Wednesday, December 25, 2019

Essay about The Use of Fertilisers and Pesticides in...

The Use of Fertilisers and Pesticides in Agriculture Agriculture today dominates the majority of all land uses. As a result it has a fundamental role in maintaining the countryside and protecting the environment. The development of the use of fertilisers and pesticides has dramatically increased the efficiency of food production and has in fact more than quadrupled food production in the last century[1]. They also have reduced the cost and increased the variety of foods available. However, there are serious consequences to the uses of many of these pesticides and fertilisers and they have resulted in various environmental problems. Fertilisers: In a natural ecosystem plants eventually die†¦show more content†¦Also as it is often used as a waste product on mixed farms, applying farm manure to a plant crop is a useful way of disposing of this waste. The most commonly used fertilisers are the soluble inorganic (chemical) fertilisers. They are products of natural rocks; and contain cations and anions in a concentrated form. These cations and anions are the same as those that occur naturally in fertile soil[3]. There are usually three primary nutrients within these chemical fertilisers (although are contained in organic fertilisers too); all of which have certain properties playing an important part for increasing a higher yield in agriculture. These are Nitrogen, Phosphorus and Potassium (NPK).  · Nitrogen is fundamental for leaf growth, which is where photosynthesis mainly takes place; therefore vital in increasing crop yields. Nitrogen also contains a number of proteins, so therefore also affecting the quality of the crop.  · Phosphorus is important for cell division so therefore is needed by parts of the plant that are growing rapidly. It is found in many of the organic substances the plant produces, i.e. nucleic acids, ATP.  · Potassium is used for both respiration and photosynthesis. 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