Farming unions have said the planned changes will
have "disastrous" consequences.
Keir Starmer told the conference in Llandudno, Conwy, he
would defend the Budget "all day long" for taking "tough
decisions that were necessary to stabilize our economy".
Dozens of tractors and farm vehicles were parked on the prom
outside the conference at Venue Cymru.
Signs reading "Enough is enough" and "No
Farmers No Food" were held up as conference attendees entered the
building.
Conwy County farmer and broadcaster Gareth Wyn Jones said he
and others were taking part in the protest to "air their
frustrations".
He described the changes to inheritance tax rules as a
"massive bombshell" that would affect "thousands" of
farming families.
Meanwhile, one of the organizers Gareth Wyn Jones, a Welsh
farmer and YouTuber, told Sky News that farmers will deliver
Starmer a letter which starts "'don't bite the hand that feeds
you".
The UK premier was accused of “running out the backdoor like
a rat” to avoid scores of angry farmers outside the conference.