Which feature is crucial for effective plant spacing in nurseries?

Adequate air circulation is a crucial feature for effective plant spacing in nurseries because it significantly influences plant health and growth. Proper air movement helps prevent the buildup of humidity around the plants, which can lead to fungal diseases and other issues related to excessive moisture. By ensuring that there is enough space between plants, air can circulate freely, reducing the chances of disease transmission and allowing for better light penetration.

Moreover, good air circulation helps regulate temperature around the plants, making the environment more conducive to their growth. When plants are spaced appropriately, they have the opportunity to access the resources they need—such as light, water, and nutrients—without competing with one another, which is essential for optimal development.