Article Index
Foliar Nutrition
Reasons for deficiency
Plant Nutrients
Requirements & signs of deficiencies
Symptoms of nutrient deficiencies
Trace element deficiency table
Influence of the least nutrient
The influence of pH
The effect of pH
Absorbition of nutrients IONS
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Key to the Classical symptoms of nutrient deficiencies

  Deficiency Symptoms Deficient Nutrient
( I ) The dominant symptom is chlorotic foliage
(1) Entire leaf blades are chlorotic
(1,1) Only the lower leaves are chlorotic followed by necrosis and leaf drop
(1,2) Leaves on all parts of the plant are affected and sometimes have a beige case
(2) Yellowing of leaves takes form of interveinal chlorosis
(2,1) Only recently mature or older leaves exhibit interveinal chlorosis
(2,2) Only younger leaves exhibit interveinal chlorosis. This is the only symptom
(A) In addition to interveinal chlorosis on young leaves, grey or tan necrotic spots develop in chlorotic areas
(B) While younger leaves have interveinal chlorosis, the tips and lobes of leaves remain green followed by veinal chlorosis and rapid, extensive necrosis of leaf blade
(C) Young leaves are very small and sometimes missing leaf blades altogether and internodes are short giving a rosette appearance
( II ) Leaf chlorosis is not the dominant symptom.
(1) Symptoms appear at the base of the plant
(1,1) At first, all leaves are dark green and then growth is stunted. Purple pigment often develops in leaves, particularly older leaves
(1,2) Margins of older leaves become chlorotic and then burn, or small chlorotic spots progressing to necrosis appear scattered on leaf blades
(2) Symptoms appear at top of plant
(2,1) Terminal buds die giving rise to a witch's broom. Young leaves become very thick and leathery
and chlorotic. Rust-coloured cracks and corking occur on young stems, petioles and flower stalks. Young leaves crinkled
(2,2) Margins of young leaves fail to form, sometimes yielding strap-leaves. Growing point ceases to develop, leaving a blunt end. Light green colour or uneven chlorosis of young tissue. Root growth is poor in that roots are short and thickened


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