Here is a closer chord progression to my ear. 

Half-step down tuning (Eb, Ab, Db, Gb, Bb, Eb)

INTRO:

G            D     X2

VERSE 1:

         G                     C
Well I heard he needed some help on the farm
         D                     C
Somebody with a truck and two strong arms
          G                  D   
Not scared of dirt and willin' to work
         C            D
till the sun goes down
          G
So I pulled up and said I'm your man
           D
I could start right now and we shook hands
         G
He said the fence needs fixin',
      D
the peaches need pickin'
      C                       D
And the cows need bringin round

CHORUS 1:

         G                    D
I was haulin' hay, I was feedin' the hogs
         G                       D
and that summer sun had me sweatin' like a dog
       Am
So I cooled off in the creek
      G                           D
then it was back to work in the dag gum heat
     G                        D
I was cussin' out loud, thinkin' bout quitin'
    G                   D
Lookin' back now I'm sure glad I didn't
     Am                      Cadd9                                
Cuz just when i thought it couldn't get no hotter
             C                       D
I caught glimpse of the farmer's daughter


VERSE 2:

         G                       C
She was just gettin' home from Panama city
          D                  C
She was all tanned up and my kinda pretty
       G
When her eyes met mine
     D                            C
I was thinkin' that I would sure love my job
         G                        C
As the days got shorter our talks got longer
       D                      C
The kisses got sweeter and the feelings got stronger
       G                        D
So we'd hop in the truck and get all tangled up
      C
Every chance we got

CHORUS 2:

        G
We were down by the river all night long
           D
When the sun came up I was sneakin' her home
         Am
And draggin' my butt to work
           C                       D
With the smell of her perfume on my shirt
         G      
I'd be on the tractor she'd be on my mind
        D
With that sun beatin' down on this back of mine
   Am                            Cadd9
Just when I thought it couldn't get no hotter
   C                         D
I fell in love with the farmer's daughter

BRIDGE:

  Am                   D
We got married last spring
Am                                        D
Woah and there ain't no better life for me

CHORUS/OUTRO:
         G                          
Im still haulin' hay and feedin' the hogs
         D
And that summer suns has me sweatin' like a dog
       Am
So I cool off in the creek
          C                          D
And she brings me outta glass of sweet ice tea
      G
Im on the tractor and shes on my mind
      D
And I cant wait til its quittin' time
     Am                 Cadd9
And just when I think it cant get no hotter
  C                   D
I come home to the farmer's daughter

G                   D
      D              G
Yeah the farmer's daughter


Suggestions welcome. 
-Cody