A new push to improve Haiti's struggling agricultural sector could provide jobs for many people displaced after January's earthquake. But the nation's farmland is limited in supply and often degraded of nutrients.

Kathie Klarreich, a freelance writer who also worked as a fixer/producer for the NewsHour in Haiti, sent us the story of one child's rescue from the earthquake rubble, her transfer to the United States for medical treatment, and her family's…