Ooh, yeah, +30% to our total Agriculture output can be very nice indeed.
If I read it right, production is based on CR, correct? So I allocate one CR5 to, say, Culture in each 2 parcels, and the CR 6 in a third. The 2 CR4's together take Parcel 4, being CR6. I've now got 22 Culture cranking out, 24 if my crazy-rich keep gives a 10% bonus.
2 CR3's each go into two parcels for Wealth, being CR5. 3 CR 2's take parcel 3 for CR 5, and 4 take parcel 4 for CR 6. That's 21 Wealth production, 42 with Economy as an area specialty.
I've still got 75 level 1 dudes to assign, though. Throwing 5 of them into each parcel for Agriculture nets me another +20 Food surplus, for a total of +28.
With my personal specialty of Research, I can spend another 20 mooks to manufacture 40 research points, which are all surplus for the moment. Spending 20 mooks on Trade, though, gives me a total trade buffer of 40 as well, so I can trade that research for Wealth.
At the end of it all, I've got 15 mooks left (put them on Security, I guess). I have a Wealth deficit of 9, a Culture deficit of 67-69, and a Food surplus of 28. My Security rating is 10 (CR8+2), CR12 if my cohort is currently at home to lead them on patrols.