Light environment: Radiation balance, Quality and quantity of solar energy, Penetration of radiation and light absorption in crop canopies; Temperature relations of soils and plants: Soil heat flux and thermal properties of soil, Diurnal and seasonal pattern and profile of soil temperature, Temperature profile above natural surface, Sensible heat transfer in the atmosphere, Temperature pro-file in plant canopies; Water relations of plants and soils: Energy balance and water balance, Atmospheric humidity, Evaporation and Evapotranspiration, Ecology of dryland, wet-land and flooded ecosystems; Wind: Effects on crop growth, Atmospheric stability, Wind profiles over the growing crops, Wind breaks and shelter effects on crop production; Fire: Kinds, direct and indirect effects, ecological implications of fire on vegetation and crop production; Topography: Effects of altitude, latitude, slope and aspects on crop production.
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