Two ways in which agricultural practices can affect ecological system are: (i) Bush burning affects or reduces organic content of the soil. It increases inorganic content of the soil and kills the soil micro-organisms (ii) Fertilizer application changes the soil pH, alters chemical composition of the soil and adds nutrients to the so Other ways include: (iii) Tillage leads to erosion, aeration and leaching of soil (iv) Irrigation brings about high humidity and increased moisture content of the soil. It decreases air content and aeration of the environment. (v) Herbicides and pesticides pollute water and land. They also alter the vegetation or fauna (vi) Bush clearing destroys vegetation
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