Mariama Keita grows peanuts the old-fashioned way: using hoes, pitchforks and, when needed, horses as beasts of burden.
She doesn't have a tractor or any mechanized tools.
But the mother of two does have one new weapon in her agricultural arsenal to help keep her farm running: her cellphone.
For the last eight years, Keita has been farming the 10 acres she inherited from her father. The property is in Kaffrine in central Senegal — the country's peanut-growing region.