Here is the full list of all 23 Farming Simulator 19 achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Own a bank account with 10 million ingame money
Cultivate 100 hectares
Complete 100 missions
Breed 20 cows
Breed 50 pigs
Cut down 25 trees
Complete 50 missions
Sow 100 hectares
Breed 30 sheep
Harvest 100 hectares
Breed 100 chickens
Fertilize 100 hectares
Cut down 1 tree
Cultivate 10 hectares
Sow 10 hectares
Harvest 10 hectares
Reach 10 hours of playing time in a single savegame
Fertilize 10 hectares
Fertilize 1 hectare
Complete 1 mission
Sow 1 hectare
Cultivate 1 hectare
Harvest 1 hectare