Ancient Agricultural Production Intensification

According the research and reporting by noted archaeologists, there were three main technological advances resulting in food production intensification in pre-contact Hawai‘i: (a) walled fishponds, (b) terraced pondfields with their irrigation systems and (c) systematic dry-land field cultivation organized by vegetation zones.

Walled Fishponds

The Hawaiian walled fishpond stands as a technological achievement unmatched elsewhere in island Oceania.  Hawaiians built rock-walled enclosures in near shore waters, to raise fish for their communities and families.  It is believed these were first built around the fifteenth century.

Only in Hawaiʻi was there such an intensive effort to utilize practically every body of water, from seashore to upland forests, as a source of food, for either agriculture or aquaculture.

The ancient Hawaiian fishpond is a sophisticated land and ocean resource management technique.  Utilizing raw materials such as rocks, corals, vines and woods, the Hawaiians created great walls (kuapā) and gates (mākāhā) for these fishponds.

The general term for a fishpond is loko (pond), or more specifically, loko iʻa (fishpond).  Loko iʻa were used for the fattening and storing of fish for food and also as a source for kapu (forbidden) fish.

The cultivation of fish took place in Hawaiian agricultural pondfields as well as in specialized fresh and brackish water fishponds. Walled, brackish-water fishponds were usually constructed on the reef along the shore and one or more mākāhā.

Samuel M. Kamakau points out that “one can see that they were built as government projects by chiefs, for it was a very big task to build one, (and) commoners could not have done it (singly, or without co-ordination.)” Chiefs had the power to command a labor force large enough to transport the tons of rock required and to construct such great walls.

In 1848, when King Kamehameha III pronounced the Great Māhele, or land distribution, Hawaiian fishponds were considered private property.  This was confirmed in subsequent Court cases that noted “titles to fishponds are recognized to the same extent and in the same manner as rights recognized in fast land.”

Lo‘i Kalo (terraced pondfields)

A second technological invention by Hawaiian Polynesians was the development of their extended stone-faced, terraced pondfields (lo‘i) and their accompanying irrigation systems (‘auwai) for the intensive cultivation of wetland taro (kalo.)

The terraces were irrigated with water brought in ditches from springs and streams high in the valleys, allowing extensive areas of the valleys to be cultivated. The irrigation ditches and pondfields were engineered to allow the cool water to circulate among the taro plants and from terrace to terrace, avoiding stagnation and overheating by the sun, which would rot the taro tubers.

An acre of irrigated pondfields produced as much as five times the amount of taro as an acre of dryland cultivation. Over a period of several years, irrigated pondfields could be as much as 10 or 15 times more productive than unirrigated taro gardens, as dryland gardens need to lie fallow for greater lengths of time thin irrigated gardens.

In addition, walled pondfields not only produce taro, but were also used to raise an additional source of food, freshwater fish: primarily the Hawaiian goby (‘o‘opu nakea) and certain kinds of shrimp (‘opae.)

Captain George Vancouver visited O‘ahu in 1792 and wrote about the taro gardens in tine Waikīkī-Kapahulu-Mo‘ili‘ili-Manana complex that he observed:
“Our guides led us to the northward through the village [Waikiki], to an exceedingly well-made causeway, about twelve feet broad, with a ditch on each side.  This opened to our view a spacious plain…the major part appeared divided into fields of irregular shape and figure, which were separated from each other by low stone walls, and were in a very high state of cultivation.”

In 1815, the explorer Kotzebue added to these descriptions by writing about the gardens and the artificial ponds that were scattered throughout the area:
“The luxuriant taro-fields, which might be properly called taro-lake, attracted my attention.  Each of these consisted of about one hundred and sixty square feet, forms a regular square, and walled round with stones, like our basins. This field or tank contained two feet of water, in whose slimy bottom the taro was planted, as it only grows in moist places. Each had two sluices. One to receive, and the other to let out, the water into the next field, whence it was carried farther.”

Dryland Field System

The third form of subsistence intensification involved the systematic cultivation of dryland crops in their appropriate vegetation zones as exemplified by the Field Systems in Kona, Kohala, Kaupō and Kalaupapa (Ka‘ū reportedly also has a field system.)

Cultivation of the soil in Kona was characterized by a variety of non-irrigated root and tree crops grown for subsistence, each farmer having gardens in one or more vegetation zones. Each crop was cultivated in the zone in which it grew best.

Reverend William Ellis described the area behind Kailua town in Kona above the breadfruit and mountain apple trees as, “The path now lay through a beautiful part of the country, quite a garden compared with that through which they had passed on first leaving the town.”

“It was generally divided into small fields, about fifteen rods square fenced with low stone walls, built with fragments of lava gathered from the surface of the enclosures. These fields were planted with bananas, sweet potatoes, mountain taro, paper mulberry plants, melons, and sugar-cane, which flourished luxuriantly in every direction.”

Farmers found, farmed and intensified production on lands that were poised between being too wet and too dry.  Archaeological evidence of intensive cultivation of sweet potato and other dryland crops is extensive, including walls, terraces, mounds and other features.

The fields were typically oriented parallel to the elevation contours and the walls; sometimes these were made up of a grid of rain-fed plots, defined by low stone field walls built, in part, to shelter sweet potatoes and other crops from the wind.

Since the dryland technique was away from supplemental water sources, this was truly dryland agriculture.  There was no evidence to level terraces as in irrigated pondfield systems (taro lo‘i,) and there was no evidence of water control features or channels; so the conclusion was the system was strictly rainfed.

The inspiration (and much of the information) for this post came from research from Dr. Marion Kelly.  The image is a portion of an 1893 map prepared by Wall showing pondfields and fish ponds in Waikīkī (note, the "rice fields" used to be taro loʻi.)  In addition, I have added other images in a folder of like name in the Photos section on my Facebook page.

http://www.facebook.com/peter.t.young.hawaii

© 2012 Hoʻokuleana LLC

Kalaupapa Field System

Moloka‘i Island can be divided into three ecological regions based on rainfall, exposure to northeast trade winds and landform: (1) the wet, windward valleys of the north shore, (2) the dry, leeward valleys of the south shore, and (3) the arid rocklands of the island’s west end.

The Kalaupapa Peninsula, located at the western end of these valleys, is a unique landform formed by a volcanic rejuvenation centered on the Kauhakō Crater (about 330-thousand years ago,) at the base of the north shore’s cliffs.

Archaeological and carbon-dating evidence indicate that the initial settlement and presence of people on the Kalaupapa ("the flat plain") peninsula on the Island of Molokaʻi was between 800 and 1200.

Next to the peninsula is a distinctly-different, wet ecological zone with sediment soils distributed at the bottoms of the short Waihānau and Wai‘ale‘ia Valleys, the large Waikolu Valley and along the base of the cliffs.

Based on archaeological studies, the northern portion of the peninsula has “two main types of agricultural complexes … alignments with enclosures around them, and alignments without enclosures”.  The density of plots within the later type suggested “possible intensification of an earlier field system”.

Identified as the Kalaupapa Field System, there is a grid of rain-fed plots, defined by low stone field walls built, in part, to shelter sweet potatoes and other crops from trade winds, that cover the Kalaupapa Peninsula.

It appears that the field system was a secondary area of settlement and agricultural development, with the wetter valley and sediment soil being the preferred areas.

Like other windward areas, wind erosion is a problem.  To address this, long, narrow linear plots (defined by low field walls,) are packed densely together in locations exposed to the northeast trade winds.  In addition, plots were in swales between boulder outcrops.

Initial theories suggested the entire field system was primarily the result of a historic boom in the production of potatoes for “gold rush” markets in California.

Recent work by various teams of archaeologists, which included surveys in different ecological zones - specifically, the peninsula and several valleys - revealed a well-preserved archaeological landscape across the region.

Instead of enclosed fields associated with the more recent historic era, archaeologists found dense rows of unenclosed alignments and substantial house sites quite unlike the temporary shelters found in other Hawaiian field systems.

The findings suggest that early agricultural development in the area started well before the "gold rush" exports and was first concentrated in valleys (with permanent streams) and, perhaps more significantly, that most of the Kalaupapa Field System was likely to have been built before European contact.

Although limited cultivation in dryland environments may have begun as early as 1200 and continued through the 13th century, widespread burning across the Kalaupapa Peninsula, which archaeologists suggest signals of the beginning of the Kalaupapa Field System, does not commence until 1450-1550.

It appears that not only is there a correlation between rich, geologically young soils and Hawaiian dryland intensive agricultural systems, but also the creation of these large-scale systems around 1400 appears to have been nearly simultaneous in both windward and leeward districts.

Then, between 1650 and 1795, there were increases in the peninsula population, indicated by house sites, rock shelters, an animal enclosure, a possible shrine and a site interpreted as a men’s house (mua.)

In terms of agriculture, there is good evidence that people continued to actively cultivate the entire area throughout this period.

Following the abandonment of the field system at the end of the 18th century, settlement shifted to small house sites spread along the coast and local roadways.

The introduction of cattle in 1830 caused the construction of large, architecturally-distinct walls to protect fields and yards from roving animals.

In 1849, portions of the fields were reactivated and intensified to supply potatoes and other crops to California’s “gold rush” markets.

The Kingdom of Hawaiʻi instituted in 1865 a near century-long program of segregation and isolation of patients with Hansen’s Disease (leprosy) and patients were banished to the isolated peninsula of Kalaupapa, displacing resident families.

The image is an aerial view of the Kalaupapa peninsula area – the parallel walls are easily evident in the image.  Information and images here are from work and publications from Mark D. McCoy, PhD, Assistant Professor, Anthropology at San Jose State University.  In addition, I have added other images in a folder of like name in the Photos section on my Facebook page.

http://www.facebook.com/peter.t.young.hawaii

© 2012 Hoʻokuleana LLC