Waru Waru

Long ago, people in South America made special farms.

They made long rows of soil. These rows sit high above water paths.

The water in the paths catches sun heat. This heat keeps the plants warm at night. It stops the cold from hurting the crops. These farms also help plants get food from the soil. This way, people can grow much more food. It is a very smart way to farm.

Long ago in South America, people made a smart way to farm. They used a system called Waru Waru.

This method uses long, raised beds of soil. These beds sit between narrow paths of water.

These water paths are also called canals.

This way of farming helps in many ways. The canals bring water to the plants. This is called irrigation. The canals also help drain water away during big floods. The water in the canals catches heat from the sun. At night, this heat keeps the plants warm. This stops the frost from hurting the crops.

The soil in the beds is very rich. It gets nutrients from plants that grow in the water. This makes the soil good for growing food like potatoes and quinoa. These fields even attract fish and birds.

People used this method a long time ago. It is linked to the Tiwanaku culture. Today, many people are using Waru Waru again. It helps them farm in hard places like the Amazon basin. It is a great way to grow food without cutting down trees.

Waru Waru is a clever way to farm in South America. It uses long, raised beds of soil next to narrow paths of water.

These paths are called canals. People build them near water sources or on flat plains. This method helps farmers grow much more food than other ways. It is very useful in places that face big floods. The canals can drain extra water away quickly.

This system works by using nature to help the plants. The canals act as a way to water the crops. This is called irrigation. The soil in the raised beds becomes very rich and healthy. It gets nutrients from plants and organic matter in the water. This creates a natural fertilizer for the crops. The canals also catch heat from the sun during the day. At night, this heat keeps the plants warm. This helps stop the frost from freezing the crops.

Ancient people first used this method a long time ago. Some evidence shows it was used as far back as 1000 B.C. It is often linked to the Tiwanaku culture. These people lived near Lake Titicaca in the Andes mountains. They used Waru Waru to grow food like potatoes and quinoa. The fields were large, wide, and tall. They helped support very large groups of people for a long time.

Many interesting facts come from studying these old fields. These fields sit at high altitudes above 3,800 meters. In the northern altiplano of Bolivia, researchers studied the soil temperature. They found the raised beds were about 1 degree Celsius warmer than the ground. This small change helped protect potato crops from the cold. These fields also create new homes for animals. They attract fish and birds to the water canals.

Today, people are bringing Waru Waru back to life. In the 1960s, researchers found these fields in the Amazon basin. They started experiments in 1990 at a station in Bolivia. These projects helped grow crops like maize and manioc. Now, Aymara- and Quechua-speaking people use this method again. It allows them to farm in hard places without modern machines. It also helps them farm without cutting down forests.

Waru Waru is a sophisticated system of raised field agriculture. This technique was developed by pre-Hispanic people in the Andes region of South America. It stretches from Ecuador to Bolivia. In Spanish, these fields are often called camellones. This method uses parallel canals that alternate with raised planting beds. These beds are placed on floodplains or near water sources. This placement ensures the crops receive proper irrigation.

The mechanism of Waru Waru relies on a cycle of water and nutrients. The adjacent canals provide efficient irrigation for the raised beds. This constant water supply extends the growing season significantly. It also allows for a much higher food yield. The soil in the beds becomes very rich in nutrients. This happens because aquatic plants and organic materials collect in the canals. Farmers mound this nutrient-rich soil to create the planting beds. This process provides a natural, recyclable fertilizer. This is vital in regions where nitrogen-rich soils are rare.

Beyond nutrients, the system manages temperature and water flow. The canals capture solar radiation during the daytime. At night, this stored heat protects crops from freezing. This process is known as frost mitigation. The system also handles water levels through drainage and collection. It can collect rainwater, fluvial water, or phreatic water. The drainage aspect is very important during brutal floods. This makes the technique useful in the tropical parts of Bolivia and Peru.

History shows that Waru Waru is an ancient technology. It dates back to approximately 300 B.C. The method is most commonly linked to the Tiwanaku culture. These people lived in the Lake Titicaca region of southern Bolivia. They used these fields to grow essential crops like potatoes and quinoa. Some evidence suggests usage occurred between 1000 B.C. and A.D. 400. Radiocarbon dating and thermoluminescence dating of pottery shards support these dates. The fields are generally wide, long, and tall.

The significance of this system is seen in its scale and impact. These pre-Hispanic fields cover large areas of land in Bolivia and Peru. They are located at altitudes above 3,800 meters. Habitation sites near the fields suggest they supported large populations. This indicates the agriculture could sustain long-term occupations. Research in the northern altiplano of Bolivia has confirmed its effectiveness. Scientists found that soil on the mounds was about 1 degree Celsius warmer than nearby ground. This temperature difference helped protect potato crops from overnight frost.

Interestingly, Waru Waru creates its own artificial ecosystems. The water in the canals attracts various food sources. These include fish and lake birds. Past cultures in the Lake Titicaca region likely used these animals for subsistence. Similar raised-field methods have appeared in other parts of the world. For example, the Mexican Chinampas were created near water sources to irrigate crops. Raised fields have also been found in Belize at sites like Pulltrouser Swamp.

Today, there is a modern resurgence of this ancient practice. In the 1960s, geographers discovered evidence of these fields in the Llanos de Moxos. This is a region in the Bolivian Amazon basin. In 1990, an experimental archaeology project began in Bolivia. This project involved several organizations, including the University of Pennsylvania Museum of Archaeology and Anthropology. The experiment successfully produced crops like maize and manioc. These plots became self-sufficient through their artificial ecosystems. Now, Aymara- and Quechua-speaking indigenous peoples use the technique again. It allows for large-scale farming in the Amazon without needing deforestation. It also helps people farm difficult landscapes without modern equipment.