Transcript Cotton Yield Map

Help farmers make
some money, and they
will share it with you.
Ellsworth Fanning
The Glory of the farmer is that,
in the division of labors,
it’s his part to create.
Emerson
1
Soil Sampling
the old
fashioned way
2
1
2
L
Medium
VL
Too Sweet is as
bad as too sour
UNDER
OVER
OVER
is as bad as
UNDER
UNDER
Blanket
Rate
OVER
OVER
As pH increased, Cotton Yield
decreased
7.6
6.8
6.0
873 – 1082
1083-1194
1195 –1303
1304 – 1421
Cotton Yield
1422 - 1656
As the pH increased,
Yield decreased
50
pH
6.8
pH
60
6.7
6.6
Yield (lbs/A)
70
80
6.5
90
6.4
100
6.3
110
6.2
120
1
130
6.1
Yield (lbs/A)
2
3
4
5
6
7
8
9
6
Nutrient
availability is
pH dependent
Soil pH
4.0
Zn
(ppm)
412
5.0
4.12
6.0
0.0412
7.0
0.00041
8.0
0.000004
Mn Toxicity
5.0
Mn Deficient
7.5
Too High K K
is as
detrimental
as Too Low K
Surface
Map
404
K - Mg Antagonism
163
Too Much is as bad as Too Little
% Potassium
% Magnesium
K – Mg antagonism
Too Much P is as bad as Too Little P
Low
Too Much P is as bad as Too Little P
P- Zn antagonism
Cotton
Cotton Yield Map
500 to 1300
lbs/A
You will never be able to
eliminate all variability.
You just should manage it as
good as you can with the
existing technology
Grid
Sampling
Sampling
every 2.5
acres
Creating Management
zones by using
electrical
conductivity
Larinburg, NC
May 2006
Electrical Conductivity
Two Depth
Readings
Shallow
0-12”
Deep
0-36”
One pair of coulter-electrodes injects electrical current
into the soil, while two other pairs of coulter-electrodes
measure the voltage drop.
How it works…
• Veris travels at
regular intervals
throughout a field.
• Data is then used to
create a
Management Zone
map.
• Soil Sampling Sites
can be placed
according to
variability.
Veris Machine
0 to 12”
Larinburg, NC
May 2006
0 to 36”
Larinburg, NC
May 2006
Top soil and sub-soil may be somewhat different
Shallow
Deep
Top soil and sub-soil are similar
Shallow
Deep
3 Zones
5 Zones
0 to 12”
Larinburg, NC
May 2006
EC Map
Yazoo City
4/10/06
Vari-Soil
Yazoo City
4/10/06
Vari-Soil
Yazoo City
4/10/06
You can go
beyond
VRT
Negative
Correlation
Take Home Message
NONE
Take the
money
from here
Ag Lime
500 - 1500
Put that
money
here
1500 - 2000
It’s all about
prioritizing resources
2000 - 3000
3000 5000
Soil Types
Vari-Soil
EC Maps
Yield Maps
Experience
Variable Rate N is going to be big
Green Seeker
NDVI
Organic Matter
Imagery
Cotton
Take a little
N off here
Put it here
His Legacy is Land.
May he find it as
beautiful and bountiful
as his forefathers did.
“Life is like a dog sled team.
If you ain’t the lead dog,
the scenery never changes.”
Lewis Grizzard