ABSTRACT
A Solar radiation is the main source of energy for photosynthesis. Because leaf angle mutual shading reduces the actual irradiation of individual leaf considering strong relation between light intensity and DMP. Conversion coefficient is quantity of DM produced/unit of light intercepted and also referred to as light use efficiency or radiation use efficiency. The impression of green color of plants depends on high reflectivity of solar radiation and greater sensitivity of human eye for green color. Methane has increased at an average of 0.8% per year in the last 20 years and it is provided by the process such as Methane is also destroyed by chemical reaction caused by UV sunlight involving very active hydroxyl radicals. Although it is responsible for only small percentage of direct greenhouse warming, they have indirect influence on plant growth. Warming temperatures associated with climate change will affect plant growth and development along with crop yield.
