What negative consequence does monoculture have on soil health?

• A. It increases biodiversity in the soil
• B. It depletes specific nutrients and creates pest outbreaks
• C. It enhances soil structure and aeration
• D. It promotes deep root systems in plants

Answer: (B)

Monoculture, which is the agricultural practice of growing a single crop over a wide area for many consecutive years, can have significant negative consequences on soil health, particularly in relation to nutrient depletion and pest outbreaks. When the same crop is consistently planted, the soil tends to lose specific nutrients that this crop requires for growth. Different plants have varying nutrient needs, and by repeatedly cultivating the same crop, essential nutrients like nitrogen, phosphorus, and potassium can become depleted. This leads to imbalances in the soil that affect its overall health and productivity.

Additionally, monoculture creates an environment that can be conducive to pest outbreaks. Pests and diseases that specifically target the monoculture crop can thrive unimpeded due to the lack of diversity. Without natural predators or crop rotation that disrupts the life cycle of these pests, they can proliferate, leading to significant reductions in crop yields and requiring increased use of chemical inputs to control them.

In contrast, practices such as crop rotation and polyculture can promote a more diverse and balanced soil ecosystem, enhancing overall soil vitality and resilience against pests and diseases. Understanding the implications of monoculture is crucial for sustainable agricultural practices that foster long-term soil health.