I still don't understand what trumps plan was with trying to punish brazil with import tariffs, brazil's exports depend more on china who is going to probably eager to buy more, if anything it would more of an effective idea to tariff exports or outright ban exports of things brazil needs to for its animal and plant production, like disallow exporting USA made breeds of animals and plants, banning investment in brazils agriculture sector, banning fertilzer exports to brazil and export of agricultural machines to brazil.

Threats to tariff brazil's export if anything push Brazil to depend more China, further pushing it away from USA's influence

Brazil is highly dependent on fertilizer exports and agricultural machinery imports, as a student in a university in a course related to agriculture, I see USA made tractors daily, Brazil's program to develop its own breeds of animals and plants for production is nowhere near as developed as USA's, and although USA's breeds often are not well adapted to Brazil's climate they are often the few ones avaible that are viable commercially in a few key sectors