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
Breed 20 cows
Breed 30 sheep
Cultivate 100 hectares
Harvest 100 hectares
Sow 100 hectares
Breed 50 pigs
Fertilize 100 hectares
Breed 100 chickens
Reach 10 hours of playing time in a single savegame
Cut down 25 trees
Fertilize 10 hectares
Cultivate 10 hectares
Harvest 10 hectares
Sow 10 hectares
Own a bank account with 10 million ingame money
Fertilize 1 hectare
Cultivate 1 hectare
Harvest 1 hectare
Cut down 1 tree
Complete 1 mission
Sow 1 hectare