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October 13, 2023 by Peter T Young Leave a Comment

ʻUala

Many cultures in Hawaiʻi have their own names for sweet potato.  Kamote is the Tagalog name, and in Aotearoa (New Zealand) they are widely farmed and are called kumara.

In Hawaiʻi, ʻuala is also called ʻuwala.  The ʻuala is the second in importance to kalo (taro) as a staple starch food in old Hawaiʻi.

He ʻuala ka ʻai hoʻola koke i ka wi.
The sweet potato is the food that ends famine quickly
(ʻŌlelo Noʻeau from Pukui)

It is in the Morning Glory family and grows easy and it grows fast – within 4-5 months of planting (as opposed to nine to eighteen months for taro), ʻuala is cultivated for their enlarged primary roots called “tubers” (the primary food from the ʻuala,) while leaves can also be eaten.

Tubers were also used as bait for fishing; Vines were used to make an under cushion for lauhala mats in houses; and Fermented ʻuala “beer” (ʻuala ʻawaʻawa) brewed, but it is unclear if this is a pre-contact practice.  (Bishop Museum)

It is said ʻUala, sweet potato, was a canoe crop (believed to be brought to Hawaiʻi by the Polynesians, who brought with them shoots, roots, cuttings and seeds of various plants for food, cordage, medicine, fabric, containers, all of life’s vital needs.)

Tracing the history of agricultural products is one way scientists track the migration of people during times when no written records were left behind to offer clues. (Yirda; PHYS)

On his voyages across the Pacific, Captain James Cook encountered geographically disparate Polynesian societies, including those living on Easter Island, Hawai‘i and the north island of New Zealand. These far-flung communities cultivated a common crop, sweet potato. (Denham; NCBI)

Researchers later sampled specimens brought back by early explorers (including Cook.) They found that the DNA evidence indicated that the sweet potato had migrated to Polynesia long before European explorers had made their way to that part of the world. (Yirda; PHYS)

Peruvians first domesticated the sweet potato around 8,000-years ago. And though the crop spread from there, the means by which it traveled have always remained contentious.

One possibility was that Polynesian sailors first brought it home from across the ocean: The oldest carbonized sweet potato evidence in the Pacific hails back to about 1,000 AD – 500-years before Columbus sailed to the Americas.

It is known as the 2nd staple for the Hawaiians.  It is said to have been cultivated in Hawaiʻi since about AD 1000.  The tubers are consumed after cooking primarily in an imu.  Other plant parts were used as animal feed. (UH-KCC)

It’s been called a super food – the average sweet potato weighs 6.5 ounces (about 3/4 cup) and contains 180 calories. It supplies 14 percent of your daily carbohydrate requirement (good carbs) and 26 percent of your daily fiber needs. It is an excellent source of vitamins A and C, potassium, calcium and folate.  (Miyasaka)

Purple-fleshed or orange-fleshed varieties are rich in beta carotene and have more anti-oxidants than blueberries.  In addition, all sweet potatoes have a low glycemic index. This index is a measure of how quickly foods are broken down into sugars in the human body and converted to body fat. (Miyasaka)

The sweet potato plant grows in dry places. You can find it in low and high areas up to 5,000 feet in elevation. It can also be found in damp valleys although it doesn’t need a lot of water like taro does.

Farming of ʻuala on a large scale was involved the systematic cultivation of dryland crops in their appropriate vegetation zones as exemplified by the Field Systems in Kona, Kohala, Kaupō and Kalaupapa (Kaʻū reportedly also has a field system.)

Cultivation of the soil “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.”  (Reverend William Ellis)

Farmers found, farmed and intensified production on lands that were 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.

In Kona, the field system was quite large, extending from Kailua to south of Honaunau.  In lower elevations all the way to the shore, informal clearings, mounds and terraces were used to plant sweet potatoes; and on the forest fringe above the walled fields there were clearings, mounds and terraces.  Sweet potatoes grew among the breadfruit.

In Kohala, the fields were oriented parallel to the elevation contours and the walls (and perhaps kō (sugar cane) planted on them) would have functioned as windbreaks from the trade winds which sweep down the slopes of the Kohala mountains.

Configured in this way, the walls would also have reduced evapotranspiration and – with heavy mulching – retained essential moisture for the crops.  This alignment of fields also conserved water by retaining and dispersing surface run-off and inhibited wind erosion and soil creep.

Based on experimental plantings, if only half of the Kohala Field System was in production in one year, it could be producing between 20,000 to 120,000-tons of sweet potato in one crop.

At Kaupō, on the slopes of Haleakalā, the field system is associated in Hawaiian oral traditions with Kekaulike, a famous Maui king (ali‘i nui) who on genealogical estimates is dated to approximately the early eighteenth century.

Kekaulike made Kaupō his residential seat, and assembled his army at Mokulau, preparing for a war of conquest against his rivals on Hawai‘i Island.

Given its use as a Royal Center for Island Ali‘i, there was a definite need for sufficient crop production.  Fortunately, the area has an ideal combination of soils, elevation and rainfall making it also a predictable environment for an intensive dryland field system to feed the people.

Historic records note that this region was identified as “the greatest continuous dry planting area in the Hawaiian islands,” both in ancient times and well into the 1930s.

The field system a closely spaced grid of east-west embankments and small field plots bisected at right angles by longer north-south trending walls; it covered an area of 3,000 to nearly 4,000-acres and could have supported a population of 8,000-10,000 people.

At Kalaupapa peninsula, 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 before 1200.

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.

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.

At Kōloa, Kauai, another unique feature was found; the early Hawaiians constructed sophisticated irrigation systems tapping off of Waikomo Stream for growing their crops.

Beginning possibly as early as 1450, the Kōloa Field System was planned and built on the shallow lava soils to the east and west of Waikomo Stream.  It is characterized as a network of fields of both irrigated and dryland crops, built mainly upon one stream system.  Waikomo Stream was adapted into an inverted tree model with smaller branches leading off larger branches.

This agricultural system which at its peak covered over 1,000 acres extends from the present Kōloa town to the shoreline and includes a complex of wet and dryland agricultural fields and associated habitation sites.

Commercial sweet potato cultivation in the islands began in 1849. In 1919, sweet potato was considered tenth in value among agricultural crops in Hawai’i when grown as an emergency crop during the war years.  (Lots of information from Vitousek, Kirch, McCoy and Hammatt)

© 2023 Hoʻokuleana LLC

 

Filed Under: Hawaiian Traditions Tagged With: Kohala Field System, Uala, Kaupo Field System, Hawaii, Kona Field System, Canoe Crop, Sweet Potato, Kalaupapa Field System, Field System

August 5, 2023 by Peter T Young Leave a Comment

Kohala Field System

Throughout the younger islands of the Hawaiian archipelago, dryland agricultural field systems constituted a significant component of the late prehistoric subsistence economy.
 
The field systems produced large quantities of food to support local farmers and residents, as well as local and district-level chiefly elites.
 
It is generally thought that the dryland agricultural systems had spread to their maximum extent, nearly reaching the edge of productive lands.
 
Kohala supported a large and well-developed field system, covering over 15,000-acres with a dense network of field walls and paved trails.  It is one of the largest archaeological sites in Polynesia.
 
In the Kohala area, Hawaiian farmers found, farmed and intensified production on lands that were poised between being too wet and too dry.
 
The distribution of intensive rain-fed agricultural systems was constrained on its lower end by conditions that were too arid to support intensive agriculture reliably, while at their upper margin many millennia of leaching had depleted soil fertility to a point where intensive rain-fed agriculture was infeasible.
 
In essence, Hawaiians were farming the rock in intensive dryland agricultural systems; their field systems extended to the wettest point that still supplied nutrients via basalt weathering.
 
When the field system is plotted against the rainfall map it falls within the 30-70-in rainfall band.
 
Archaeological evidence of intensive cultivation of sweet potato and other dryland crops is extensive, including walls, terraces, mounds and other features.
 
The fields throughout the Kohala system were oriented parallel to the elevation contours and the walls (and perhaps kō (sugar cane) planted on them) would have functioned as windbreaks from the trade winds which sweep down the slopes of the Kohala mountains.
 
Configured in this way, the walls would also have reduced evapotranspiration and – with heavy mulching – retained essential moisture for the crops.  This alignment of fields also conserved water by retaining and dispersing surface run-off and inhibited wind erosion and soil creep.
 
The main development of the Kohala field system took place AD 1450-1800.  By the late-1600s the lateral expansion of the field system had been reached, and by AD 1800 the system was highly intensified.
 
The process of intensification involved shortened fallow periods, and agricultural plots divided into successively smaller units.
 
The archaeological map of the Kohala field system depicts over 5,400-segments of rock alignments and walls with a total length of nearly 500-miles.
 
The fields begin near the north tip of the island very close to the coast.  The western margin extends southward at an increasing distance from the coast, with the eastern margin at a higher elevation and also an increasing distance from the coast.
 
From north to south the field system is more than 12-miles in length.  At its maximum, it is more than 2.5-miles in width.
 
Scientists speculate that this farming did not just support the local population, but was also used by Kamehameha to feed the thousands of warriors under his command in his conquest of uniting the islands under a single rule in the late-1700s.
 
Based on experimental plantings, if only half of the Kohala Field System was in production in one year, it could be producing between 20,000 to 120,000-tons of sweet potato in one crop.
 
The system was abandoned shortly after European contact in the early- or mid-19th century.
 
The image shows remnants of the Kohala Field System walls in present pastureland.  A special thanks to Peter Vitousek, former Hawai‘i resident and now Professor at Stanford, for background information and images. 
 
© 2023 Ho‘okuleana LLC
 
 

Filed Under: General, Hawaiian Traditions, Place Names Tagged With: Kohala Field System, Hawaii, Kamehameha, Kohala, Field System

March 19, 2017 by Peter T Young Leave a Comment

Increased Population – Increased Production

Kohala on the Island of Hawai‘i was likely settled in its windward valleys about A.D. 1100–1200 and along the leeward shoreline between A.D. 1200 and 1400.

Kamakau noted, in early Hawaiʻi “The parents were masters over their own family group … No man was made chief over another.” Essentially, the extended family was the socio, biological, economic and political unit.

Because each ʻohana (family) was served by a parental haku (master, overseer) and each family was self-sufficient and capable of satisfying its own needs, there was no need for a hierarchal structure.

With such a small (but growing) population based on the family unit, society was not so complicated that it needed chiefs to govern or oversee the general population.

Kamakau states that there were no chiefs in the earliest period of settlement but that they came “several hundred years afterward … when men became numerous.”

Ancient household units in Hawai‘i are represented archaeologically by clusters of small stone and earthen structures, including terraces, enclosures, and small semicircular stone shelters.

The mauka field system was likely established between A.D. 1200 and 1400.

Marion Kelly noted dryland field systems were one of the three noted subsistence production intensification techniques initiated by the early Hawaiians (along with walled fishponds and lo‘i kalo (irrigated, terraced pondfields for taro cultivation)).

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.

In the mauka field system, larger residential features are identifiable by constructed terraces with stout stone walls on the upslope (windward) side of these structures, which served as windbreaks and anchored the perishable thatch hale.

Natural bedrock outcrops were also used for habitation and were modified with abutting stone-faced terraces and stacked stone-wall enclosures.

Archaeological evidence indicates a chronology of household expansion (and, by inference, to population growth, as well as increased managerial presence and a desire to produce higher yields) spanning three temporal periods between A.D. 1400 and 1800.

The overall pattern is one of an exponential rate of increase in residential features, with the greatest number of such features existing in temporal period 3 (A.D. 1650–1800), just before European contact.

The pattern of early expansive construction (the phase 1 alignments and trails) indicates that the area was developed over time as farmers established new fields and farmsteads.

During phase 2, additional residential clusters were established, and the ahupua‘a was subdivided with new agricultural alignments inserted predominantly between the new residences and trails.

The lands were progressively subdivided with new trails and alignments (such as phase 3 constructions), as preexisting territorial segments were carved into smaller units.

This chronology fits well with the previously established chronology of agricultural system intensification which shows a pattern of late intensification (marked by increased field alignment construction) after A.D. 1650.

Archaeological evidence of intensive cultivation of sweet potato and other dryland crops is extensive, including walls, terraces, mounds and other features.

The fields throughout the Kohala system were oriented parallel to the elevation contours and the walls (and perhaps kō (sugar cane) planted on them) would have functioned as windbreaks from the trade winds which sweep down the slopes of the Kohala mountains.

Configured in this way, the walls would also have reduced evapotranspiration and – with heavy mulching – retained essential moisture for the crops. This alignment of fields also conserved water by retaining and dispersing surface run-off and inhibited wind erosion and soil creep.

The main development of the Kohala field system took place AD 1450-1800. By the late-1600s the lateral expansion of the field system had been reached, and by AD 1800 the system was highly intensified.

The process of intensification involved shortened fallow periods, and agricultural plots divided into successively smaller units.

The archaeological map of the Kohala field system depicts over 5,400-segments of rock alignments and walls with a total length of nearly 500-miles.

The fields begin near the north tip of the island very close to the coast. The western margin extends southward at an increasing distance from the coast, with the eastern margin at a higher elevation and also an increasing distance from the coast.

From north to south the field system is more than 12-miles in length. At its maximum, it is more than 2.5-miles in width.

Scientists speculate that this farming did not just support the local population, but was also used by Kamehameha to feed the thousands of warriors under his command in his conquest of uniting the islands under a single rule.

Based on experimental plantings, if only half of the Kohala Field System was in production in one year, it could be producing between 20,000 to 120,000-tons of sweet potato in one crop.

Archaeologists conclude that the higher frequency of residences within the core area of the field system, as well as the initial expansion of field system trails and alignments that demarcate major land divisions, suggests that this process was managed from the outset.

On the basis of ethnohistoric documents from the 18th and 19th centuries, they note that such management was performed by elites, who were required to generate surplus at the level of the ahupua‘a.

Population growth, coupled with increased management and tribute requirements, supported the increasingly hierarchical sociopolitical system of archaic states that emerged in Hawai‘i ca. A.D. 1600–1800

The system was abandoned shortly after European contact in the early- or mid-19th century. (Lots of information here is from Field and Kirch.)

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Filed Under: Ali'i / Chiefs / Governance, Hawaiian Traditions, Place Names Tagged With: Hawaii, Kohala, Kohala Field System

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