O Soybeans fell 1.6% in the week, to $ 323.72 per tonne in the Chicago market. Meanwhile, corn lost 1.6% to $ 143.60 and wheat fell 1.4% to $ 186.20.
This Friday, soybeans fell 0.2% and corn 0.8%, while wheat grew 0.2%.
On Wednesday, Soja's January contract rose 0.2% as traders optimistic about a possible advance in resolving the trade dispute between the United States and China.
"Operators are hoping that US President Donald Trump and Chinese President Xi Jinping will promote a trade agreement at a meeting scheduled for Buenos Aires later this month when the G20 leaders' , indicated on the Rosario Stock Exchange (BCR).
China, the world's top soybean buyer, has imposed tariffs on the US oil company in retaliation for import tariffs implemented by the US for the Asian giant's products.
This situation "has disrupted (bean) trade, threatening to leave abundant production stored or even uncollected in the United States," the BCR added.
Oil followed the soybean increase with an increase in contract value closer to 1.67% to close at $ 612.9 a ton, while flour dropped 0.17% to $ 338 a ton.
On the other hand, wheat fell 0.40% to $ 183.3 per tonne, due to the lack of demand for grains in the US in the global market.
On the other hand, corn rose 0.14% and closed its operations at US $ 142.4 a ton, thanks to technical purchases of investment funds.