IMO farming is going to have to change with the times and PO. Local farming, less than 100 miles to the nearest city may start to flourish again as the FF costs of farming skyrocket. Thats not to say farmers will be making tons of $, but the need for local produce may become a necessity as the costs will be less than importing food from 1000's of miles away.

Farming will likely go more in the direction of manual labour and less machinery. You still see plenty of human labourers even in North America. Back in the seventies and probably eighties and maybe even now, manual labourers were and are still the backbone of many types of farming here in NA.

Cuba went back to labour intensive farming in 93 when they lost 85% of their FF from the Soviets. Every piece of arable land in and around towns and cities was put into production and that is how they barely survived their own version of PO and decline.