Defend the grower’s choices in the following scenario. Situation: A grower tracking the weather report hears that a freeze is coming that might endanger his trees and their emerging blossoms. The weather is bright and clear. The grower uses a cultivator to clear away weeds and growth, exposing dark soil, and turns on the irrigators for an hour, ensuring the soil is well dampened. Then he covers the ground with clear plastic sheet-mulch.