What is the function of mulch in nursery production?

The primary function of mulch in nursery production is to conserve moisture and suppress weeds. When applied to the soil surface, mulch creates a barrier that reduces evaporation of moisture from the soil. This is particularly beneficial in nursery settings, where maintaining adequate moisture levels is critical for the healthy growth of plants. Additionally, mulch acts as a physical barrier against the growth of weeds. By covering the soil, it limits sunlight penetration, which is essential for weed germination and growth.

While mulch can contribute to aesthetics and may provide some indirect benefits to soil fertility and erosion control, its main roles in nursery production are moisture conservation and weed suppression. This is why option C is the best answer.