Radiant energy 3 Aeration of soil 1 Atmosphere 1 Biological clock 1 Carbohydrate synthesis 1 Carbon Dioxide Fixation 1 Ecology 1 Environment 1 Environmental physiology 1 Enzymes 1 Hormones and growth 1 Lipids 1 Osmosis 1 Photomorphogenesis 1 Photoperiodism 1 Photosynthesis 1 Plant Physiology 1 Plant biochemistry 1 Plant physiology, Light, Radiant energy, daylight and artificial light, metabolic transduction and amplification of light signals, growth and development:phoyomorphogenesis, orientation in space: Phototropism, photoperiodism 1 Plants and light 1 Proteins 1 Solid phase of soil as the basis of its physical regime 1 Stress physiology 1 Transformation of radiant energy on an active surface and its thermal balance 1 Water in soil 1 actinometric measurement radiation-absorption 1 earth science 1 radiant energy 1 radiation-deffuse 1 radiation-global radiation-thermal 1