Conservation tilling techniques, for example, can leave a large amount of the crop residue on the soil surface.

Manure, garden waste and crop residues are all sources of biomass.

Ploughing leaves very little crop residue on the surface, which otherwise could reduce both wind and water erosion.

Decomposing crop residue (green manure) from prior years is another source of fertility.

This coulter is designed to cut through crop residue and into the hard crust of the soil.

Some leaves, stalk stubble and all of the roots remain in the field as crop residues.

Tight controls covering the burning of all crop residues now have the force of law behind them.

It cannot survive on dead tissue or crop residues.

Nutrients in most crop residue are not immediately available for crop use.

The crop residue left on the soil surface also limits evaporation, conserving water for plant growth.