Rationale
Increasing the amount of fertilizer applied to a field, providing excessive amounts of water, and applying nonselective herbicides are practices likely to negatively impact the environment.
These three agricultural practices can lead to significant environmental degradation, including water pollution, soil degradation, and loss of biodiversity. Their adverse effects can compromise ecosystem health and sustainability.
A) Increasing the amount of fertilizer applied to a field to maximize crop yields
Excessive fertilizer application can result in nutrient runoff into waterways, leading to eutrophication, which depletes oxygen levels and harms aquatic life. This practice also contributes to soil acidification and can disrupt the natural microbial ecosystem in the soil.
B) Providing a field with excessive amounts of water to maintain ground saturation
Over-irrigation can lead to waterlogging, which damages plant roots and reduces crop yield. Additionally, it can cause salinization of the soil, where the accumulation of salts negatively affects soil fertility and agricultural productivity, while also wasting valuable water resources.
C) Applying nonselective herbicides to a field at the end of the growing season to eliminate weeds
Nonselective herbicides kill all plant life, which can lead to a decline in biodiversity and disrupt local ecosystems. They can also contaminate soil and water sources, harming non-target organisms and potentially entering the food chain.
D) Planting crops in a field with minimal disturbance of the surface soil to reduce soil erosion
This practice, known as conservation tillage, is generally beneficial for the environment as it helps maintain soil structure, improves moisture retention, and reduces erosion. It promotes a healthier ecosystem by preserving soil organisms and preventing nutrient loss.
Conclusion
The identified practices—excessive fertilizer use, over-irrigation, and nonselective herbicide application—are detrimental to the environment due to their contributions to pollution, habitat destruction, and soil degradation. In contrast, minimal soil disturbance through conservation practices supports sustainability and ecosystem health, highlighting the importance of environmentally conscious agricultural methods.
