Direct drilling usually involves relatively narrow working widths, but if you really want to cover the ground this 15m Condor drill from Amazone could be just the ticket.
It comes in more normal lengths from 3m upwards, all of which give less soil disturbance and less chance of precious soil moisture leeching away.
The ConTec tine coulter is said to give a trash-free seed slot and up to 120kg in coulter pressure can be brought to bear on the ground.
The seed tank holds 8000 litres of seed and the 15m model costs £136,750.
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