<table border=0 cellpadding=2 cellspacing="0"><tr><td>
<pre>As you probably know Rio Tinto is the world's largest producer of Boron and
I found an interesting piece in their magazine (June 96) about the
application of Boron in Spain. There the problem is one of availablity as
the soils are calcareous.
Symptoms:- "When they discolour their leaves at the tips, when they shed
them prematurely, when they kill off branches by die back, when they
produce a multitude of barren suckers, when such fruit as are fertilised
become deformed or corky, then fall to the ground unusable." They go on to
say that the application of 20 to 30 gm of borate fertiliser per tree can
double or triple yields.

Rio Tinto is a part Oz company - perhaps they can provide more advice.

Cheers Brian Chatterton.
</pre>
</td></tr></table>