It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) forbade muzabanah and muhaqalah. The meaning of muzabanah has been mentioned above, and muhaqalah is when a wheat crop is sold in exchange for dry wheat.
Except for wheat, the same ruling applies to all other grains. The well-known meaning of muhaqalah is the one mentioned in the translation, and the meaning mentioned in the hadith by Imam Malik (may Allah have mercy on him) is this: renting out land in exchange for wheat, that is, a person gives his land to someone to sow wheat, and fixes its rent as a certain amount of wheat when it grows. This is also called mukhabarah.