For the past 30 years, Jose Vilomba, 47, has walked barefoot on one of Africa’s most fertile valleys using his hands and a shovel to plant vegetables to feed his family. “I’ve been doing this for years,” said Vilomba. “It’s what I do for a living.” But if post-civil war elections in Angola end well, the state-owned land Vilomba is working on could soon be sold to major food producers and the expiration date on his small harvest could equally apply to his own way of life.