English Metric - Ag Leader Technology

2013
Product Catalog
DirectCommand
1
0.9
Many crop sensors use NDVI (Normalized
Difference Vegetation Index) to determine the health of the
plant. NDVI measures red and near infrared wavebands to
detect health, which works well in early stage plant growth
when soil can be seen between the crops. The graph above
shows that NDVI changes significantly between healthy and
weak crops in early growth states.
However, as the crop reaches complete cover,
NDVI is no longer effective in determining the weaker crops
from the healthier crops. The graph above shows that NDRE
(Normalized Difference Red Edge) is a better indicator of
differences between stronger and weaker crops at later
growth stages. Because OptRx uses both NDVI and NDRE,
it provides a more accurate view of plant vigor at all of the
crops stages of growth.
Vegetation Index
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
NDVI
NDRE
0
1 2 3 4 5 6
Leaf Area Index(LAI)
Three years use of OptRx, with its unique dualsensing
technology, in European wheat fields have proven
its approach to adjust nitrogen rates on-the-go have shown
an average decrease of nitrogen rates near 2 kilograms
per hectare while increasing yields by an average of 200
kilograms per hectare.
The Math:
1
Estimated nitrogen
savings per hectare 0.9
Number of hectares 0.8
X
Estimated wheat yield
increase per hectare
Number of hectares
X
Total ROI
If you estimate nitrogen to cost €0.50 and
wheat is sold at €250.00/ton, OptRx averaged €51.00
per hectare profits. For a 2 sensor system, that is a ROI
in less than 250 hectares. Do your own math. In the table
provided add up your total in nitrogen savings and total
in yield savings. How long before you are getting profits
from OptRx?
Vegetation Index
0.7
0.6
0.5
0.4
0.3
0.2
+ =
NDRE
NDVI
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2013 Ag Leader | 29