Being in New England, I'm not familiar with the nutritional requirements
of tangerine vines.

Calcium availability is dependent on soil pH, with low pH decreasing the
availability, although organic soils are better at providing calcium
than mineral soils.

There should not be any real problem using calcium and nitrogen at the
same time. Calcium nitrate is used as a fertilizer. On the other hand,
an application of too much fertilizer could cause root injury which
would be reflected in the general plant health, not just in the fruit.

Are you sure that your fruit has a chemical injury or could it be some
other problem?



misato wrote:
It's my first time to send the message!

I'm looking for the reason why fruits got chemical injury .
I used nitrogen and calcium for soil to help raising the tangerine .
When nitrogen and calcium are used in same time or in a short periods,
is there any chemical injury?

Does anybody have any experience like this?
I'd really like to know how it was happend and what I can do for it.

Thank you .