Improved algorithms for corn stand assessment
Flown by John Scott, Digital Agriculture Extension Coordinator, Purdue Extension
Three plant health maps were compared alongside RGB to determine if additional sensors would result in a complete map for better decision-making. While the NDVI appears to showcase the most detail, we still need to conduct more research and ground-truthing. We will continue exploring different plant health indices to see how each tool fits into management strategies.
Corn, Soybean and Wheat Examples
![Image of Three plant health maps were compared alongside RGB](_media/stand-count-r-1x1.jpg)
Three plant health maps were compared alongside RGB to determine if additional sensors...
![Image of visual red light and near-infrared (NIR) light and is a trusted indicator of plant health](_media/infieldndvi-corn.jpg)
Three plant health maps were compared alongside RGB to determine if additional sensors would...
![Image of a drone fertilizing a cornfield](_media/drone-on-field.jpg)
This DJI Agras spray drone is designed for precision variable rate application of liquid...
![Image of a tractor passing through a cornfield](_media/tractor-on-a-field.jpg)
A non-chemical weed suppression technique using electricity to boil water in plant cells causes...
![Image of a tractor working on a cornfield](_media/tractor-cornfield.jpg)
Flame weeding is a practice that organic farmers can use to control grass and broadleaf weeds in...
![Image of crops from above](_media/overview-cornfield-uav-image.jpg)
A severe storm passed through White County, Ind. in July 2020, causing...
![Image of a soil map that shows premature leaf drop triggered the detection of the fungus Cercospora kikuchii](_media/cercospora-raw.png)
Premature leaf drop triggered the detection of the fungus Cercospora kikuchii which attacks...
![Image of a tar spot discovered at a Purdue irrigation research plot](_media/field-tar-spot-aerial.jpg)
Tar spot was discovered at a Purdue irrigation research plot and monitored by Darcy Telenko,...
![Image of a crop health map of the field taken around stage R3](_media/warren-crop-health-maps.jpg)
A Warren County farmer was interested in understanding differences between tillage, other field...
![Image of a cornfield from high above, a red streak in the middle indicates problems with certain hybrid.](_media/corn-hybrids-planthealth.jpg)
The red streak in the middle of this field near the Ivy Tech Community College site in Lafayette...
![Image from a field taken by a drone from up high](_media/carter_rgb-map-series.jpg)
A map series was generated during testing of the Quantix fixed-wing UAV in 2019. The fixed-wing...
![aerial image of a wheat field](_media/wheat-streaking-aerial.jpg)
Flown May 2018 by Mark Carter, Agriculture & Natural Resources Educator, Purdue Extension...
![Image of a plot showing differences in drained and undrained areas](_media/planted-only-and-disced-and-planted.jpg)
Pattern tile installation occurred on this field during winter 2020-21 with 50-foot lateral spans...
![Elevation mapping demonstrates clear ridges and drops](_media/landscapeele-v2.jpg)
Drones are not only effective at recording plant health, but also at detecting how land features...