I wasn’t able to retrieve the specific details you requested about changes in agricultural prices and quantities in South America. However, in general, South American agriculture has seen significant price fluctuations due to factors like weather patterns (droughts or floods), changes in demand, and supply chain disruptions. Additionally, global market trends, including fluctuations in commodities like soybeans, corn, and coffee, have also impacted agricultural prices. Economic policies, trade agreements, and currency fluctuations in countries like Brazil, Argentina, and Paraguay also influence these changes.If you’re looking for more specific data or trends from a particular country or region, feel free to let me know!