Even though potassium is stratified under reduced tillage (as it is in a permanent sod) , 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（象永久性草地一样），但在土表附近，作物根系发达保证作物对钾有足够的吸收。