On 10/21/05 9:22 AM, in article ,
"Boron Elgar" wrote:

snip


Boron

Your name reminded me. After years of using the same soil, it gets depleted.
If you merely replace the major minerals, nitrogen, phosphorous, and
potassium (NPK), some of the other essential minerals may be lacking. That
includes boron, which in excess can kill plants. Other elements,
particularly calcium and magnesium may get depleted at a good rate.

Bill