There are successful black farmers in South Africa, but inevitably the distribution of land to the blacks will result in many smaller farms, instead of industrial type farms. That is the opposite to what has happened in Canada where the family farms have been replaced by large industrial type farms. That is not necessarily bad for food production, as European and Canadian countries survived for long periods with small farms.I laughed myself to tears when I read that Ramaphosa said that the expropriation without compensation will not affect jobs and investments. The ANC replaced one half-witt with another. Modern farming is incredibly capital intensive and no bank will invest in an enterprise that comes with an built in instability. That means no money for equipment, seeds, irrigation, etc. Basically, it will push the agricultural sector back to the 19th century.
The political uproars and conflicts will have a negative influence on the economy, for sure, but that is different from food supply. The government could avoid all these conflicts by expropriating the land at fair prices, paid in 3% 30 year government bonds.