Can power harrow drills, used in existing plough based systems also be used in good conditions for minimal tillage, for example after light discs or a subsoiler, or will they not work deep enough?
Be very careful with power-harrow drills and reduced tillage. Those with Suffolk coulter tines will tend to block with straw and struggle to penetrate consolidated seedbeds and produce poor results on heavier soils. However, careful use with straw removed on loose lighter soils can work as long as the seedbed is consolidated after drilling. However, the best answer, if you want to adapt the current drill is, if possible, to change to disc coulters. The target however, should be use/ purchase of an appropriate cultivator drill or direct drill.
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