Which factor is crucial for the health of root systems in nursery plants?

Moisture is crucial for the health of root systems in nursery plants because it directly affects their ability to absorb nutrients and maintain cellular functions. Roots, much like other living tissues, require a balance of moisture to support growth and development. Adequate moisture levels promote healthy root expansion and increase the roots' effectiveness in anchoring the plant and accessing water and nutrients from the soil.

Inadequate moisture can lead to stress in plants, causing root systems to become stunted or even die, which jeopardizes the overall health of the plant. Proper watering practices help ensure that roots receive the hydration they need without becoming waterlogged, which can cause root rot and other detrimental conditions. Thus, maintaining appropriate moisture levels is essential for promoting robust and healthy root systems in nursery plants.