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Why is nitrogen needed in plants? Name two artificial fertilizers which contain nitrogen - Leaving Cert Agricultural Science - Question c - 2016
Question c
Why is nitrogen needed in plants? Name two artificial fertilizers which contain nitrogen. Give two reasons why leaching of nitrogen from soil is undesirable. What... show full transcript
Worked Solution & Example Answer:Why is nitrogen needed in plants? Name two artificial fertilizers which contain nitrogen - Leaving Cert Agricultural Science - Question c - 2016
Step 1
Why is nitrogen needed in plants?
Answer
Nitrogen is essential for plants as it is a critical component of amino acids, the building blocks of proteins. It plays a vital role in the formation of chlorophyll, which is necessary for photosynthesis. Additionally, nitrogen is involved in the synthesis of nucleic acids, such as DNA and RNA, which are crucial for cell division and growth. Overall, adequate nitrogen supply contributes to increased crop yield and healthier, more vigorous plant growth.
Step 2
Step 3
Give two reasons why leaching of nitrogen from soil is undesirable.
Answer
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Leaching of nitrogen can lead to environmental issues such as water pollution, resulting in eutrophication of nearby water bodies. This can cause algal blooms, which deplete oxygen in water and harm aquatic life.
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Additionally, loss of nitrogen from soil reduces its fertility, which subsequently leads to decreased crop yield and poor plant development. This can result in stunted growth and increased susceptibility to diseases.
Step 4
What role does clover play in the nitrogen cycle?
Answer
Clover plays a significant role in the nitrogen cycle through a process known as nitrogen fixation. As a legume, it has a symbiotic relationship with nitrogen-fixing bacteria, such as Rhizobium, which reside in nodules on the plant's roots. These bacteria convert atmospheric nitrogen (N₂) into ammonia (NH₃), making nitrogen accessible to plants. When clover is incorporated into the soil, either through natural decay or tillage, it enriches the soil with nitrogen, enhancing its fertility for subsequent crops.