Labels: text | screenshot | font OCR: These photographs show the agriculture of the Baliem Valley in Irian Jaya in western New Guinea (now part of Indonesia). This system was close to being the most intensive agricultural system practiced on the island of New Guinea. A whole valley floor has been drained and turned into large sweet-potato gardens. The photograph fertilizing fields shows how spoil from the ditches was tossed onto the surface of the plots to enrich the soil. Slopes were terraced with stone walls to slow erosion, and the soil worked to keep it productive. These terraces were not as widely known as those in Indonesia or the island of Luzon in the Philippines, but they are equally impressive modifications of the landscape.