5. Which THREE of the following agricultural practices are most likely to have a negative impact on the environment?
Answer: A,B,C
Increasing fertilizer use, excessive irrigation, and nonselective herbicide application negatively impact the environment.
These agricultural practices can lead to significant environmental degradation, including soil and water pollution, loss of biodiversity, and disruption of ecosystems.
A) Increasing the amount of fertilizer applied to a field to maximize crop yields
This practice can lead to nutrient runoff into nearby water bodies, causing eutrophication, which depletes oxygen levels and harms aquatic life. Over-fertilization can also degrade soil health over time, leading to a cycle of dependency on chemical inputs.
B) Providing a field with excessive amounts of water to maintain ground saturation
Excessive irrigation can lead to waterlogging and salinization of soil, both of which can severely reduce agricultural productivity. It can also result in the depletion of local water resources, harming surrounding ecosystems and communities dependent on those water supplies.
C) Applying nonselective herbicides to a field at the end of the growing season to eliminate weeds
Nonselective herbicides can kill a wide range of plant species, including beneficial ones. This practice can diminish biodiversity, harm pollinators, and disrupt food chains in local ecosystems, ultimately leading to long-term ecological consequences.
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 preserve soil structure, reduces erosion, and promotes biodiversity. It does not negatively impact the environment and is often encouraged in sustainable agriculture.
Conclusion
The correct options—A, B, and C—represent practices that contribute to environmental harm through pollution, resource depletion, and loss of biodiversity. In contrast, option D illustrates a sustainable practice that mitigates negative impacts, reinforcing the importance of mindful agricultural techniques in preserving environmental health.