37. Which THREE of the following agricultural practices are most likely to have a negative impact on the environment?
Answer: A,B,C
A, B, and C are most likely to have a negative impact on the environment.
Increasing the amount of fertilizer, providing excessive water, and applying nonselective herbicides can all lead to detrimental environmental effects, such as water pollution, soil degradation, and harm to non-target species.
A) Increasing the amount of fertilizer applied to a field to maximize crop yields
This practice is likely to have a negative impact on the environment as it can lead to nutrient runoff into nearby water bodies, causing eutrophication. The excessive nutrients can deplete oxygen levels in water, harming aquatic ecosystems and leading to dead zones.
B) Providing a field with excessive amounts of water to maintain ground saturation
Excessive irrigation can negatively impact the environment by causing waterlogging, reducing soil aeration, and increasing salinity levels. It can also lead to the depletion of local water resources and contribute to the degradation of soil quality over time.
C) Applying nonselective herbicides to a field at the end of the growing season to eliminate weeds
Using nonselective herbicides can harm beneficial organisms, including pollinators and soil microbes. Additionally, these chemicals can leach into the soil and waterways, posing risks to biodiversity and human health.
D) Planting crops in a field with minimal disturbance of the surface soil to reduce soil erosion
This practice is generally considered environmentally friendly, as it helps maintain soil structure and prevents erosion. It enhances soil health and promotes biodiversity rather than negatively impacting the environment.
Conclusion
Options A, B, and C are all practices that can lead to significant environmental harm, including pollution and biodiversity loss. In contrast, option D presents a sustainable agricultural practice that mitigates negative impacts, highlighting the importance of responsible farming techniques. The core concept being tested is the understanding of agricultural practices and their environmental implications, with A, B, and C clearly failing in promoting ecological balance.