Photo AI
The correct amount of nitrogen fertiliser is of great benefit to crop growth, but excessive nitrogen can have negative effects - Leaving Cert Agricultural Science - Question b - 2016
Question b
The correct amount of nitrogen fertiliser is of great benefit to crop growth, but excessive nitrogen can have negative effects. Discuss this statement.
Worked Solution & Example Answer:The correct amount of nitrogen fertiliser is of great benefit to crop growth, but excessive nitrogen can have negative effects - Leaving Cert Agricultural Science - Question b - 2016
Step 1
Benefits of nitrogen fertiliser.
Answer
Nitrogen fertiliser plays a crucial role in crop growth. It stimulates the growth of leaves and stems, which is essential for overall plant development. Additionally, it increases tillering, which improves plant density and yield. Moreover, nitrogen enhances the establishment of crops, facilitates photosynthesis by aiding in the production of chlorophyll, and is vital for protein synthesis within the plant cells. All these factors contribute to increased cell division and ultimately lead to higher crop yields.
Step 2
Negative effects of excessive nitrogen.
Answer
While nitrogen is beneficial, excessive application can lead to detrimental effects on crop health and the environment. High nitrogen levels can cause increased lodging in plants, making them more susceptible to falling over. It can also delay the ripening process, leading to reduced quality of the harvest. Moreover, overly nitrogen-rich soils can increase disease susceptibility, which can lower crop outputs. In addition, applying too much nitrogen can inhibit clover growth, contribute to water pollution or eutrophication, and impact soil health by leaching valuable nutrients. Lastly, it can lead to silage preservation issues and make crops more prone to frost damage.