It’s more about ‘traction’ rather than hp as it
really depends on soil type and conditions at drilling time. If your going to go late on in the autumn say November time to beat grass weed issues and the soils wet then you’ll need plenty of traction. So with a wheeled tractor in those conditions on clay soils your looking at 75hp/metre. With a tracked tractor I think you could reduce that to 60hp/metre.
If there’s no grass weed issue and your drilling into nice soil in September in drier conditions then probably 50hp/metre.
It’s quite heavy with a tank full if your running a rear tank so take that into account as well.
Fertiliser wise then no we are not placing any. I’m not convinced it’s cost efficient to be honest but yes you can do it if you run a front tank and pipe the fert back to the closing blades as 1 closer runs between two seeding tines so you’d be placing it just to the side of the seed row so it wouldn’t scorch the seed.