In GeoPard you can use same or different maps for P & K, we provide options and don't tell you how to do this (IMO software shouldn't tell what to do until everything is in sensors and AI is very smart). Perfect case is that you have field potential/good zones, high density soil data, then you can calculate fert need per each polygon yield target, but in reality usually there is no high accuracy soil data (until you use smth like soiloptix).

Blocks (we call them grids in equation-based maps) could be rotated in GeoPard (one angle per map). An example of cells rotation angle (Image also attached, heading AB violet line). 

I personally like zones more for VRA (you can also create zones from equation map); because it's kind of balance between simplicity & easiness of management. Nevertheless grids are totally fine as well, especially if you have a right size of them (your equipment or section control width).

In our software we charge per map saved (in usage based plan), you can add up to 3 products. In case you'll create many maps per season, consider subscription (calculators are at the pricing page). 

Then in case of shp export you'll have per product attribute, in case of ISOXML export it's an iso file, in case of John Deere WorkPlan you can select same or various zones in one workplan (use-case with John Deere WorkPlan for seeding & fertilizing).

(geopard - heading angle (full).png)

geopard - heading angle (full).png (73KB - 1 downloads)