You know farming entails a lot of physical work. When harvesting laborers are needed and with covid measures it can be possible for them to meet again. That’s a problem to a farmer as he or she will halt or limit production thus food crises.
Secondly most of the farmers will not invest as the future is undetermined when the virus will end and things turn to normal.
So what is affecting a farmers are measures which affect but their workers and thus total output