Climatic factors :
a) Solar Radiation: Solar radiation serves as the source of light and heat in the global ecosystem and has thermal, photosynthetic, photo periodic, and other effects on plant production in the farming system.
b) Temperature: Temperature regulates and controls vital biochemical processes on which the growth, development, and finally yield depend. Most of the plants grow and develop at the temperature around 5-45 0C above and below which the plant growth is hindered.
c) Light: Light intensity influences the production and activities of enzymes regulating photosynthesis. It affects the development of photosynthetic apparatus, pigmentation, leaf characteristics, growth, and yield formation.
d) Precipitation: Yield levels are determined by the amount of precipitation above the basic minimum required to enable the crop to achieve maturity.
e) Relative humidity: RH influences the water relations of the plant and indirectly affects photosynthesis, leaf growth, pollination, the occurrence of disease, and finally economic yield.
f) Air movement: Wind increases the supply of CO2 to the plants resulting in a higher photosynthetic rate. High wind causes a high rate of transpiration and a reduction in plant height due to a reduction in cell expansion as the cells can’t attain full turgidity.
