Table 3. Effects of roundup rate on soybean yield, leaf Mn level, and flash rating, 2004.

Illinois Fertilizer Conference Proceedings
January 26-28, 2006

Roundup rate	RW	MN	WC	BR-L†	BR-UL	DS-L	DS-UL
	Soybean Yield (bu/acre)
0	68.3	79.3	50.7	67.5‡	67.0	50.2	43.2
22	62.2	80.4	52.6	69.9	65.9	55.0	41.1
44	71.4	78.4	48.7	67.6	68.0	48.1	43.4
88	54.7	78.8	48.0	65.1	65.1	47.5	42.5
linear	**	NS	*	NS	NS	*	NS
quadratic	*	NS	NS	NS	NS	NS	*
	Trifoliate Leaf Mn (ppm)
0	26	56	65	56	70	85	108
22	28	56	62	55	70	75	113
44	29	58	60	57	68	81	94
88	28	57	65	59	63	79	115
linear	NS	NS	NS	NS	NS	NS	NS
quadratic	NS	NS	NS	NS	NS	NS	NS
	"Flash"(5=no injury, 1 = severe yellowing)
0	5.0	5.0	5.0	5.0	5.0	Data Not Collected
22	5.0	4.4	5.0	4.0	4.7
44	5.0	4.0	4.8	3.5	3.9
88	4.0	3.0	4.0	2.7	2.3
linear	NS	**	**	**	**
quadratic	NS	NS	**	NS	NS

† L = limed, UL = unlimed.
‡ Only P.94B74 used for BR and DS