Potassium deficiency on orange-Citrus

Symptoms
With potassium deficiency leaf margins of the older leaves turn pale yellow or sometimes bronze. With ongoing deficiency cholorosis spreads over the whole leaf.

Reasons
Potassium deficiency

Symptoms
Vertical splitting beginning at the blossom end and opening longitudinally towards the stem end.

Reasons
Potassium deficiency on fruit. Potassium nutrition influences fruit size, peel thickness and fruit color. Some fruit disorders are likely to occur under low potassium conditions or high N:K rations resulting in less marketable fruit: - smaller fruit - increased peel thickness - creasing - splitting

Symptoms
Fruit shows narrow sunken furrows on the rind surface. Therefore processing is more difficult as the peel disintegrates.

Reasons
Potassium deficiency. Creasing, the separation of the albedo from the outer peel, can be caused by a lack of potassium, calcium or boron.