Phosphorus deficiency

Growth stunted; leaves lustreless green and dull purple tints.

Potassium deficiency

Older leaves, marginal and intervenal brown scorch; they wither and collapse around plant.

Potassium deficiency

Field view. Older leaves severe marginal and intervenal scorch, followed by withering and collapse.

Boron deficiency

Death of foliage, beginning with crown leaves; rotting of roots.

Boron deficiency

Typical example of "Crown Rot"; petioles of young leaves show transverse cracking of epidermis on upper surfaces.

Boron deficiency

Small leaf condition on crown; leaves scorched and pigmented and death of tip of seed stem.