The Land of Israel: Terumah, Ma'aser, Shmittah and Yovel, Kilayim: Mixtures of Crops:
What are the laws about mixtures of crops?
Different kinds of food crops must not be planted in
such a way that they grow mixed together (Yoreh Deah
Sec.291). Grain or vegetables must not be planted
next to grape vines (Sec.296), but they can be
planted next to other types of trees, and different
types of trees can be planted next to each other
(Sec.295).
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