The rate of infiltration normally declines rapidly during the early part of rainstorm event and reaches a constant value after several hours of rainfall. The factors responsible for this phenomenon are the filling of fine soil pores with water, which reduces capillary forces moistened soil, clay particles to swell and reduce the size of pores raindrop impact breaking up with soil clumps, splashing fine particles into pores
Options: because of desiccation and mechanical damage to the tissues, because no photosynthesis takes place at such low temperature, because respiration ceases at such low temperature, because there is no transpiration
Which of the following are the members of SAARC (South Asian Association for Regional Cooperation)?
Options: Bhutan, Bangladesh, India and Pakistan, Bhutan, Bangladesh, the Maldives, Nepal, India, Pakistan, Afghanistan and Sri Lanka, Afghanistan, Pakistan, Thailand, Indonesia, Nepal and Sri Lanka, None of the above
On a night when the sky is clear, the temperature may dip considerably; on a cloudy night the temperature will usually dip much less. The reason for this difference is that
Options: the clear sky allows radiant energy to escape readily from the earth, on a cloudy night the clouds are warm and therefore retard the cooling, the clear sky allows the cold of outer space to reach the earth, current of air carry the heat away from the earth on a clear night