Mato Grosso, Brazil's biggest grains state, has clamped down on the practice of planting soybeans as a second crop in an effort to control disease, especially Asian rust.
Under new rules published in the state's official register Thursday, farmers will only be allowed to plant soybeans between Sep. 16 and Dec. 31 and all beans must be harvested by May 5.
The ban on planting a second crop of soybeans, known locally as a 'safrinha,' immediately after a summer crop also remains in place.
The measure will not affect Mato Grosso's productive capacity. Second-crop planted area is only 250,000 acres ...