It has the largest water holding capacity which helps to absorb water during the rain and helps in reducing soil erosion (Genna Dunjo Denti,2004, p.125).
Soil aggregates are group of soil particles that are bonded together strongly to each other than to the adjacent particles with the help of organic matter. The space between the aggregates provides pore space for retention and exchange of air and water. Desirable aggregates are stable against rainfall. When less organic matter is used to bind these aggregates, due to rainfall these aggregates break down and leads to soil crust formation, this crust in turn increases the infiltration and air permeability, this in turn disturbs the surface soil and sub-soil structure. Thus inclusion of organic matter aids in the formation of stable aggregates and strengthen them. They also increase the porosity of the soil for air and water movement. Thus aggregating helps in reducing soil erosion.
As the strength aggregates depends on the organic matter, since the organic matter acts as a binder to the aggregates. Hence weakening of this bond due to frequent tillage ultimately breaks down the aggregate structure of surface soil (Rachman, Anderson, Gantzer and Thompson, 2004, p. 31).
Splash erosion is the removal of sand by impact of raindrops on the soil surface, this is also known as soil splash detachment (Jean Poesen, Gerard Govers(2001), p.1, ...Show more