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Absence or insufficiency of
phosphorus needed for normal growth and development. |
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| Deficiency symptoms of this element,
like nitrogen, are always found in the older plant leaves first. The
first symptom is a loss of sheen or shine of the older leaves (some
report this as a darker green colour). Next the area along the main
veins of the underside of these leaves tends to exhibit red, yellow
and bluish pigments. This colouration eventually spreads to other
portions of the leaves. The young leaves generally remain green but
are reduced in size. Phosphorus-deficient plants are stunted.
Maturity of the plant is often delayed. Root development is poor. |
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