Dwelling in the Land of Israel

Question: Is the fulfillment of the mitzvah of dwelling in the Land of Israel similar to the mitzvah of wearing Tzitzit and every second one lives in Israel, one is fulfilling a mitzvah?
Answer: Yes. It is similar to fulfilling the mitzvah of dwelling in a Sukkah. One begins fulfilling a positive mitzvah upon entering. There is a difference between one who is fulfilling a mitzvah and one who is engaged in a mitzvah: if one is engaged in a mitzvah (as opposed to simply fulfilling it) he is exempt from performing another mitzvah.