Red Baron Farms
Philosopher
Field study shows why food quality will suffer with rising carbon dioxide
http://phys.org/news/2014-04-field-food-quality-carbon-dioxide.html
On the other hand
Potatoes could step up performance under climate change pressure
http://phys.org/news/2014-02-potatoes-climate-pressure.html#inlRlv
That's dry matter yield, no mention of protein. So there could be more carbohydrate (CO2 is plant food) but less protein. Not good for a balanced diet.
So more uncertainty (which is not our friend) and a new front opened in AGW denier territory (the aforementioned plant-food slogan). It must feel like the walls are closing in on them.
It is interesting to note this later:
Which of course shows the inherent bias and flaw in the analysis. It is a study of conventional agricultural methods only. Haber process nitrogen as opposed to self regulating biological systems. The problem of increased yield at the expense of nutritional quality is already a well documented phenomenon of conventional agricultural systems. Except the yield gains are an illusion and temporary. Don't expect the gains will last. They can't.While heavy nitrogen fertilization could partially compensate for this decline in food quality, it would also have negative consequences including higher costs, more nitrate leaching into groundwater and increased emissions of the greenhouse gas nitrous oxide, he said.
The only way to get gains in productivity AND quality that last is by restoring the biology in the soil. (soil health) The advantage of that is...the excess CO2 is actually turned to sugars and secreted into the soil to feed the symbiotic biology there, in exchange that symbiotic biology provides the plant with the proper optimized nutrient balance for BOTH yields and quality. In that case the increased atmospheric CO2 will both increase yields AND protein content. AND since the mode of action is by secreting carbon deep in the soil rhizosphere, the long term side effect of this is sequestering carbon. Beneficial to both the soil and the atmosphere. Conventional agriculture is a carbon emissions source, not a carbon sequestration sink. Change the agricultural model and the whole food production ball game changes with respect to AGW.
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