Enumerate the ratio of rainfall to temperature

The effect of climatic agents on the changes taking place in the parent material is determined by the ratio of rainfall to temperature. A high rainfall coupled with low temperature, giving a wide ratio, brings about more dissolution and more leaching.  By keeping the atmosphere more humid, it checks evaporation.  It brings about an accumulation of humus.  A low rainfall coupled with high temperature, giving a narrow ratio, on the other hand brings about more evaporation and keeps the atmosphere dry.  Leaching and eluviation are restricted and salts are precipitated from their solutions.  They either accumulate where they are deposited into lower layers or are brought to or near the surface by the upward movement of water