What is the ruling on using carrion as fertilizer?

Question:
Using carrion as fertilizer for some crops, such as palm trees.

Answer:
This returns to the disagreement regarding impurity when it undergoes a change in nature: is it permissible to eat the plants and fruits that result from it, such as when crops or trees are fertilized with excrement? There is a disagreement among the scholars, and the stronger position is that one should avoid these things because they are nourished by something [impure]. The Prophet (peace and blessings be upon him) prohibited the milk of the *jalalah*—the sheep that eats excrement. The Messenger (peace and blessings be upon him) prohibited drinking their milk until they are confined and fed pure food for three days. Therefore, the stronger position is that this is not permissible; it is not permissible to use impurities for fertilization, whether blood, the bones of a dead animal, or human excrement. Yes.