Foliar Potassium Fertilizer Additives Affect Soybean Response and Weed Control with Glyphosate

Table 1

Soil test values for Novelty, Portageville, and Malden in 2004 and 2005.

	Soil	Cation	pH (0.01 M CaCl2)		Exchangeable (1 M NH4AOc)
Site-year	organic matter	exchange capacity		Bray 1 P	K	Ca	Mg	Cu	Fe	Mn	B	SO 4-S	Zn
	(g kg^−1)	(cmolc kg^−1)		(kg ha^−1)				(mg kg^−1)
Novelty
2004	26	12.7	6.2	38	380	4,080	460	0.87	94.7	23.5	0.02	5.9	0.5
2005	26	14.9	6.4	29	400	5,060	440	0.80	65.8	28.0	0.15	5.0	0.5
Portageville
2004	17	8.3	5.7	76	390	1840	330	0.48	79.0	16.9	0.12	2.0	1.4
2005	16	8.2	5.4	132	470	1450	260	0.75	89.6	21.3	0.13	0.7	1.1
Malden
2004	8	4.2	5.9	101	281	1550	220	0.40	32.5	8.9	0.11	1.2	—^†
2005	9	4.6	6.0	93	299	1320	240	0.33	35.6	7.7	0.13	1.9	—

^†Data were not collected.