Kommentar zu Wajikra 27:24

לאשר קנהו מאתו for the one who has bought it cannot in turn sanctify it except for the crops grown on it between then and the advent of the next Jubilee year.

לאשר קנהו אתו, “to the one of whom it had been purchased.” This purchaser had never been in a legal position that enabled him to sanctify the soil of that field. He could only sanctify the fruit that it produced while it had been in his possession. (B’chor shor)