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Note that it is calibrated in tenths of a degree Celsius and that even that tiny amount of warming started long before the late 20th century.
The grasses in the Stanford experiment showed little response to enhanced CO2 because the soil in the area was phosphorous deficient -- and that stopped the plants from taking much advantage of the other growth factors. There is nothing in the experiment to upset the thousands of studies that show high levels of CO2 enhancing growth. In their desperation to show corroboration for the badly implemented Stanford study, they quote a study of corn growth in France.
But that study showed an adverse effect of high temperature, not high levels of CO2. All plants do have a temperature range within which they function best so it is no surprise that the corn cultivars mostly used in France were adversely affected by unusually high temperatures.
Corn grows in a lot of quite warm areas in Latin America and India so it is just a matter of choosing the right cultivar for the climate.
In some places the optimum temperature for maize (corn) germination is given as 33 degrees C! And the prophecy about wheat yields is just modelling, and we know how good Warmist models are.
But wheat cultivars vary too so again the only potential challenge posed by a temperature change as small as one degree would be to choose the right cultivar And in the grand tradition of Green/Left cherry picking, the crooks below ignore the other effects that a temperature rise would bring -- in particular the larger area that would become available for cropping.
Canadian wheat farmers are enormously productive despite farming right up to where the cold limits them.
A temperature rise would open up vast new areas of croplands for them -- leading to glut rather than any shortage of grain crops A new study by scientists at Stanford University, published in the Proceedings of the National Academy of Sciences, tested whether hotter temperatures and higher carbon dioxide levels that we’ll see post-2050 will benefit the kinds of plants that live in California grasslands.
They found that carbon dioxide at higher levels than today (400 ppm) did not significantly change plant growth, while higher temperatures had a negative effect.
The oversimplified myth of ‘CO2 is plant food’ Those who benefit from the status quo of burning copious amounts of fossil fuels love to argue that more carbon dioxide in the atmosphere will benefit plant life.
It’s a favorite claim of climate contrarians like Matt Ridley and Rupert Murdoch.
It seems like a great counter-argument to the fact that carbon dioxide is a dangerous pollutant – a fact that contrarians often dispute.Tags: Adult Dating, affair dating, sex dating