May 31 2016: The conference organized by Geographical Institute, Research Centre for Astronomy and Earth…
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What makes soils hungry and sick?
Virgin soils under forest, bush or grasslands have a lot of organic matter. This rich, black material has built up over many years. It is very fertile. When farmers clear the natural vegetation, they at first get very good yields.
But ploughing the land and removing the crop residue leaves the land bare. The plant nutrients are washed away. The fine particles, clay and valuable organic matter are eroded first, leaving a poor, hungry soil.