Which factor increases the risk of root rots in excess moisture conditions for crops?

Study for the CCA Ontario Crop Management Exam. Prepare with multiple-choice questions; each provides hints and explanations. Ensure your readiness for the exam!

The presence of poor drainage significantly increases the risk of root rots in conditions of excess moisture. When drainage is inefficient, water accumulates in the root zone, leading to saturation of the soil. This waterlogged condition creates an ideal environment for pathogens that cause root rots, as these organisms thrive in wet conditions where oxygen levels are low. Without proper drainage, crops are more susceptible to diseases, which can lead to reduced growth, poor yield, and even crop loss.

In contrast, high heat units generally favor plant growth and can help dry out excess moisture more quickly, while soil compactness may allow for less water retention in certain contexts but does not directly correlate to higher risk of root rot compared to poor drainage. Increased crop diversity can often enhance soil health and resilience against diseases, making it less likely to contribute to root rot issues.

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