Which of the following components is not found in healthy soil?

Healthy soil typically contains a diverse ecosystem that is essential for plant growth and environmental health. One of the key characteristics of healthy soil is the presence of microorganisms, which play crucial roles in nutrient cycling, organic matter decomposition, and maintaining soil structure.

Additionally, healthy soil is rich in mineral nutrients that plants need to thrive, such as nitrogen, phosphorus, and potassium. These nutrients are vital for plant development and support a variety of biological processes. Organic debris, including decomposing plant and animal matter, is also a fundamental component of healthy soil. It contributes to soil structure, improves water retention, and provides a habitat for soil organisms.

In contrast, the presence of harmful heavy metals in soil is a significant concern as they can adversely impact soil health, microbial communities, and plant growth. Heavy metals can accumulate in the soil and pose risks to both environmental and human health, thereby categorizing them as components that should not be found in healthy soil. Thus, the correct identification of harmful heavy metals as not being a part of healthy soil aligns with the understanding of soil quality and sustainability.