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Aterrace inagriculture is a flat surface that has been cut into hills or mountains to provide areas for the cultivation for crops, as a method of more effectivefarming. Terrace agriculture or cultivation is when these platforms are created successively down the terrain in a pattern that resembles the steps of a staircase. As a type oflandscaping, it is calledterracing.
Terraced fields decrease botherosion andsurface runoff, and may be used to support growing crops that requireirrigation, such asrice. TheRice Terraces of the Philippine Cordilleras have been designated as a UNESCOWorld Heritage Site because of the significance of this technique.[1]
Terracedpaddy fields are used widely in rice,wheat andbarley farming ineast,south,southwest, andsoutheast Asia, as well as theMediterranean Basin, Africa, and South America. Drier-climate terrace farming is common throughout the Mediterranean Basin, where they are used forvineyards,olive trees,cork oak, and other crops.[citation needed]
TheYemen Highlands are known for their terrace systems which were constructed at the beginning ofBronze Age in the3rd millennium BC.[2] Similar early terrace systems have been documented in the Levant, where archaeological and geomorphological evidence supports terrace farming as early as the 4th millennium BCE, with widespread implementation in the Bronze and Iron Ages across arid environments such as the Negev Desert and Petra region[3].
Terracing is also used for sloping terrain; theHanging Gardens of Babylon may have been built on an artificial mountain with stepped terraces, such as those on aziggurat.[citation needed] At the seasideVilla of the Papyri inHerculaneum, the villa gardens ofJulius Caesar's father-in-law were designed in terraces to give pleasant and varied views of the Bay of Naples.[citation needed]
Archaeological evidence from the Kislovodsk basin in the northern Caucasus indicates the use of terrace agriculture from the beginning of the first millennium BC, associated with the Koban culture, and continuing into the first millennium AD with later adaptations by Alanic communities.[4] In the Mediterranean region, Optically Stimulated Luminescence (OSL) profiling and dating[5] has revealed a major intensification of terrace construction during the later Middle Ages (c. AD 1100–1600), indicating a significant investment of labor in landscape modification during this period.[6][7]
Intensive terrace farming is believed to have been practiced before the early 15th century AD inWest Africa.[8][9] Terraces were used by many groups, notably theMafa,[10]Ngas,Gwoza,[11] and theDogon.[12]
It was long held that steep mountain landscapes are not conducive to, or do not even permit, agricultural mechanization. In the 1970s in the EuropeanAlps,pasture farms began mechanizing the management of alpine pastures and harvesting of forage grasses through use of single axletwo-wheel tractors (2WTs) and very low center of gravity articulated steering 4-wheel tractors. Their designs by various European manufacturers were initially quite simple but effective, allowing them to cross slopes approaching 20%. In the 2000s new designs of wheels and tires, tracks, etc, and incorporation of electronics for better and safer control, allowed these machines to operate on slopes greater than 20% with various implements such as reaper-harvesters, rakes, balers, and transport trailers.[citation needed]
In Asian sub-tropical countries, a similar process has begun with the introduction of smaller, lower-tech and much lower-priced 2WTs in the 4-9 horsepower range that can be safely operated in the small, narrow terraces, and are light enough to be lifted and lowered from one terrace to the next. What is different from the Alpine use is that these 2WTs are being used for tillage and crop establishment ofmaize, wheat, andpotato crops, and with their small 60-70cm-wide rotovators and special cage wheels are puddling the terraces for transplanted and broadcast rice. Farmers are also using the engines as stationary power sources for poweringwater pumps andthreshers. Even more recently farmers are experimenting with use of smallreaper-harvester attachments. In Nepal, the low costs of these mostly Chinese-made machines and the increased productivity they produce[13] have meant that this scale-appropriate machinery is spreading across Nepal'sHimalaya Mountains and likely into the other countries of the Himalaya andHindu Kush.[citation needed]
In the South AmericanAndes, farmers have used terraces, known asandenes, for over a thousand years to farm potatoes, maize, and other native crops. Terraced farming was developed by theWari culture and other peoples of the south-central Andes before 1000 AD, centuries before they were used by the Inca, who adopted them. The terraces were built to make the most efficient use of shallow soil and to enable irrigation of crops by allowing runoff to occur through the outlet.[14]
The Inca people built on these, developing a system ofcanals,aqueducts, andpuquios to direct water through dry land and increase fertility levels and growth.[15] These terraced farms are found wherever mountain villages have existed in the Andes. They provided the food necessary to support the populations of great Inca cities and religious centres such asMachu Picchu.[citation needed]
In mountainous areas ofMyanmar, terrace farming is known locally as the staircase or ladder farming (in Myanmar:mm:လှေခါးထစ်တောင်ယာ) and the agriculture technique of that kind is known asလှေခါးထစ်စိုက်ပျိုးနည်း.
InJapan, some of the100 Selected Terraced Rice Fields (inJapanese:日本の棚田百選一覧), fromIwate in the north toKagoshima in the south, are slowly disappearing, but volunteers are helping the farmers both to maintain their traditional methods and for sightseeing purposes.[16]
Terraced fields are common in islands with steep slopes. TheCanary Islands present a complex system of terraces covering the landscape from the coastal irrigated plantations to the dry fields in the highlands. These terraces, which are namedcadenas (chains), are built with stone walls of skillful design, which include attached stairs and channels.[17]
InOld English, a terrace was also called a "lynch" (lynchet). An example of an ancient Lynch Mill is inLyme Regis. The water is directed from a river by a duct along a terrace. This set-up was used in steep hilly areas in the UK.[18]
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Ancient terraces are a common feature in theJerusalem Mountains, often found in conjunction with ancient rock-cut agricultural structures including quarries, winepresses, olive oil presses, water holes, lime kilns, roads, andagricultural watchtowers.[19] According to Zvi Ron's estimation, these terraces encompass approximately 56% of the open grounds in the area.[20]
Despite their prevalence, there is a lack of consensus among scholars regarding their construction date. Various theories have been proposed, with Zvi Ron suggesting that their origins date back to ancient times, Finkelstein proposing theMiddle Bronze Age, and Feig, Stager, and Harel suggesting theIron Age. ArchaeologistsGibson and Edelstein conducted research on terrace systems in the Rephaim valley, proposing that the ones inKhirbet er-Ras were built during the Iron Age II, whereas those inEin Yael were linked to theSecond Temple andRoman periods. Seligman suggested that while some terraces were established in ancient times, the majority of them are more likely to have originated during the Roman andByzantine periods.[19] A 2014 research study on terraces nearRamat Rachel, usingOptically Stimulated Luminescence (OSL), yielded dates ranging from theHellenistic period toMamluk andOttoman times. The majority of the samples fell within the latter periods.[21] However, the study's ability to precisely determine the original construction date remains uncertain, as the results could also reflect subsequent agricultural modifications that affected exposure to sunlight.[19]
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