Here is the full list of all 24 Farming Simulator 19 trophies - there are 6 bronze, 11 silver, 6 gold and 1 platinum.
Collect all trophies
Complete 100 missions
Complete 50 missions
Own a bank account with 10 million ingame money
Breed 20 cows
Breed 30 sheep
Cut down 25 trees
Cultivate 100 hectares
Breed 50 pigs
Cultivate 10 hectares
Cultivate 1 hectare
Breed 100 chickens
Harvest 100 hectares
Sow 100 hectares
Cut down 1 tree
Fertilize 100 hectares
Harvest 10 hectares
Sow 10 hectares
Complete 1 mission
Reach 10 hours of playing time in a single savegame
Fertilize 10 hectares
Fertilize 1 hectare
Harvest 1 hectare
Sow 1 hectare