Which of the following is not a part of the tilling process?

Tilling is the agricultural preparation of soil through various types of mechanical agitation, such as digging, stirring, and overturning. It is simply turning the soil over and breaking it up.

Tilling is the first step in farming and is done to loosen the soil and remove unwanted plants from the soil. 

Tilling also involves the aeration of the soil. Sometimes manure is also added during the tilling process. 

Harvesting is the process of gathering crops or other agricultural products from the fields. It is not a step in the tilling process.