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Re: Greensand & other rock dusts

Just a note of thanks to Chris Alenson for a lovely and lucid 
explanation of the use of rock dusts for mineral nutrition.  Hats off 
to you - may I print out and use your message in my Crop Ecology 
course?  Ann

Dr. E. Ann Clark
Associate Professor
Crop Science
University of Guelph
Guelph, ON  N1G 2W1
Phone:  519-824-4120 Ext. 2508
FAX:  519 763-8933