In legislative terms a bill is a proposal for.?

In legislative terms, a bill is a proposed legislation being considered by the legislature. All bills will eventually become laws if they were approved by the majority of the legislature and in most cases approved by the executive branch of the government. Once a particular bill has been approved and therefore enacted into a law, it will now be called an Act or a Statute. This term is commonly used in the United States and the commonwealth. Prior to the introduction to the legislature, bills are originally called draft bills.

The answer is crop yield.