REMOVE

1. soil
2. barriers
3. rivers
4. plants
5. 1957

WHAT

1. black-and-white film (1)
2. clouds (1)
3. farmers (1)
4. farming (1)
5. farms (1)
6. fields (land) (1)
7. forests (plant communitie … (1)
8. hats (1)
9. machinery (1)
10. men (male humans) (1)
11. plows (agricultural equip … (1)
12. portraits (1)
13. sky (1)
14. tractors (agricultural eq … (1)
15. trees (1)
16. Visual Works (hierarchy n … (1)

WHERE

1. Bow Island, Alberta, Cana … (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1938 (1)
2. 1942 (1)
3. circa 1940 (1)