Looks like a drag harrow. The lever would function to adjust the depth of the teeth. Here's a similar one:

http://forums.horsecity.com/index.php?showtopic=47075677  
Dana Slawson
Sr. Architectural Historian
 
Greenwood and Associates
725 Jacon Way
Pacific Palisades, CA 90272
Ph/Fax: 310.454.3091


>________________________________
> From: erik simpson <[log in to unmask]>
>To: [log in to unmask] 
>Sent: Thursday, April 26, 2012 3:44 PM
>Subject: Artifact ID - NM
> 
>This might be to easy for the fine folks on the listserve but I'd like a little help identifying this. We figure it might be part of a hay tedder but are really unsure. Follow the link for pictures. It is near an early 19th century homestead in NW New Mexico.
>
>Thanks,
>
>Erik
>
>http://s1172.photobucket.com/albums/r572/Archaeology_Guy/Historic%20Item/
>
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