Which preposition to use with orchardists

by Occurrences 1%

These reflections have always led me to regard the birds and other interesting animals as having a value to mankind not to be estimated in dollars and cents, and which is entirely independent of any services they may render to the farmer or the orchardist by preventing the over-multiplication of noxious insects.

under Occurrences 1%

"] [Footnote 92: This process of propagation which Varro describes as "new" is still practised by curious orchardists under the name "inarching."

Which preposition to use with  orchardists