What is the main goal of destroying underground storage organs of perennials through cultivation?

The primary objective of destroying underground storage organs of perennials through cultivation is to expose these organs to conditions that can inhibit their ability to regrow. By tilling or turning the soil, these underground structures, such as tubers or rhizomes, are brought closer to the surface where they become more susceptible to environmental stressors, like freezing or drying. This exposure can effectively reduce the plant's vigor and ability to sprout anew in the following growing seasons, thereby aiding in the control of perennial weeds or unwanted vegetation.

The other options do not align with this goal. Promoting faster plant growth typically refers to management practices that encourage growth rather than inhibit it. Allowing perennials to regrow is contrary to the intent of destroying their storage organs. Improving soil quality may occur as a secondary benefit of cultivation, but it is not the primary aim when targeting the underground storage organs of perennials.