Table 4.

Differences in management of fields in non-problem and problem counties in the year the field was sampled

Field history metrica	Non-problem countyb	Problem countyb	df	χ 2	P
Non-Bt corn planted	0.18 (3)	0.05 (1)	1	1.52	0.22
Cry3 corn planted	0.29 (5)	0.00 (0)	1	6.80	0.01
Cry34/35Ab1 corn planted	0.06 (1)	0.30 (6)	1	3.48	0.06
Cry34/35Ab1 + Cry3 corn planted	0.47 (8)	0.65 (13)	1	1.20	0.27
Soil insecticide	0.17 (2)	0.20 (4)	1	0.05	0.82

^aMetrics are present or absent for the year the field was sampled. Absent = 0, Present = 1. For field categories, Non-problem county = 0, Problem county = 1.

^bProportion of fields in the field category using the management tactic (N).