Tillage's the agricultural preparation of the soil by ploughing, ripping, or turning it. Tillage can also mean the land that's tilled. There're two types of tillage: primary and secondary tillage. Tillage systems Intensive tillage Intensive tillage systems leave less than 15% crop residue cover or less than 500 pounds per acre (560 kg/ha) of small grain residue. These types of tillage systems are often referred to as conventional tillage systems but as reduced and conservation tillage systems h… (More on Tillage)