Red Seal Agricultural Equipment Technician Practice Exam

Which factor can lead to decreased crop yields?

1. Improper irrigation

2. Soil compaction

3. Pest infestation

4. Poor weather conditions

The correct answer is: Soil compaction

Soil compaction is a critical factor that can lead to decreased crop yields. When soil becomes compacted, it restricts the movement of air, water, and nutrients, which are essential for root development and overall plant health. Compacted soil leads to reduced porosity, making it difficult for roots to penetrate and access nutrients and moisture. This can hinder plant growth and development, resulting in lower yields. Additionally, compacted soil can affect the soil's structure, leading to runoff and erosion, which further diminishes soil fertility. While factors like improper irrigation, pest infestation, and poor weather conditions certainly impact crop yields, soil compaction is particularly detrimental because it directly affects the physical environment in which crops grow, making it harder for them to thrive even under otherwise favorable conditions.