go and find an attorney that has a lot of dealing in ag law.
they should be able to advise you in the best approach.
do keep in mind from what i have read the taxation will depend on your intent ie that you do intend to keep on farming it and can demostrate this by all that you have put into it.
for that matter you might be able to claim some of the land for compensation for all you have put into it.
but once again check local laws.
this is from a pennsylvania newspaper..
inheritance-tax relief for farm families. It exempts half the value of farms that have agricultural easement.
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Pennsylvania's inheritance tax rate is 4.5 percent for the deceased's children, grandchildren or parents; 12 percent for siblings and 15 percent for other heirs. Spouses and charitable organizations are not charged inheritance
if say you have kids but they are not interested in farming you might want to explore putting some of the land in charitable trust even a land perserve type thing that will still allow you to farm it .
this might give you a legit tax break.
this might be of interest..
https://revenue-pa.custhelp.com/cgi-bin/revenue_pa.cfg/php/enduser/std_adp.php?p_faqid=711&p_created=1044282785&p_sid=2wlffzGi&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PWRmbHQmcF9ncmlkc29ydD0mcF9yb3dfY250PTI0JnBfcHJvZHM9JnBfY2F0cz0wJnBfcHY9JnBfY3Y9JnBfc2VhcmNoX3R5cGU9YW5zd2Vycy5zZWFyY2hfbmwmcF9wYWdlPTEmcF9zZWFyY2hfdGV4dD1mYXJt&p_li=&p_topview=1
from pennsylvania dept revenue..
Realty transfer tax on family limited partnership