Which of the following correctly states the impact of irrigation on nitrogen needs for turf?

The assertion that irrigated turf needs more nitrogen is supported by the understanding of how irrigation influences the growth and nutrient uptake of turfgrass. When turf is irrigated, the availability of water encourages more vigorous growth, which in turn increases the plant's demand for nitrogen. This is due to nitrogen being a key nutrient that promotes growth, particularly in leafy and vegetative stages.

In well-irrigated conditions, turfgrass can achieve higher rates of photosynthesis and, consequently, enhanced biomass production. Without adequate nitrogen, these plants may exhibit stunted growth and reduced health, as nitrogen is essential for the synthesis of amino acids and proteins. Therefore, if irrigation is consistently applied, the turf requires a greater supply of nitrogen to support the increased biological activity and growth rate.

Understanding the needs of irrigated versus non-irrigated turf is crucial for ensuring proper nutrient management and achieving optimal turf health.