Q.Identify and label the deficiency symptoms in the given diagram.

The printed shoot shows leaves with the classic hunger signs of this chapter - uniform yellowing (chlorosis), yellowing between green veins, dead brown patches (necrosis), scorched yellow margins, green-and-yellow mottling, a small deformed leaf and a dying shoot tip; each is matched to an element with Table 7.10. …

How to label the diagram.

1. Start from the healthy, evenly green leaf and compare every other leaf with it.
2. Uniform yellowing of an older, lower leaf - chlorosis; nitrogen (or magnesium) deficiency, because these mobile elements are withdrawn from old leaves first.
3. Yellow leaf with the veins still green, on a young leaf - interveinal chlorosis; iron deficiency (iron is immobile, so young leaves suffer first).
4. Brown or grey dead patches - necrosis; manganese deficiency gives grey spots, and severe potassium or magnesium deficiency also produces dead patches.
5. Yellow, scorched leaf margins - potassium deficiency (yellow edges to leaves, premature death).
6. Green and non-green patches - mottling.
7. Dull green or purplish leaf on a poorly grown shoot - phosphorus deficiency.
8. Small, malformed leaf - zinc deficiency (malformed leaves). …