"I have professed this day": You recite (the bikkurim formula) once a year and not twice.
"that I have come to the land which the L-rd swore to our forefathers": excluding proselytes and slaves;
(Devarim 26:4) "And the Cohein shall take the basket from your hand": From here it was ruled: The rich bring (bikkurim) in baskets of silver and gold, and the poor, in wicker baskets of peeled willow, and the baskets are given to the Cohanim in order to favor the poor.