Brazil goes from 1,700 hectares to 87.2 million hectares since the 1970s.
Southern Brazilian producer changes crop mix to more soy, less corn.
Rain scheduled to hit Brazil’s Center-North this week.
But precipitation good in Parana.
Wet Argentina to plant less soy; Brazilian acreage up modestly.
Brazil slaps quarterly quotas, tariffs on imported ethanol.
Expert says much of increase to come from soy yield gains.
Weather maps show Brazilian soils drier than usual as planting season nears.
Just 60% of crop inputs have been purchased for upcoming planting season.
Brazilian government needs the money to fund services.