This document presents the design and evaluation of a rain simulator to study soil losses and runoff generation in erosion plots located in hilly bared soil.

UNESCO: AQUATACAMA

Phase II, planned for 2011, will identify both aquifers down to 3, 000 meters below the surface, study soil composition and aquifer replenishment, and prioritize areas for agricultural development.

UNESCO: launches initiative to identify groundwater and alleviate water shortages in Iraq | United Nations Educational, Scientific and Cultural Organization

But the Soil Association said the study was flawed.

BBC: Organic food 'not any healthier'

The developed equipment is easy to use, and has a lower cost, so allowed the execution of the multiple field experiments necessary to obtain good and valuable information to study the runoff generation and soil losses processes.

UNESCO: AQUATACAMA

Lehmann, the lead author of the paper which is published in the journal Nature Geosciences, said that the black carbon content of soils in the study ranged from zero to 82 percent of soil organic carbon.

CNN: Soil study hints at climate model revision