Iron and magnesium are essential for producing chlorophyll which would help plants to capture sunlight ☀️🌄 and convert it into food 🌱 🌺🍃 (carbohydrates, sugars and fats and in the regulation of nutrient absorption) for the plants to grown.
The symptoms of Iron (Fe) and Manganese (Mn) deficiency are quite similar.
Identifying the difference, when chlorosis symptom first appears on young growth and shots instead of the older leaves indicates Iron deficiency. 🌿🌳