Soybeans are seen at the back of a harvester at a field in the city of Chacabuco
Soybeans are seen at the back of a harvester at a field in the city of Chacabuco April 24, 2013. Food demand is rising and the South American country is a natural grains exporter. Yet farm revenue is falling across the Pampas while soy yields stagnate due to high inflation and lack of crop rotation needed to maintain healthy soils. To match Analysis ARGENTINA-SOY/ REUTERS/Enrique Marcarian (ARGENTINA - Tags: AGRICULTURE BUSINESS)