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Sistema de riego del Río Dulce, Santiago del Estero, Argentina. Brecha de rendimientos y productividad del agua en los cultivos de maíz y algodón
(Universidad de Córdoba, UCOPress, 2016)
Seventy percent of the Planet Earth´surface is covered by water. However, only 2.5% is
fresh water, the remaining 97.5% is salt water in oceans and seas. From 2.5% of freshwater,
only 0.3% is available in rivers, lakes ...