Which of the following conditions makes nitrogen more available to turf?

Proper irrigation practices significantly enhance nitrogen availability to turf by ensuring that the grass receives adequate moisture. When irrigation is managed effectively, it creates a conducive environment for soil microbial activity, which is essential for the conversion of nitrogen in the soil into forms that plants can absorb. Adequate moisture helps to dissolve nutrients and facilitates their movement through the soil, making nitrogen more accessible to grass roots.

In addition, proper irrigation prevents the leaching of nitrogen, which can occur when excess water is applied. When turf is well-irrigated but not over-watered, it promotes healthy root growth and supports the overall health of the grass, allowing it to utilize nitrogen more efficiently.

Soil compaction restricts root growth and movement of water and nutrients, excess tilling can disturb soil structure and lead to nutrient loss, while over-seeding with grass could lead to competition for nutrients if not managed properly, potentially diminishing nitrogen availability. However, proper irrigation practices distinctly support the optimal conditions for nitrogen utilization by turf.