Menahot 71: Reaping What You Sow

Exclusions when it comes to harvesting the omer and bringing the offering - including an irrigated field, not fully ripe grain. The offering should come from standing grain, unless there's none to be found. Plus, what happens with fields that are "trimmed" via natural means, such as grasshoppers. Plus, making sense of Rabbi Meir's approach vs. Rabbi Shimon's approach.