Dave Burton@ncdave4life
Dave BurtonNov 6, 2023
11 tweets
1/10. Where on earth do you "learn" such nonsense, Willard?
Growing ranges for most major crops cover climate zones with average temperatures that vary by tens of °C. Major crops like corn, wheat, potatoes & soybeans are produced from Mexico to Canada.
Compared to that, a degree or two of warming (disproportionately at night, in winter, at chilly high latitudes) is de minimis -- as is the 0.35±0.13°C between now and what the IPCC calls "1.5°C of warming").
2/10. Willard wrote, "fertilization is the male gamete to female gamete to produce seed/fruit... not the N-P-K addition"
Wrong. In agriculture, that's called pollination.
3/10. Willard wrote, "(yes, it is often temperature sensitive)"
Wrong. Farmers choose planting dates to optimize growing conditions, including temperatures, for their crops.
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Dave Burton@ncdave4life
Dave BurtonOct 28 23
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18/25. In the American Midwest, farmers can fully compensate for a 1°C temperature change by adjusting planting dates by about six days.
4/10. If you think cold weather is better for crops than hot weather, then why do you think farmers plant in the spring instead of the fall?
5/10. Willard wrote, "Don't forget the negatives"
There are no "negatives" of any consequence from higher CO2 levels.
Higher CO2 levels are highly beneficial for agriculture.
6/10. Willard wrote, "High temps impact soil moisture levels, evapotranspiration"
If you're worried about soil moisture levels and evapotranspiration, then why do you ignore the fact that higher CO2 levels improve crops' water use efficiency and drought resistance?
7/10. Here's a paper:
nature.com/articles/s4146
Cheng L et al (2017). Recent increases in terrestrial carbon uptake at little cost to the water cycle. Nat Commun 8, 110 (2017). doi:10.1038/s41467-017-00114-5
It reports that…
8/10. "Land plants are absorbing 17% more carbon dioxide from the atmosphere now than 30 years ago… [yet] the vegetation is hardly using any extra water… suggesting that global change is causing the world's plants to grow in a more water-efficient way."
theconversation.com/rising-carbon-
8.1/10. Aside: for agricultural plants, carbon absorption is roughly proportional to crop yield, so a +17% increase in carbon uptake from a mere 55 ppmv (16%) rise in CO2 level strongly suggests that crop yield improvements from elevated CO2 are much greater than the +20% conservative estimate which I previously mentioned.
9/10. Here's a paper about wheat:
onlinelibrary.wiley.com/doi/full/10.11
Fitzgerald et al. (2016) Elevated atmospheric [CO2] can dramatically increase wheat yields in semi-arid environments and buffer against heat waves. Glob Chang Biol. 22(6):2269-84.
10/10. If you ever decide that you want to learn about these things, I have some good resources cataloged here:
sealevel.info/learnmore.html
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Dave Burton@ncdave4life
Dave BurtonNov 03 23
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7/7. The science has been settled for over a century: elevated CO2 is tremendously beneficial for agriculture. The climate activists who refuse to acknowledge that established fact are science deniers.
sealevel.info/learnmore.html
Dave Burton
Dave Burton@ncdave4life
My preferred pronoun is "harmless data drudge." https://t.co/YTkK6vaHGs Tel: +1 919-481-0098.
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