Magnesium deficiency on lemon-Citrus

Symptoms
Magnesium deficiency causes interveinal yellowing on older leaves first. The leaf margins and leaf tips are most affected. Sometimes these areas become completely yellow, veins included. Chlorosis proceeds towards the petiole attachment point. Leaf base or a margin along the midrib remains green for the longest time. At prolonged deficiency younger leaves are affected too.

Reasons
Magnesium deficiency on leaves of Orange Iron deficiency causes interveinal chlorosis too, but starts on youngest leaves.

Symptoms
Magnesium deficiency causes interveinal yellowing on older leaves first. The leaf margins and leaf tips are most affected. Chlorosis proceeds towards the petiole attachment point. Leaf base or a margin along the midrib remains green for the longest time. At prolonged deficiency younger leaves are affected too. With ongoing deficiency the clorotic areas become completely yellow, veins included.

Reasons
Magnesium deficiency on leaves of satsuma Iron deficiency causes interveinal chlorosis too, but starts on youngest leaves.