You should look into conservation agriculture. It's less oil, less labor, less fertilizer, less pesticides than organic agriculture (and better soils). Only downside, lot of mice.

The conservation agriculture I'm familiar with uses less fuel, less labour, less fertilizer, less tillage but more pesticide than either conventional or organic agriculture. Another name for this type of agriculture is zero-till.

I was mostly thinking about soil loss. Tillage results in a massive loss of topsoil through erosion.

Tillage is also devastating for animal life in the soil.