The table illustrates information about the quantity of different types of grains produced from 2010 to 2015, with projections until 2030.
From the table, it was obvious that wheat is the leading grain crop over the years, followed by barley, maize and rice. The production of wheat rose from 100 million metric tons in 2010 to 105 million metric tons in 2015, and this figure is expected to continue rising until 110 million metric tons in 2030. Besides that, the quantity of barley harvested increased dramatically by 20 million metric tons from 2010 to 2015, and the production of barley will increase by 10 million metric tons to 100 million metric tons by 2030. Moreover, the maize and rice productions climbed at a relatively slow rate from 2010 to 2030. The production of maize increased by solely 0.5 million metric tons from 34 million metric tons in 2010 to 34.5 million metric tons in 2015, and it is predicted that there will be no increment of maize production five years later. After 2020, the maize harvest will expand slightly to 35 million metric tons until 2030. Different from the other grains, the production of rice declined by 0.4 million metric tons from 24.7 million metric tons in 2010 to 24.3 million metric tons in 2015. The yield, however, is estimated to climb at a fairly slow rate between 0.2 to 0.5 million metric tons until 2030.
Overall, the production of wheat was the highest while that of rice was the lowest from 2010 to 2015, with the same ranking of production quantity until 2030.