Questions about corn acreage
“Acreage harvested for silage, however, tends to spike in years of dry weather like that of 2012,” Good said. “Compared to the previous year, for example, silage acreage increased by 1.3 million acres in 1980, 2.3 million acres in 1988, and just over one million acres in 2002. This ‘spike’ pattern was not observed in 1983 or 1995, however, when harvested acreage of silage was less than in the previous year,” he said.
In the case of non-harvested acreage, Good reported an increase from the previous year of 780,000 acres that occurred in 1980, 460,000 in 1988, 258,000 in 1995, and 1.65 million in 2002. The outlier in the pattern of an increase in acreage not harvested for grain in recent dry years was 1983. The pattern that year may have been influenced by the 21.6 million acre year-over-year decline in planted acreage in response to government programs aimed at reducing the corn surplus, according to Good.
So what about harvested acreage of corn in 2012?
“We are anticipating that due to the severity of this year’s drought, the difference between planted acreage and acreage harvested for grain will be at least as large as in 1980, 1988, and 2002,” Good said. “Differences in those years averaged 10 million acres, in a range of 9.47 to 11.1 million acres. If planted acreage was also slightly less than the NASS June estimate, that experience points to acreage harvested for grain of about 86 million, nearly 1.4 million less than the June NASS estimate,” he said.
Under this acreage scenario, Good said a national average corn yield near the August forecast of 123.4 bushels would result in a crop near 10.6 billion bushels.
“If the average yield is also 4 to 5 bushels lower than the August forecast, as we suspect, the crop may be near 10.2 billion bushels, almost 600 million bushels less than the NASS August forecast,” Good said. “A crop of that size would require a year-over-year decline in consumption of U.S. corn of nearly 1.8 billion bushels, or about 14 percent.
“Corn prices would likely have to remain high for an extended period in order to motivate such a large decline in consumption,” Good said. “The USDA’s Sept. 12 Crop Production report will provide an important update on the likely magnitude of harvested acreage, yield, and production, and bring the rationing question into clearer focus,” he said.
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