my villagers do not reproduce at all. I've tried in many aways

1- I alloted their inventories with carrots,bread and even potatoes but no way works

2- I tried to leave only one villager as a farmer, it didn't work either.

3- I tried to leave two farmers, it didn't work either

4- I tried to put them away from my house but it didn't work either.

 I'm 3 days trying to make this farm work, can someone help me?