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How Cuba went from a petro-industrial and hugely disruptive agriculture to one of draft animals, no pesticides, traditional fertilizers and small urban farms, virtually overnight. And vastly increased harvests doing so. craftsmanship.net/cubas-harvest-… 
The Cubans ate local, produced local, and ate better for it. Instead of a few monoculture mega farms, they had hundreds of thousands of small urban farms. (Ht:@Rjrasva)
@Rjrasva The same effect was recently observed in Hainan, China, where rubber plantation "farmers who took environmental concerns into account doubled their incomes and reduced reliance on a single harvest while also gaining environmental benefits from the land." phys.org/news/2019-04-f…
@Rjrasva That monoculture vastly reduces crop production even when the secondary crops are non-productive themselves, is well known. Here is an example in the UK.
@Rjrasva Another magic thing happens when farms are reduced in size, suddenly the horses becomes competitive. At 70 acres a horse teams is more efficient than diesel powered tractors:
@Rjrasva What is 70 acres? Well in China on 70 acres hand you could feed and clothe a village of 336 people. For a historical perspective from medieval Europe...
