Taters on the terraces In Weichang County, northern China, terraced fields stretch across the landscape. Terracing is a useful
agricultural technique in mountainous regions, as it prevents erosion and water runoff. Potatoes
are being grown here, but the method works well for other crops,
such as rice, olives, maize and grapes. Farmers around the world have been using terrace agriculture for centuries: the Rice Terraces of
the Philippine Cordilleras are a UNESCO site and are believed to be
more than 2,000 years old, while inhabitants of the Andes adopted the
method for farming maize and potatoes more than 1,000 years ago.