Interestingly, the law only took effect fourteen years after the Jewish people entered the Promised Land. It took seven years to conquer and another seven to apportion the land amongst the twelve tribes of Israel. Only when that process was completed did the law of the first fruits become applicable.  

But why? Surely there were quite a few tribes who were settled earlier. No doubt, some of the farmers who had received their allotted land had planted and seen the first fruits of their labors. Why then were they not required to show their appreciation immediately by bringing the Bikkurim offering?