C. F. Keil and Franz Delitzsch on Leviticus 27:16-25

Lev 27:16-25

With regard to the vowing of land, a difference was made between a field inherited and one that had been purchased. Lev 27:16

If any one sanctified to the Lord “of the field of his possession,” i.e., a portion of his hereditary property, the valuation was to be made according to the measure of the seed sown; and an omer of barley was to be appraised at fifty shekels, so that a field sown with an omer of barley would be valued at fifty shekels. As an omer was equal to ten ephahs (Eze 45:11), and, according to the calculation made by Thenius, held about 225 lbs., the fifty shekels cannot have been the average value of the yearly produce of such a field, but must be understood, as it was by the Rabbins, as the value of the produce of a complete jubilee period of 49 or 50 years; so that whoever wished to redeem the field had to pay, according to Mishnah, Erachin vii. 1, a shekel and a fifth per annum.