Research shows soil in the quarry where the figures came from was highly fertile.
The ancient Rapa Nui civilization may have created the Easter Island statues because they believed these monoliths made the soil more fertile, improving crop production, researchers have said., an international team of researchers say analysis of statues located within a quarry on Easter Island shows this soil was particularly fertile, and that the civilization appears to have used it to grow banana, sweet potato and taro.There are almost 1,000 statues across Easter Island.
In the latest research, Sarah Sherwood, from the University of the South, Sewanee, and colleagues, have looked at the soil quality in a key area of the island—Rano Raraku quarry. Analysis indicates that sweet potato, banana, taro, paper mulberry and possible bottle gourd were all planted at the site. Researchers believe that the constant movement of land associated with quarrying probably increased the fertility of the soil in this part of the island.
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