the comparison of red greenseeker and crop circle in a sugar beet canopy
DESCRIPTION
The Comparison of Red Greenseeker and Crop Circle in a Sugar Beet Canopy. John A. Lamb University of Minnesota and Mark W. Bredehoeft Southern Minnesota Beet Sugar Cooperative. Sugar beet top yield 2004. Y = -11402 + 20665 X r = 0.34*. Y = -11157 + 18705 X r = 0.62**. - PowerPoint PPT PresentationTRANSCRIPT
NUE 2006
The Comparison of Red Greenseeker and Crop Circle in a
Sugar Beet CanopyJohn A. Lamb
University of Minnesotaand
Mark W. BredehoeftSouthern Minnesota Beet Sugar Cooperative
NUE 2006
0
2000
4000
6000
8000
10000
0.7 0.75 0.8 0.85 0.9
NVDI 9/16/04
To
p y
ield
(lb
/A)
Sugar beet top yield 2004
Y = -13397 + 19142 X r = 0.40**
Y = -11157 + 18705 X r = 0.62**
Y = -11402 + 20665 X r = 0.34*
NUE 2006
TW Clara City 0 NNDVI = 0.66 C.V. = 10%
TW Clara City 130 NNDVI = 0.84 C.V. = 2%
July 13, 2005
NUE 2006
Objectives
• Determine if sensors can predict sugar beet canopy near time of harvest.
• Compare the red greenseeker and crop circle sensors for sugar beet canopy.
NUE 2006
Methods
NUE 2006
Methods
• 3 locations with small plots
• 3 varieties
• 5 to 6 N rates
• Harvest sugar beet tops and determine dry matter for each plot.
NUE 2006
Correlations (r)
DM G7/13 G7/28 G8/9 G9/15 G9/27 C9/15 C9/27
DM 0.45 0.37 0.64 0.65 0.64 0.60 0.51
G7/13 0.91 0.56 0.23 0.10 0.49 0.08
G7/28 0.44 0.19 -0.03 0.51 0.01
G8/9 0.67 0.67 0.65 0.63
G9/15 0.92 0.82 0.83
G9/27 0.88 0.90
C9/15 0.71
NUE 2006
Correlation between GS and CC
0.4
0.5
0.6
0.7
0.8
0.9
1
0.4 0.5 0.6 0.7 0.8 0.9 1
NDVI (Greenseeker)
ND
VI (
Cro
p C
irc
le)
TW915
BL915
1:1 line
r = 0.82
NUE 2006
Top DM and NDVI (GS)
0
2000
4000
6000
8000
0.4 0.5 0.6 0.7 0.8 0.9 1
NDVI (Greenseeker)
To
p d
ry m
att
er
(lb
/A)
TW915
BL05
r = 0.63
NUE 2006
Top DM and NDVI (CC)
0
2000
4000
6000
8000
0.4 0.5 0.6 0.7 0.8 0.9 1
NDVI (Crop Circle)
To
p d
ry m
att
er
(lb
/A)
TW915
BL05
r = 0.60
NUE 2006
TW site 2005Variety DM (lb/A) NDVI (GS) NDVI (CC)
1 3767 0.79 0.682 3892 0.80 0.683 4047 0.81 0.69
N rate (lb/A)
0 3340 0.79 0.6690 3737 0.80 0.68
110 3836 0.80 0.69130 4450 0.82 0.70150 4147 0.80 0.68
NUE 2006
BL site 2005Variety DM (lb/A) NDVI (GS) NDVI (CC)
1 3711 0.81 0.682 3370 0.79 0.653 3779 0.83 0.69
N rate (lb/A)
0 3048 0.80 0.6770 3127 0.80 0.6790 3556 0.81 0.67
110 3921 0.82 0.68130 3931 0.82 0.68150 4095 0.82 0.69
NUE 2006
Conclusions
• There is a relationship between Top DM and NDVI as measured by sensors.
• The sensors, while not producing the same NDVI numbers, work similarly in predicting Top DM.
NUE 2006
NUE 2006
Questions????
NUE 2006
strip1
0
0.2
0.4
0.6
0.8
1
44.582 44.583 44.584 44.585 44.586
South to North
ND
VI (
GS
)
strip1
Strip 1
00.1
0.20.30.4
0.50.6
0.70.8
44.970 44.971 44.972 44.973 44.974 44.975 44.976 44.977
South to North
ND
VI (
CC
)
Strip 1