land gtype yield
 1 AA 11.464221
 1 AB 17.971128
 1 BB 19.336142
 2 AA 14.527968
 2 AB 24.189423
 2 BB 20.329894
 3 AA 17.307526
 3 AB 13.057851
 3 BB 21.590777
 4 AA 13.700406
 4 AB 15.694641
 4 BB 19.079048
 5 AA 21.101127
 5 AB  5.750083
 5 BB 16.796108
 6 AA 21.710367
 6 AB 12.745580
 6 BB 23.693704
 7 AA 13.251308
 7 AB 13.032345
 7 BB 12.467251
 8 AA 13.289352
 8 AB 10.179729
 8 BB 25.155596
 9 AA 13.263990
 9 AB  9.681272
 9 BB 30.904896
10 AA  9.572870
10 AB 17.147904
10 BB 20.338783