In temperate regions of the world where decomposition is slow, a lot of organic debris accumulates in the soil, while in tropical and subtropical regions, hot, humid conditions cause rapid decomposition and mineralization of the soil. organic matter (Nelson and Sommers 1996)(iii) Soil water/moisture obtained from the atmosphere and reactions in the soil (chemical, physical and microbial). Water is another major component of soil which can make up approximately 2-50% of soil volume (Nelson and Sommers, 1996). It is essential for transporting nutrients to growing plants and soil organisms and also for facilitating biological and chemical decomposition. Soil water availability is the ability of a particular soil to hold water available to plants (Gardner et al., 2000). Soil water is important for three particular reasons: • Water availability is essential for all life on earth; this includes the life of plants and organisms in the soil (Gardner et al..,