What is the role of iron in apple production?

Iron is required as a precursor to chlorophyll formation and in a number of important plant enzymes. Poor supply restricts photosynthesis and, as a result, reduces leaf growth and resultant fruit yield and quality.

Iron deficiencies in apples

Deficiency leads to characteristic chlorotic yellowing, and sometimes bleaching, of new leaf growth. In severe cases, leaves become scorched in summer months.

Problems are more common on high pH calcareous soils and often due to transient adverse weather, temporary waterlogging, or high copper levels in the soil.