Bava Metzia 104 - June 11, 5 Sivan

If a sharecropper agrees to work an irrigated field and the river dries up, can the sharecropper deduct something from the payment to the owner, as the work is more difficult than expected? On what does it depend? If one agrees to sharecrop for a percentage of the yield and decides not to work the land, one still needs the landowner according to the agreed-upon percentage calculated at what the field should have yielded. Rabbi Meir says this is common law that became halakha as it is derived from the commonly used language in sharecropper contracts, as we doresh lashon hedyot. There are various interpretations of what this means and several cases in which this principle is used. If a sharecropper said, "If I don't work the land I will pay you one thousand zuzim," there is a disagreement about whether this is binding, as it seems like it was just an exaggeration, asmachta, which would render it meaningless. Rava explains several details regarding a heiter iska - how it works and how it is meant to protect the investor's rights. A heiter iska allows one to invest money for someone else in a way that they can share the profits while avoiding issues of interest. It is set up in a way that a loss will be split 50/50 but gains 2/3 to the borrower (the one investing the money) and 1/3 to the investor. Therefore, if one splits one investment into two documents, there can be a loss for the investor if one yields profits and the other a loss.  If two investment are combined into one document, it can cause a loss for the borrower.