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Terrace (earthworks)

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A terrace is a flat surface cut into hills or mountains to allow for effective farming. This method of landscaping, known as terracing, creates a series of broad, flat steps that resemble a staircase.

RiceTerracesVietnam
RiceTerracesVietnam

These platforms are essential for cultivating crops on steep terrain. They serve two main purposes: reducing soil erosion and controlling surface runoff. By managing how water moves across the land, terraces can support crops that require constant irrigation, such as rice. Because of their cultural and agricultural importance, sites like the Rice Terraces of the Philippine Cordilleras are designated as UNESCO World Heritage Sites.

The mechanism of terracing involves significant modification of the natural landscape. Farmers create successive platforms that descend the terrain in a patterned way. In some regions, such as the Canary Islands, these are called cadenas, or chains.

Volcanic Landscapes of La Gomera 14
Volcanic Landscapes of La Gomera 14

These systems use skillfully designed stone walls that often include attached stairs and water channels. In the Andes, known as andenes, the steps are engineered to make the most efficient use of shallow soil. These terraces allow runoff to flow through specific outlets, which helps manage water for the plants. This controlled flow is vital for maintaining fertility and ensuring crops receive enough moisture.

Terrace agriculture varies significantly depending on the climate and the specific crops being grown. In the Mediterranean Basin, drier-climate terraces are common. Farmers there use these levels for vineyards, olive trees, and cork oak.

Fukuoka-Tsuzura Rice Terrace in an Early Summer-xl
Fukuoka-Tsuzura Rice Terrace in an Early Summer-xl

In contrast, wet and sub-tropical regions often use terraced paddy fields for rice, wheat, or barley. These are widely found across East, South, Southwest, and Southeast Asia. In Myanmar, this technique is locally called ladder farming, or mm:‌လှေခါးထစ်‌တောင်ယာ. Each type of terrace is a specific response to the local environment and the needs of the plants.

Humans have used terracing for thousands of years across many different continents. In the Yemen Highlands, terrace systems were constructed during the Bronze Age in the 3rd millennium BC.

Haraz Mountains, Yemen (12633745063)
Haraz Mountains, Yemen (12633745063)

Similar systems appear in the Levant as early as the 4th millennium BCE. In the Caucasus, the Koban culture used terrace agriculture starting in the first millennium BC. In West Africa, intensive terrace farming likely existed before the early 15th century AD, practiced by groups like the Dogon and Mafa. Even in the Mediterranean, studies using Optically Stimulated Luminescence (OSL) show a major intensification of construction during the Middle Ages, between AD 1100 and 1600.

The significance of these structures is visible in the way they support large populations. In the South American Andes, the Wari culture developed andenes before 1000 AD. The Inca later adopted these terraces to grow potatoes and maize. These systems provided the food necessary to sustain massive Inca cities and religious centers like Machu Picchu.

Inca terrace-en
Inca terrace-en

In the Jerusalem Mountains, the impact of terracing is immense. Estimates suggest that terraces encompass approximately 56% of the open ground in that area. These ancient structures are often found alongside other historical features like winepresses and olive oil presses.

Modern technology is changing how farmers interact with these steep landscapes. Historically, steep mountains were thought to be impossible to farm using mechanization. However, in the 1970s, farmers in the European Alps began using small, two-wheel tractors to manage alpine pastures.

By the 2000s, new wheel designs and electronics allowed machines to operate on slopes greater than 20%. In Asia, smaller and more affordable 4-9 horsepower tractors are being introduced. These machines are light enough to be lifted from one terrace to the next. In Nepal, these low-cost machines are spreading across the Himalaya Mountains to increase productivity.

Terracing connects agriculture to broader themes of engineering, history, and environmental management. It represents a long-standing human effort to adapt the earth to meet food needs. From the ancient stone walls of the Canary Islands to the high-tech small tractors in the Himalayas, terracing remains a vital tool. It shows how people can modify a landscape to prevent erosion while maximizing the use of water and soil. Whether used for rice in Japan or olives in the Mediterranean, these "staircases" remain a fundamental part of human civilization.

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🖼️ Images & Media (8)
File:Haraz Mountains, Yemen (12633745063).jpg
Haraz Mountains, Yemen (12633745063).jpg
File:RiceTerracesVietnam.jpg
RiceTerracesVietnam.jpg
File:Terrace field yunnan china denoised.jpg
Terrace field yunnan china denoised.jpg
File:Fukuoka-Tsuzura Rice Terrace in an Early Summer-xl.jpg
Fukuoka-Tsuzura Rice Terrace in an Early...
Rice-Terrace.theora.ogv
File:Inca terrace-en.png
Inca terrace-en.png
File:Volcanic Landscapes of La Gomera 14.jpg
Volcanic Landscapes of La Gomera 14.jpg
File:Sunny_Side_Up_Terraces_in_Ein_Karem_(2)_(7689751886).jpg
Sunny_Side_Up_Terraces_in_Ein_Karem_(2)_(7...
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