The Ifugao Rice Terraces illustrate the remarkable ability of human culture to adapt to new social and climate pressures as well as to implement and develop new ideas and technologies.
[3][4][5][6][7] Maintenance of the living rice terraces reflects a primarily cooperative approach of the whole community which is based on detailed knowledge of the rich diversity of biological resources existing in the Ifugao agro-ecosystem, a finely tuned annual system respecting lunar cycles, zoning and planning, extensive soil conservation, and mastery of a complex pest control regime based on the processing of a variety of herbs, accompanied by religious rituals.
Owing to the difficult terrain, the Cordillera tribes are among the few peoples of the Philippines who have successfully resisted any foreign domination and have preserved their authentic tribal culture.
[8] Apart from the idjang stone-fortresses of the Ivatan of the Batanes, the terraces, which spread over five present-day provinces, are the only other form of surviving stone construction from the pre-colonial period.
One important method is the use of the Bayesian model, which applies radiocarbon dating to tiered rice fields in the Northern Philippines.
According to Stephen Acabado, “The Bayesian approach starts with what is known about the relative deposition order of the two layers and then modifies this knowledge in the light of the 14C dating information.
[11] The five clusters inscribed as part of the Rice Terraces of the Philippine Cordilleras are Batad, Bangaan, Hungduan, Mayoyao Central and Nagacadan.
All located in the Ifugao region, the Rice Terraces also feature as one of the Globally Important Agricultural Heritage Sites or GIAHS.
A biorhythm technology, in which cultural activities are harmonized with the rhythm of climate and hydrology management, has enabled farmers to grow rice at over 1,000 meters.
The Hudhud consists of narrative chants performed mainly by elder Ifugao women usually during the rice sowing season, at harvest time and at funeral wakes and rituals.
[14] Even with the introduction of mechanical equipment like cultivators and threshers, many young Ifugaos still shun farming, perceiving it as an occupation for the uneducated.
[17] Similar to earthworms, swamp eels bore holes on irrigation dikes and rice paddies, making these vulnerable to collapse.
[14][19] Due to poverty, many farmers are shifting to vegetable production which promises more income in a short time compared to rice, which takes six months to grow and offers less market value.
[16] With tourism, some Ifugaos have converted their rice paddies into residential lots where lodging houses and display shops are built.
Under the cooperative practice, neighbouring farmers would go voluntarily to one field to clear weeds, plant or harvest rice, or repair damaged paddy walls or irrigation canals.
It has passed by UNESCO's standards[8] due to the blending of the physical, socio-cultural, economic, religious, and political environment as a living cultural landscape.
The Philippines sought danger listing as a way to raise national and international support and cooperation in the preservation of the heritage site.
[28] In 2012, UNESCO has removed the Rice Terraces from the list of sites in danger in recognition of the success of the Philippines in improving its conservation.