Which of the following practices helps improve soil quality in nurseries?

Regularly rotating crops is a beneficial practice for improving soil quality in nurseries. This method involves alternating the types of plants grown in a particular area over time. Crop rotation enhances soil fertility, reduces pest and disease buildup, and promotes a diverse soil microbiome. Different plants have varying nutrient requirements and root structures; rotating them helps prevent nutrient depletion, improves soil structure, and enhances organic matter content. This diversification can lead to healthier plants, as it encourages a more balanced ecosystem within the soil.

In contrast, using synthetic fertilizers exclusively can lead to nutrient imbalances and soil degradation over time, as they don't contribute organic matter or improve the soil's overall health. Limiting watering to once a week may not meet the plants' needs and can stress them, leading to poor growth or increased susceptibility to disease. Avoiding organic matter would miss the benefits that compost or other organic amendments provide, such as enhancing microbial activity and improving soil structure. Therefore, crop rotation stands out as the most effective practice for nourishing and sustaining soil quality in nursery settings.