8.1.2 Importance of fertilizers 8.1.3 Environmental hazards related to chemical fertilizers

Описание: Fertilizers replace the nutrients that crops remove from the soil. Without the addition of fertilizers, crop yields and agricultural productivity would be significantly reduced. That's why mineral fertilizers are used to supplement the soil's nutrient stocks with minerals that can be quickly absorbed and used by crops.

Some of the harm chemical fertilizers may cause include waterway pollution, chemical burn to crops, increased air pollution, acidification of the soil and mineral depletion of the soil.

Though chemical fertilizers increase crop production; their overuse has hardened the soil, decreased fertility, strengthened pesticides, polluted air and water, and released greenhouse gases, thereby bringing hazards to human health and environment as well.

1)The excessive use of fertilisers changes the chemical nature of soil and makes the soil less fertile. 2)The excessive use of fertilisers causes water pollution in ponds,lakes and rivers.

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