Table 1. Field site descriptions for conventional tillage (CT)<br> and no-tillage (NT) fields at Dixon Springs (DS) and Belleville (BV).

Illinois Fertilizer Conference Proceedings
January 26-28, 2006

Table 1. Field site descriptions for conventional tillage (CT)
and no-tillage (NT) fields at Dixon Springs (DS) and Belleville (BV).

Variable	Dixon Springs		Belleville
Variable	CT	NT	CT	NT
Soil Type	Grantsburg silt loam		Iva⁄Weir Silt loam
Productivity	Corn 120 bu⁄a Soybean 41 bu⁄a		Corn 120⁄155 bu⁄a Soybean 41⁄47 bu⁄a
5–yr Historic Corn Yields	134 bu⁄a		169 bu⁄a(IVA)
	----------------------lb⁄acre----------------------
Soil Test P(2000)	20	30	87	65
Soil Test K(2000)	97	176	330	315
Rec. P₂O₅^†	232	186	120	120
Used P₂O₅^†	180(390)^††	120(260)^§	120(260)	120(260)
Rec. K₂O^†	422	264	121	121
Used K₂O^†	240(400)^††	120(200)^††	120(200)^††	120(200)^††
Corn Hybrid	Pioneer 33P67	Pioneer 33P67	Pioneer 33P67	Pioneer 33P67
Planting Date	5⁄11 (replant)	4⁄20	5⁄5	5⁄5
Soybean Variety	Asgrow 4403	Asgrow 4403	Asgrow 4403	Asgrow 4403
Planting Date	5/11	5/11	5⁄5	5⁄5

^†Based on biennial application of buildup and maintenance P and K.

^††Numbers in parentheses are rates of 0-46-0 and 0-0-60 for P₂O₅ and K₂O, respectively.

^§P and K rates increased in 2004 and 2005 to 180 P₂O₅ and 240 lb K₂O/acre, respectively, for the NT system to match the CT system.

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