Bearing in mind the previous answer, what if the owner wants to redeem the field one and a half years before or after the Yovel?
Erchin, 25a: "ha'Shanim ha'Nasaros" implies that the Kohen only count years, and not months. Consequently, the owner will have to pay the full fifty Sela'im. Nevertheless, based on the words "Ve'chishav Lo ha'Kohen", implying at all costs - the Kohen has the right to consider the one and a half years as two years and to charge him accordingly. 1
See Torah Temimah, note 97.
Why does the Torah insert the double Lashon "Ga'ol Yig'al"
Erchin, 30b: To teach us that the owner is permitted to borrow money 1 in order to redeem the field, or to redeem it halves.
Sifra: To incorporate a woman and an heir in the current ruling.
As opposed to someone who redeems the field that he sold in the time of the Yovel. See Torah Temimah, mote 102.
Why does the Torah insert the (otherwise superfluous) words "es ha'Sadeh"?
Erchin, 25a: To permit the owner to redeem a Lesech (half a Kur), half a Lesech, a Sa'ah or even three or two Kabin. 1
See Torah Temimah, notes 1105 & 106.
Why does the Torah insert the (otherwise superfluous) word "Veyasaf Chamishis Kesef Erk'cha alav"?
Kidushin, 5a: To teach us that one can only redeem Hekdesh and Ma'aser Sheini with money and not with a Sh'tar 1 (or with Karka, 2 and "Alav" teaches us that the same applies to the extra fifth that the owner pays when re deeming his Hekdesh and Ma'aser Sheini - Bava Metzi'a, 54a).
Kidushin, 11b: Despite the fact that throughout the Torah, "Kesef" in the current sense means Kesef Tzuri 3 ('silver'), regarding Hekdesh, we learn from Ma'aser Sheini 4 that it means 'money'. Consequently, if someone redeemed Hekdesh worth a Manah on a P'rutah (which is a copper-coin), his Hekdesh is valid.
See Torah Temimah, citing Kidushin, Ibid. which does not cite the current Pasuk, and see note 107, where he elaborates.
Consequently, if Hekdesh has been redeemed with Karka (or with a Sh?tar) one cannot Bensch Mezuman on it (B?rachos 47b); clear it out of a storehouse on Shabbos (Shabbos 128a) ? See Torah Temimah note 114; - use it to make an Eruv (Eruvin 31b) - See Torah Temimah note 115 or bring it as a Korban Pesach (Pesachim 35b).
See Torah Temimah, note 109.
See Torah Temimah, note 110.
Why does the Torah add the words "ve'Kam lo"?
Rashi (in Chulin, 83a): To teach us that, min ha'Torah, money acquires - Hekdesh and all Metaltelim. 1
Meshech Chochmah: To teach us that the field returns to its original status of a S'dei Achuzah, and if he sells it, it returns to him in the Yovel. 2
Ha'amek Davar: To teach us that the field is elevated, since it was once Kadosh, and that consequently, even though it has been redeemed, if one grows grain in it, it is appropriate to sell the grain for Menachos.
Kidushin 5a: It teaches us that one cannot acquire Hekdesh with a Sh?tar. 3
