No Till

No-till farming, also known as conservation tillage or zero tillage is a way of growing crops from year to year without disturbing the soil through tillage. Once called chemical farming, the reference was subdued in order to promote the idea of no-till being more natural. It is becoming more common as researchers study its effects and farmers uncover its economic benefits.
See more at Wikipedia.org...

Planting crops without prior seedbed preparation, into an existing cover crop, sod, or crop residues, and eliminating subsequent tillage operations.