Final answer:
The optimal temperature range for warm-season turfgrass growth at a 2-inch soil depth is 50-75°F (B). This range supports dense and healthy grasses, with temperatures facilitating balanced respiration and photosynthesis.
Step-by-step explanation:
The temperature range at a 2-inch soil depth for optimal top growth of warm-season turfgrasses is B) 50-75°F. Warm-season turfgrasses thrive in this temperature range, which promotes root and rhizome growth, leading to healthy, dense vegetation. This range is ideal because it allows for efficient photosynthesis while keeping respiration rates in balance to maintain a high net photosynthesis.The optimal temperature range for warm-season turfgrass growth at a 2-inch soil depth is 50-75°F (B). This range supports dense and healthy grasses, with temperatures facilitating balanced respiration and photosynthesis.
Regarding frost damage, at temperatures of 28.0°F or lower, most plants may experience damage. To convert this temperature to the Kelvin scale, we would use the formula K = (°F + 459.67) × 5/9. Substituting 28.0°F into this formula gives us a temperature of 269.82 K on the Kelvin scale.