Late Night Mishmar With Rabbi Reisman: Fruit During Shemita - Does The Torah Make It Hefker Automatically Or Is There A Mitzva For The Owner To Be Mafkir It?

From HaRav Yisroel Reisman by R Yisroel Reisman.

Late Night Mishmar With Rabbi Reisman: Fruit During Shemita - Does The Torah Make It Hefker Automatically Or Is There A Mitzva For The Owner To Be Mafkir It?