Planting for the future

 We've been planting on permanent spacing.  Photos show the process we are using.  We run the drill slow to bite slowly into the earth and make small pieces which help fill the hole up.  Marker stirs in the hole to help settle sand and dirt.  Click images for larger, not sure why they seem to be posting opposite of intended.

Spring 2021 Update

 Last fall we planted some ladino clover along with many bags of fescue clover on this land.  It has established itself pretty well.  The irrigation was recently installed.  Today was a big day in that the first pawpaw trees were planted.  Nearest the road and the far neighborrs is a Wabash tree followed by 9 seedling trees that I will plan on grafting to Wabash especially if the fruit does not taste good.  I dug holes deep enough for the tap roots, filled the holes with water, held the tree in place as I scooped a sand and topsoil mix in the hold along with some of the native soil.  Field fence was bent into a circle and covered with burlap for sun protection.  Easy to move push in poles secure the fencing in place.  Click images for larger.

Interesting read

 https://gardenandgun.com/feature/the-mad-scientist-of-pawpaws/?fbclid=IwAR1pLa9J0M-oABdu8UIvAvDmYpKWe1_CB6SADAcP3VdAZ53boek86qCL25c

Big week ahead

So the land we purchased has now been mowed a 2nd time, the old growth is starting to break down.  Saved seeds look they are starting to germinate and a couple of the seeds we bought are sprouting also.  Expected this week are the trees we will end up grafting from, time to get planting.  We also have Overleese and Davis.

Mowing the land

This is where the Pawpaw patch will go.  I will bring water to here but want to wait to plant until the mulched up wood breaks down another season.

Planning and Advice request

I want to plant a 1.2 acre orchard of Pawpaws.  This is land we purchased last year, had some weeds, brush, and small trees growing on it.  We had a large brush cutter cut all this back, last fall we put out clover.  We plan to let the land sit for a year, let stuff break down.  Nearby land is a little acidic.

We currently have three pawpaws.  Brief youtube video should follow.  We planted them in 2009, did minimal fertlization each year, they have only had water for two years.  We have a deep well with 70 GPM at 40 PSI possible.  While we love the Overleese flavor, not sure it makes sense to try and grow more of it given its relative stunted growth.  Video follows:  https://www.youtube.com/watch?v=CQW2Niw9HR4

Currently we have 48 stratified seeds from our pawpaws planted.  We picked up 200 more seeds from Peterson varieties.  The plan is to let these grow in pots for a season or two, graft if/when scion wood available, transplant to the land.  We are located in Eastern NC.  Land shape is as shown on following photo.

If we did straight rows we could potentially do 20-30 varieties.  One green World currently has 14 or so available.  I think we should buy one of each variety that we would grow to use for scions.

My questions are this:
What spacing? 
Best irrigation method?  We use Hunter PGP Ultra pop ups right now, familiar with them.
Grow many varieties or narrow it down?
Would Overleese maybe perform better on other root stock?
Long term fence strategy?
What else should I be considering at this point?

Thank you!