O.k. So this is gonna be really hard to explain to where you can get what i'm saying so i'll do my best.
Heres the main riff, I tried. 
x-x-x-x-0-x-x-x-
x-x-x-x-0-x-x-x-
x-x-x-x-0-x-x-x-
2-2-x-x-0-x-x-x-
2-2-x-x-x-x-x-x-
0-0-3-0-x-0-2-3-

G#5 = 455xxx

Main riff

Can't take no more of this foolin round, gotta go down there, turn up some ground 

This old mule, these blades, theses lines on this plow, gonna work em on you, gonna crush you on down

The hard part is the same as the first part except the single notes are all turned into power chords. 
with a droning E. (you don't have to keep playing the actual E chord after the first one. just use the 
E string as a drone between each chord (that was straight from S.H.B. thanks again for the correction)

oh babe, i'm bout to plow you under, forget you forever and ever, i'm bound to plow you god damn under

Nobody wonder where you been either, I work hard all day trying to get you off my mind
These old folks down here they say son give it some time
This burning worried trouble, sorrow all the time, 
You gotta bone to pick b***h i'm gonna crush you f**king down

I'm bound to plow you under, forget you forever and ever, i'm bound to plow you god damn under
Nobody wonder where you been, yeah this songs about plowin, in case you didn't know
Gonna plow a while

Well my rear mules crippled, and my lead mules blind
Well my rear mules crippled, yeah my mighty lead mules blind
You can't do me baby, like you done poor shine
Well you worked him on the levy baby, yeah till he went stone blind

This part is extremely difficult to tab out for me, so heres my best shot
Listen and you can hear what i'm talking about.

E5   G#5 E5 G5 E5 F5 E5 F#5 G5

Some drunk ole' sinner say she never did wrong, some drunk old loser said she never did wrong
Kids throwing rocks...at a black bird on the line

i'm still down here plowing trying to get you off my mind
oh yeah babe, yeah and i spent last night crying
forget you forever and ever, i'm bound to plow you under

(slowed down main riff)
The sun is going down, the sun is going down, The sun is going down
Well the sun is going down 

Lyric corrections by S.H.B.  www.scottbiram.com