Unusual iron "point" - tool?

[brianc053]

Hi everyone. I dug this out of a farm field where a house dating back to the 1700's was located.
Because of its unusual shape and the different "features" on it I think it was something - and not just a random hunk of iron - once upon a time.

But does anyone have any idea as to what this was?
The things that are interesting to me:
- it seems to have a lot of concretion around it (is it "concretion" if it's just rust built up over decades in dirt? or does concretion only come from being in salt water?)
- I think the build-up is thick because of the 3rd picture and the last picture. Look at that "post" sticking out; can you see all the corrosion around it?
- the four posts sticking out (two top, two middle) have me confused
- the two notches what I think is the bottom make it look like something slid into it, maybe a post?

Anyway, I hope someone recognizes this, because it seems interesting to me.

 

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[Plug N Play]

Looks like a harrow spike.

 

[ticndig]

not a harrow spike , part of a sickle bar mower called a guard

 

[brianc053]

Oh that’s definitely what it looks like, now that you taught me that something called a harrow spike existed. I’ve never heard of that before - thanks!

 

[bradyboy]

we see these here often
brady

 

[ticndig]

I notice some one on esty site selling these sickle bar rock guards as harrow spikes , google image them both as you're sure to dig more at some point.

 

[brianc053]

Thanks everyone. I’ve never dug one, and yes ticndig it looks like a spike/tooth from a mower.