Greetings,
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Please visit the link below and browse down for the shloka. According to the information given here there are  eight trees upon its plantation in eight directions; improves the fertility of the fields/farm.
It is Marthi newspaper "LOKSATTA", have written down the names; for your immediate reference,
at East        : Banyan (वड)
North                           : Chilla (पिंपरी )
North east(Ishanya)   :      silk cotton tree        (काटे सावर )
West                           : Ficus religiosa Linn.( पिंपळ )
North west(Wayavya) :       Neem          (कडूलिंब )
South                        :Ficus hispida ( उंबर)
South east (Agneya) : Garlic pear tree, Caper tree,(वरूण  )
South west (Nairutya) : Indian Cherry  (à¤à¥‹à¤•र )
E&OE
Courtsey: search engine, while confirming the english/commmon names for the above;Â came across this PDF file-book; since it was not found in the list compiled by Shri J M Gargji; have added the link below:
name of file: COMMON TREES, Dr. H. Santapau,INTRODUCTION
Sorry for the inconveniences,
Thanks with Regards,
Â
geeta rane