Africa’s farmland could be worth $1 trillion, but global shocks are raising the stakes. Fertilizer shortages, rising costs and supply disruptions are putting pressure on food production across the continent. -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.bloomberg.com for business news & analysis, up-to-the-minute market data,