Element |
Deficiency |
Excess |
Nitrogen |
Stunted growth,
pole green foliage, oldest
leaves turn
yellow and abscise. Some crops show a reddish color
instead of pale green. |
Heavy bushy
and/or elongated growth large and many
- dark green leaves, few flowers and fruits. |
Phosphorus |
Dwarfed plants:
thin shoots or stems, small leaves, dull
purplish color of whole plant, early defoliation. |
Slender stems,
shoots or leaves green leaves with
marginal browning of oldest leaves which con extend into
the leaves forward curling of the leaves.
|
Potassium |
Seldom
occurring may result in nitrogen, potassium
or
zinc deficiency. |
Expressed in
most cases as
magnesium deficiency |
Calcium |
Yellow
terminals with oldest leaves remaining green
stunted growth, die-bock of apical bud, abnormal growth
of young shoots followed by die-bock, pitted stems and
stubby roots with block spots. |
Expressed as
deficiency of other elements like potassium, magnesium,
iron,
manganese or
boron. |
Magnesium |
Interveinal chlorosis (yellow first, then
brown) of oldest leaves, leaf margins at the beginning
green but becoming chlorotic (yellow) withering of
older leaves. |
Poor restricted
growth. |
Iron |
Net like interveinal chlorosis, followed by
browning of
leaves on young growth. |
Dark green
foliage turning sometimes into
manganese or
zinc deficiency. |
Manganese |
Fish-bone like
appearance of veins with interveinal chlorosis on leaves near the tip of the
plant. Leaf curl and complete yellowing of leaves. |
Like deficiency
symptoms but with dork brownish spots on
leaves. Sometimes like iron deficiency. |
Boron |
Stunted growth,
die-bock of terminal growth or apical buds
of plant similar to calcium deficiency
symptoms but without the abnormal growth of the young
shoots. |
Appears similar
to boron deficiency with deformed young
leaves and terminal bud die-bock. |