

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Sulphur Deficiency

Symptoms
  • Visible symptoms appear late before the commencement of flowering.
  • At the above stage old leaves turn yellow and nercotic.
  • Suppresses branching, leaf size and flowering.
  • Flowers lack normal pigmentation and abort prematurely.
  • Pod formation and development of seeds are retarded.

Remedies
  • Application of 20 kg/ha sulphur in coarse and 40 kg/ha in fine soils.

Resources
  • SULPHUR CONTENT OF VARIOUS FERTILIZERS:
     Ammonium sulphate 24% S.
     Single super phosphate 12% S
    Gypsum contains 13-18 % S.

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