Nobody said the weather had no impact, which is clear from reading the fact based article I provided, for your education. Straw man is useless...
LOL, if this is the manner of your "education," I would demand a tutition refund, if I were you.
The eight best harvest, despite a terrible year for rain, and really bad heat.
How does the ratio of crop yeild to acreage cultivated compare to those other seven years?
It shows how people who actually produce something ignore authors who try to sell books (and themselves it seems) by scaring weak minds.
Or, it shows how if you select your data carefully enough, looking only for that which you can misrepresent and exaggerate, while ignoring the overwhelming majority of data and trends, you can spin, twist and contort support for virtually any fringe construction your disconnected from reality ideology requires,...see the 9/11 "no-plane" conspiracies for a good example of such.
The worst economic losses in US history have been from record cold, not record heat.
And basketball scores are generally higher than football scores. Comparing apples to oranges generally isn't a very productive effort when trying to estimate apple yeilds.
It seems some people think a part of the US cornbelt is the only place that matters.
boy howdy, look at them goalposts sprint!!
Then you won't succumb to irrational fears from some nobody, who offers no facts, just opinions.
You shouldn't be so hard on yourself, you aren't alone in your misunderstandings.
China's harvests are increasing because they are cultivating more acres, not because yeilds per acre are increasing.
http://www.ers.usda.gov/ImageGen.ashx?image=/media/985529/china_corn__2_.png&width=450
http://cornandsoybeandigest.com/corn/crop-production-2012-summary-corn-13-below-2011-soybeans-down-3
And beyond issues of the crops actually harvested comes concern about how much of the harvested yeild is actually usable:
"Fortified by Global Warming, Deadly Fungus Poisons Corn Crops, Causes Cancer" -
http://www.scientificamerican.com/article.cfm?id=deadly-fungus-poisons-corn-crops
...Last year’s drought increased the spread of a carcinogenic mold called aspergillus (Aspergillus flavus), a fungal pathogen that poisons cattle, kills pets and has infected the 2012 corn crop, rendering significant portions of the harvest unfit for consumption.
Whereas the deadly organism mainly affects countries like China and developing African nations, many U.S. states have experienced an increase in corn contamination since 2011. Farmers are likely to see more of the carcinogen as temperatures continue to rise and droughts become more frequent...
(please read entire (short) article at link)