The Senate began debating and voting in earnest on amendments to the farm bill Tuesday after reaching a long-awaited deal on which riders to consider. Seventy-three amendments were put in order on everything from food stamp cuts to aerial farm inspections to income limits for crop insurance subsidies. The deal worked out by Ag Chair Debbie Stabenow, Ranking Ag Republican Pat Roberts and Senate leaders is expected to get the Senate Farm Bill across the finish line this week. But Majority Leader Harry Reid threatened long hours unless amendment consideration is sped up…