One who sells his field at a time that the Yovel is in force is not permitted to redeem [it] before two years, as it says: According to the crop-years shall he sell to you (Lev. 25:15). [If] it was a year of wind-blast, or yellowing, or [if it was] a Shemittah year, it is not included for him in the count. [If] he plowed it, or let it lie fallow, it is included for him in the count. R’ Elazar says: [If] he sold it to him before Rosh Hashanah, when it was full of produce, he may garner from it three crops in two years.