Definition  Phytogeography is the study of distribution of plant species and elucidation of origin of flora. The relative position of the 6 continental land masses and large number of islands play an important role in the distribution of various types of plants over the surface of the earth.   Factors …

Components of Water Budget The water budget of a unit area of the earth’s surface is formed from the components: P = precipitation E = Evaporation D = Discharge, Runoff R = Reserve, storage and U = Use, consumption The conservation law for water satisfies the water balance. P = …

Geosphere The area near the surface of the earth can be divided into four inter-connected “geo-spheres” – lithosphere, hydrosphere, biosphere and atmosphere. The names of the four spheres are derived from the Greek words for stone (litho), air (atmo), water (hydro), and life (bio).   Lithosphere The lithosphere is the …