Some 'aggressive' tool for ID

[fernando]

Thank you Richard,
I am not a member of the farming species, but i can imagine your fun in performing such exercises. Still in this case i ignore if there are equivalent tools over here.
But, speaking of (translating) names, i find the term 'spade' (pá) closer to the implement you describe, whereas calling 'knife' (faca) a three feet long thing ... go figure .