Soil quality seems not to be capped anymore by survi? Didnt see anything about it in patch notes.
I dig 10/43/19 soil with character:
Unarmed Combat 3
Melee Combat 1
Marksmanship 1
Exploration 10
Stealth 1
Sewing 1
Smithing 3
Carpentry 1
Cooking 1
Farming 50
Survival 14