This planter planted over 300 acres of sweet corn in less then 10 days and was special built for a customer.
Here's a Polyplanter that lays 2 rows of plastic and plants 4 rows of sweet corn at the same time....
The plastic layer on this planter works very well. Notice the roller on the front of the layer... Shoes are used instead of disk for the reason there is much less covering problems .
Planting and laying plastic at the same time can be done at a speed of 4 to 5 MPH.