Potato

Boron

Chlorosis an deformation of leaf margins. Hollow heart in tubers.

CALCIUM

Pale green to whitish spots and distorting of younger leaves and plant parts.

Iron

Yellow interveinal up to complete chlorosis on younger leaves first.

MAGNESIUM

Interveinal chlorosis on older leaves first.

MAGNESIUM

Interveinal necrotic dots occurring on young and all leaves.

NITROGEN

Pale green chlorosis on older leaves first.

PHOSPHORUS

Stunted, dark green plants. Rare purpling on older leaves.

POTASSIUM

Chlorosis and necrosis of leaf tips and margins on older leaves first.

SULPHUR

Uniform yellow up to white chlorosis on younger leaves first.

ZINC

Deformation of leaves and stunted growth.