Not only is this entirely possible but it has already happened once in this country. In the early 1950´s general Juan D Peron nationalized all food exports to Europe.
He created a huge monster called Junta Nacional de Granos which monopolised food and grain trade here. It is true that he got better prices for them, but the goverment kept the lion´s share of the income. This is exactly what our queen wants to do: not collective farms, but slaves that work all year around (in the rain, cold, or heat) so she will collect ALL the profits to be used in new demagogic, but vote-collecting programs.
If this happens, it is possible that a civil war may erupt; I would advise all expats to start making moves to Chile or Uruguay at the first sight of trouble.
Let´s not forget that the farmers are the only armed people in this country, and the Ejercito Argentino will not repress them to defend a goverment that has insulted, persecuted and humiliated our armed forces. Any more clear?.