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credits are due for help I have received:

to those who have proof read this and made suggestions
  (My brother Charles helping with topics and presentation)
to my customers who have put up with my experiments
  (some have done this for decades)
to the professionals I have worked with who have shared their knowledge
    Gary Kohler - landscape designer
    Ron Polits - lawn and tree consultant (Lawnwood Tree)
to my workers who have been sounding boards for my procedures
    (several have gone off to start their own businesses)
to my photographer (the best pictures are his) my son James
to web-design consultant Nancy who helps me fix some glaring errors
   (layout and content mistakes are mine) who also has organic lawn care in Newton