What is the function of a tiller in agriculture?

The function of a tiller in agriculture is primarily to cultivate and prepare the soil for planting. A tiller is a tool or piece of equipment designed to break up the soil, mix in organic matter, and create a fine seedbed that is essential for successful crop growth. By enabling better aeration and drainage, tilling helps to improve soil structure and prepares a fertile environment for seeds to germinate and develop.

The other choices refer to different agricultural practices: harvesting, irrigating, and fertilizing, which all serve distinct purposes in the lifecycle of crop production but are not the primary functions associated with tilling. Tilling specifically focuses on soil preparation, which is a critical step to ensure that plants have the best chance to thrive from the start.