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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.
Light colored surfaces reflect a large amount of solar radiation.On the surface of the ground, solar radiation is reflectedback into the atmosphere. In a confined space, such as a solar box cooker, solar radiation can be reflectedagainst other surfaces, as shown below. This type of heat transfer is called radiation.Solar radiation reflected and absorbed Heat is mainly transferred through conduction and convection.owever, heat can also be lost via conduction through the bottom of the cooker. To reduce this, a plate with spacers can be added to the bottom of the box. Conduction Radiation While most of the radiation in a solar cooker comes from the sun, the interior of the box, pots, and bottom plates, also radiate heat.