Another list:

The 12 Best Country Songs About Farming from CountryLiving.com:
The original article (see link) contains links to videos, quotes from lyrics, and some discussion of each song:

1. Thank God I'm a Country Boy – John Denver, 1974
2. High Cotton – Alabama, 1989
3. Alabama Clay – Garth Brooks, 1989
4. Heartland – George Strait, 1993
5. Where Corn Don't Grow – Travis Tritt, 1996
6. Where the Green Grass Grows – Tim McGraw, 1997
7. Daddy Won't Sell the Farm – Montgomery Gentry, 1999
8. She Thinks My Tractor's Sexy – Kenny Chesney, 1999
9. Amarillo Sky – Jason Aldean, 2005
10. International Harvester – Craig Morgan, 2006
11. A Man on a Tractor – Rodney Atkins, 2006
12. Here's to the Farmer – Luke Bryan, 2016