No-till farming is defined as:

The soil is left undisturbed from harvest to planting.  Planting or drilling is accomplished in a narrow seedbed or slot created by disk openers.   Coulters, residue managers, seed firmers, and modified closing wheels are used on the drill or planter to ensure adequate seed to soil contact.  In a properly designed no-till system, pest (weeds, disease, and insect) control is accomplished primarily with the following cultural practices:  rotation, sanitation, and competition.  Judicious use of herbicides may be used to provide the crop with a competitive advantage over the weeds.