Yellow Leaves On Silver Birch Tree

[foxhaven]

Some of the leaves [roughly 6 every day] are turning yellow then dropping, how do I know if this is a deficiency of iron or magnesium, the pictures are confusing.
Best remedy please ?

[Old_Geezer]

http://www.theanswerbank.co.uk/Home-and-Garden/Question1435224.html

[Chipchopper]

To start losing a few leaves at this time of the year seems natural, especially if the tree has experienced prolonged hot, dry periods with short, heavy bursts of infrequent rain.
A layer of well rotted leaf mould around the roots (which are very shallow) and will act as a mulch, keeping the roots cool and damp.
A few slow release fertilizer pellets wouldn't go a miss either, mix some in with the leaf-mulch.