. 2022 Jul 4;115(4):1177–1190. doi: 10.1093/jee/toac090

Table 2.

P-values from generalized linear mixed models used to test the effect of sampling period (Sample), cover crop planting date (PD), cover crop terminating date (TD), and its interactions per year. Significant P-values (<0.05) are shown in bold

Year				2019							2020
Class	Order	Family	Stats	PDTDSample	PD*Sample	TD*Sample	PD*TD	Sample	PD	TD	PDTD Sample	PD*Sample	TD*Sample	PD*TD	Sample	PD	TD
Insecta	Coleoptera	Staphalynidae	P	N/A							0.6632	0.9734	0.5795	0.8447	<.0001	0.292	0.0866
			F								0.79	0.36	0.66	0.34	166.72	1.4	3.4
			Num df, Den df								12, 91	12, 91	3, 91	4, 14	3, 91	4, 12	1, 14
		Nitidulidae	P	0.7156	0.0031**	0.0902	0.7296	<.0001***	0.1108	0.4543	0.5951	0.0873	0.0033**	0.5243	<.0001	0.351	0.1817
			F	0.77	2.36	2.04	0.51	50.76	2.16	0.58	0.85	1.67	4.91	0.84	33.3	1.23	1.98
			Num df, Den df	16, 200	16, 200	4, 200	4, 25	4, 200	4, 20	1, 25	12, 91	12, 91	3, 91	4, 14	3, 91	4, 12	1, 14
		Zopheridae	P	N/A							0.3518	0.0033**	0.3117	0.1223	<.0001***	0.5154	0.5458
			F								1.11	2.43	1.21	2.2	95.68	0.86	0.38
			Num df, Den df								16, 121	16, 121	4, 121	4, 14	4, 121	4, 12	1, 14
	Diptera	Anthomyiidae	P	0.5555	0.3951	0.2649	0.8004	<.0001***	0.1176	0.0663	N/A
			F	0.91	1.06	1.32	0.41	55	2.11	3.69
			Num df, Den df	16, 200	16, 200	4, 200	4, 25	4, 200	4, 20	1, 25
	Hemiptera	Aphididae	P	N/A							N/A	N/A	N/A	0.3893	N/A	0.157	0.0092***
			F								N/A	N/A	N/A	0.79	N/A	2.31	9.12
			Num df, Den df								N/A	N/A	N/A	1, 14	N/A	1, 11	1, 14
Arachnida	Araneae	–	P	0.5193	0.6094	0.1297	0.4444	<.0001***	0.0007**	0.5971	0.8557	0.3558	0.0082**	0.3701	<.0001***	0.0288**	0.8622
			F	0.94	0.87	1.8	0.96	26.9	7.6	0.26	0.63	1.11	3.61	1.16	114.81	3.69	0.03
			Num df, Den df	16, 200	16, 200	4, 200	4, 25	4, 200	4, 20	1, 25	16, 121	16, 121	4, 121	4, 14	4, 121	4, 12	1, 14
	Acari	–	P	0.0200**	0.0048**	0.3711	0.0401**	0.0542	0.1275	0.0542	0.9401	0.0143**	0.0006**	0.0468*	<.0001	0.2412	0.3531
			F	3.21	4.26	0.81	2.95	3.89	2.04	4.08	0.45	2.27	6.29	3.18	839.41	1.59	0.92
			Num df, Den df	4, 50	4, 50	1, 50	4, 25	1, 50	4, 20	1, 25	12, 91	12, 91	3, 91	4, 14	3, 91	4, 12	1, 14
Collembola	–	–	P	0.4449	0.821	0.5475	0.4319	<.0001***	0.0745	0.8461	0.6372	0.0626	0.5522	0.8675	<.0001***	0.0487*	0.7465
			F	1.01	0.62	0.72	0.99	181.16	2.51	0.04	0.84	1.66	0.76	0.31	388.37	3.29	0.11
			Num df, Den df	12, 150	12, 150	3, 150	4, 25	3, 150	4, 20	1, 25	16, 121	16, 121	4, 121	4, 14	4, 121	4, 12	1, 14
Total Arthropods			P	0.0182**	0.0120**	0.6551	0.281	<.0001***	0.3461	0.631	0.1217	<.0001***	0.0003**	0.1513	<.0001***	0.1435	0.1544
			F	1.95	2.05	0.61	1.35	534	1.19	0.24	1.47	4.89	5.68	2	518	2.1	2.27
			Num df, Den df	12, 200	16, 200	4, 200	4, 25	4, 200	4, 20	1, 25	12, 121	16, 121	4, 121	4, 14	4, 121	4, 12	4, 14

N/A family did not compose at least 1% of the total; therefore, arthropod taxa was not accounted for analysis. *** = <.0001 ** = <0.01 * = <0.05 significant levels.