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The effect of total solar. radiation on nutrient concentration (mean values for 11 chrysanthemum cultivars) is. summarized in Figs 2â9. The increase of radiation (in MJ m-2) caused decreased. concentration of nitrogen, phosphorus, potassium, calcium, magnesium, cuprum and. boron in chrysanthemum leaves.
As solar radiation varies in intensity, it can be expected to periodically also warm the earth's oceans, releasing dissolved carbon dioxide and melting methane hydrates -- the release of which have always accompanied all previous warming periods for millions of years.