Opponents of Missouri's Right to Farm constitutional amendment were weighing a recount request Wednesday, a day after the measure appeared to pass by the slimmest of margins. The unofficial tally from Tuesday's election showed that with nearly 1 million votes cast, Amendment 1 carried by just over 2,500 votes, a margin of 0.2 percent. The measure was favored in most rural counties, but opposition in the St. Louis, Kansas City, Springfield and Columbia areas was nearly enough to offset it. Missouri law allows for a recount if the victory margin is 0.5 percent or less, but the losing side must request it. The request can't be made until the vote is certified, which could take up to three weeks, Missouri Secretary of State spokesman Kevin Flannery said Wednesday.