Agriculture Reference
In-Depth Information
MCSE annual cropping systems (1989-2010).
Year
Crop(s) a
Conventional
No-till
Reduced Input
Biologically
Based
Rate (Formulation; Timing) b
Rate (Formulation;
Timing) b + Cover Crop c
Cover Crop c
1989
Corn 1 or
wheat 2
123 (34-0-0; Sd)
123 (34-0-0; Sd)
28 (34-0-0) + RC
RC
1990
Soybean 1 or
corn 2
0
0
28 (34-0-0) + CC
CC
1991
Corn 1 or
soybean 2
123 (34-0-0; Sd)
123 (34-0-0; Sd)
0
0
1992
Soybean 1 or
wheat 2
0
0
28 (34-0-0) + RC
RC
1993
Corn
28 (UAN; Pl)
84 (34-0-0; Sd)
28 (UAN; Pl)
84 (34-0-0; Sd)
28 (UAN; Pl) + CC
CC
1994
Soybean
0
0
0
0
1995
Wheat
56 (34-0-0)
56 (34-0-0)
28 (34-0-0) + RC
RC
1996
Corn
28 (UAN; Pl)
135 (34-0-0; Sd)
28 (UAN; Pl)
135 (34-0-0; Sd)
28 (UAN; Pl) + CC
CC
1997
Soybean
0
0
0
0
1998
Wheat
56/(34-0-0)
56 (34-0-0)
28 (34-0-0) + RC
RC
1999
Corn
28 (UAN; Pl)
87 (34-0-0; Sd)
28 (UAN; Pl)
87 (34-0-0; Sd)
28 (UAN; Pl) + CC
CC
2000
Soybean
0
0
0
0
2001
Wheat
78 (UAN; split)
78 (UAN; split)
47 (UAN) + RC
RC
2002
Corn
30 (19-17-0; Pl)
125 (UAN; Sd)
30 (19-17-0; Pl)
125 (UAN; Sd)
30 (19-17-0; Pl) + RC
RC
2003
Soybean
0
0
0
0
2004
Wheat
36 (19-19-19; Pl)
54 (UAN; Sd)
36 (19-19-19; Pl)
54 (UAN; Sd)
54 (UAN; Sd) + RC
RC
2005
Corn
34 (19-17-0) Pl
123 (UAN) Sd
34 (19-17-0) Pl
123 (UAN) Sd
34 (19-17-0; Pl) + RC
RC
2006
Soybean
0
0
0
0
2007
Wheat
35 (19-19-19; Pl)
54 (UAN; Sd)
35 (19-17-0; Pl)
54 (UAN; Sd)
54 (UAN; Sd) + RC
RC
2008
Corn
33 (19-17-0; Pl)
113 (UAN; Sd)
33 (19-17-0; Pl)
113 (UAN; Sd)
33 (19-17-0; Pl) + RC
RC
2009
Soybean
0
0
0
0
2010
Wheat
89 (UAN; split)
89 (UAN; split)
50 (UAN) + RC
RC
a From 1989 to 1992, different crops were grown in the Conventional and No-till systems (denoted as superscript 1) than
in the Reduced Input and Biologically Based systems (denoted as superscript 2).
b Nitrogen was applied as ammonium nitrate (N-P-K content: 34-0-0, or 19-17-0, or 19-19-19) and urea ammonium
nitrate (UAN; 28% N) at planting (Pl) and/or as a side-dressing (Sd). For wheat, a split application of UAN was applied
in some years.
c Cover crops were red clover (RC, Trifolium pratense L.) and crimson clover (CC, Trifolium incarnatum L.) which are
grown prior to corn and plowed under before planting in spring. Wilke (2010; Table 14) estimated aboveground N in red
clover at spring harvest as 67 and 59 kg N ha −1 in the Reduced Input and Biologically Based systems, respectively. No
data available for crimson clover.
 
Search WWH ::




Custom Search