SOIL AS A NUTRIENT RESERVOIR


              SOIL AS A NUTRIENT RESERVOIR



-Soil colloids serve to maintain a reserve of soluble nutrient in the soil.
- the colloid compound of soil consisting of clay particle and humus.
- sand, slit and clay which are difference on the basis of particle size from the mineral compound in the soil
-A part from clay,also contain a colloidal carbonaceous residue called humus.
-Humus is an organic materiel that has been slowly but incompletely degraded to a colloidal dimension through the action of weathering and micro organism which make great contribution to the nutrient reservoir  

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