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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.
1 Ground surface is exposed to the solar radiation effect to the certain depth. The intensity of. solar radiation is different because of geographic location, morphology and plant diversity. Ground temperature is generally a function of solar heat transferred by radiation, convection. and conduction.