temperature and plant growth
Soil micro-organisms show maximum growth and activity at
optimum soil temperature range. All crops practically
slow down their growth below the temperature of about 90C
and above the temperature of about 500 C. The
biological processes for nutrient transformation and
nutrient availability are controlled by soil temperature
and soil moisture. Soil temperature has a profound
influence on seed germination, root and shoot growth,
and nutrient uptake and crop growth. Seeds do not
germinate below or above a certain range of temperature
but Micro-organisms functioning in the soil are very
active while a certain range of temperature, which is
about 270 to 320C. It is necessary
to know whether the soil temperature is helpful to the
activities of plants and micro-organisms and the
temperature could be suitably controlled and modified.
The various factors that control the soil temperature
are soil moisture, soil colour, slope of the land,
vegetative cover and general soil tilth. Aeration can be
used to control soil temperature, regulate soil
moisture, improve drainage, stimulate microbial activity
and improve overall soil tilth.
CHEMICAL FERTILIZER vs
|Crop Year: 2002
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