warksfarmer
Member
The trouble with precision like that is that you cannot go wide or fast. It would take forever to cover a twenty acre field and you would miss some anyway. If you go fractionally deeper you will just relocate small plants and fractionally shallower and to will miss. Killing pants by surface cultivation is a very poor system especially in a wet year such as this, I can remember ineffectively chasing small BG plants round and round for days when glyphosate was expensive.
I'm not sure I agree with this. If you get a flush of weeds and then cultivate to remove them from their rooting then that weed is dead as it won't regerminate from that same seed. I've seen first hand somebody getting on top of Blackgrass with repeated light cultivations. Roughly halved numbers in 5 years whilst sticking with the same chemical approach.
There's also a guy running a weaving tined drill who has gone from 400 seeds/m2 to 4 using the same approach of multiple passes prior to actually drilling a cash crop.