Why is soil losing its fertility?
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Because of lack of nutrients and by using excessive fetilisers soil loses its fertility...............
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The following are the reasons:
- Leaching – Plant nutrients are lost beyond the reach of plant roots. Usually caused by excessive rainfall washing nutrients deep down into sub-soil beyond new roots reach.
- Soil erosion – Top soil is lost by the agent of erosion e.g. wind, water.
- Monocropping – This utilizes only specific nutrients from a particular zone making it exhausted. -It also causes accumulation of certain pests and diseases.
- Continuous cropping –This continuously exhaust the fertility of land unless the the land if fallowed.
- Change of soil PH -Use of either acidic or basic fertilizers affect soil pH and Consequently the presence of micro-organisms hence soil fertility affected.
- Burning of vegetations –Destroys organic matter and soil structure. Nutrients are lost and soil exposed to erosion.
- Accumulation of salts – Common in waterlogged areas and semi-arid areas in which poor drainage causes evaporation during the dry periods, making the soil saline.
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