JUANA SUMMERS, HOST: The war between the U.S. and Iran has strained shipping in the Strait of Hormuz, and some of the Gulf's biggest exports are fertilizers and their ingredients. The war caused a price spike for farmers in sub-Saharan Africa, which imports 80% of its fertilizer. And while prices have now eased, they remain high in some countries. As NPR's Durrie Bouscaren reports, farmers in Zambia have found an unlikely solution in an old Korean and Japanese method. DURRIE BOUSCAREN, BYLINE: On 12 acres outside of Lusaka. Kanangwa Newlove says she has built a paradise. KANANGWA NEWLOVE: Oh, my God. Our journey was quite long. BOUSCAREN: She started small after her daughter was born. She wanted to grow food without pesticides or chemicals. NEWLOVE: I started taking some vegetables to my work, to my workmates. And before I knew it, I was supplying the supermarket. You know, it went on and on and on. BOUSCAREN: Sixteen years later, shady fruit trees dot her fields. Long tomato vines drape over trellises. There are tidy rows of corn and pumpkins and a local vegetable called blackjack. Eleven varieties of lettuce. NEWLOVE: It's sort of, like, just a labor of love. BOUSCAREN:...

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