Table 4. Wheat grain yield and grain S and N concentration as affected by tillage, sulfur application, and variety -- Brownstown, 1990.

Tillage ‡	Variety	Grain									Grain Yield
		Sulfur Rate, lb S/acre
		0	25	Mean †	0	25	Mean †	0	25	Mean †	0	25	Mean †
		-------% S--------			-------% N -------			N/S			--- bu/acre --
CT	Becker	0.15	0.15	0.15a	2.01	2.04	2.03	13.8	14.0	13.9b	58	61	60
	Caldwell	0.14	0.14	0.14b	2.06	2.15	2.11	14.4	15.0	14.7a	55	58	57
	Cardinal	0.15	0.14	0.14b	2.17	2.14	2.15	14.8	15.3	15.1a	67	70	69
	2555 §	0.15	0.15	0.15a	2.06	2.09	2.08	13.5	13.6	13.6b	58	61	60

Mean_CT		0.15	0.15	0.15	2.08	2.11	2.09a	14.1	14.5	14.3	60	63	61

NT	Becker	0.14	0.15	0.15a	2.00	1.99	2.00	14	13.6	13.8b	60	59	60
	Caldwell	0.15	0.15	0.15a	2.05	2.06	2.06	14	13.7	13.9b	53	54	53
	Cardinal	0.14	0.14	0.14b	2.07	2.07	2.07	14.4	14.8	14.6a	67	65	66
	2555	0.14	0.15	0.15a	2.04	2.09	2.07	14.3	14.0	14.1b	54	54	54

Mean_NT		0.14	0.15	0.15	2.04	2.06	2.05b	14.2	14.0	14.1	59	58	58

Mean_{Across Tillage^†}	Becker	0.15a	0.15a	0.15a	2.01	2.02	2.01c	13.9	13.8	13.8c	59	60	60b
	Caldwell	0.15a	0.15a	0.15a	2.06	2.11	2.08ab	14.2	14.4	14.3b	54	56	55c
	Cardinal	0.15a	0.14b	0.14b	2.12	2.11	2.11a	14.6	15.1	14.8a	67	67	67a
	2555	0.15a	0.15a	0.15a	2.05	2.09	2.07b	13.9	13.8	13.8c	56	58	57c

Mean_Sulfur		0.15	0.15		2.06	2.08		14.1	14.3		59	60

Illinois Fertilizer Conference Proceedings January 25-27, 1999