In recent years world grain output has fluctuated. For example, the output of cereals in 1987 and 1988 decreased to 1.7 billion tons from an earlier peak of over 1.8 billion tons in the mid-1980s,...
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In recent years world grain output has fluctuated. For example, the output of cereals in 1987 and 1988 decreased to 1.7 billion tons from an earlier peak of over 1.8 billion tons in the mid-1980s,...