The Book of Zeraim (Agricultural Ordinances) by the Rambam
A new translation with commentary, notes and diagrams by Rabbi Rabbi Eliyahu Touger.
This volume deals with:
The Laws of Forbidden Mixtures
The Laws of Gifts to the Poor
The Laws of Terumot.
The Laws of Tithes.
The Laws of the Second Tithe and the Produce of the Fourth Year.
The Laws of the First Fruits and the Other Presents Given to the Priests.
The Laws of Sabbatical and Jubilee Years.