Most common in poorly drained soils, also where organic matter levels are high.
Affected plants include onion, apple, peas, French beans, cherry and raspberry, and symptoms include yellowing of leaves with smallest leaf veins remaining green to produce a ‘chequered’ effect.
The difference between these two is that the younger leaves near the top of the plant show symptoms first because manganese is not mobile while in magnesium deficiency show symptoms in older leaves near the bottom of the plant.
[2] Manganese deficiency is easy to cure and homeowners have several options when treating these symptoms.
Two materials commonly used for lowering the soil pH are ammonium sulfate and sulfur.