Even though potassium is stratified under reduced tillage, it is apparent that roots proliferate sufficiently near the soil surface to assume adequate potassium uptake by crops.
虽然在少耕制下，土壤钾有明显的分层分布但在土表附近，作物根系发达保证作物对钾有足够的吸收。
2
Soil aggregate degree increased with no-tillage years, especially in the surface layer.
土壤团聚度随免耕年限的增加而增加，表层增加更明显；
3
For analyzing the adhesion between soil and tillage tools, the profiles of pressure on the wave bulldozing plates were calculated, and we located the position of the maximum friction on the surface.