Operating the Oklahoma State Univ. Ramp Mobile Analysis V2.0

Oklahoma State Univ. Ramp Mobile Analysis V2.0 Main Menu

NRich Strip Analysis with the OSU Sensor Based NRich Strip Calculator (SBNRC)

Ramp Analysis with the Ramp Analyzer and the Sensor Based NRich Strip Calculator

English or Metric Units

Nitrogen Rate Calculation Options

RAMP analysis only

RAMP + Sensor Based Nitrogen Rate Calculator

N Rich strip analysis using the Senor Based Nitrogen Rate Calculator (SBNRC)

Algorithm to Calculate N Rate with SBNRC

1

2

Predict RI

Predict YP0

Predict YPN based on RI

Fertilizer N = (GNUP-FNUP)/0.5

3

4

1

2

3

4

YPN <= YPMAX2001

Idealized 16 Step Calibration Ramp

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

Ramp N Rates, lb/ac

ND

VI

NRich NDVIField Rate NDVI

Ramp Max or Upper Limit N Application Rate

YP

0Y

PM

ax

Calculating N Rate Using the RAMP

00.10.20.30.40.50.60.70.8

013

.326

.734

.053

.366

.780

.093

.310

6.712

0.013

3.314

6.716

0.017

3.318

7.720

0.0

Ramp N Rates, lb/ac

ND

VI

Determine Transition Curve

Determine Plateau

Optimum Fall Applied N Rate

Calculating Topdress N Rate

tlnpreptlnprep

topdresstopdress NRate

NUE

NUENRate

Which Part of the Ramp Do We Measure?

200 0

13.3

26.7

34.0

53.3

66.7

80.0

93.3

106.7

120.0

133.3

146.7

160.0

173.3

187.7

200.0

SenseDo Not Sense

Preliminaries

Start Icon for Ramp Mobile Analysis program

Found under ProgramsRamp Configuration Files *.txtFound under My Device, My Documents, Ramp Config Files

NTech Capture Sensed Ramp Files *.txtStore in My Device, My Documents, Ramp Sensed Files

Analyzed Ramp Output Files *.txtSave in My Device, My Documents, Ramp Analyzed Files

Keep your HP Ipaq computer battery charged. This program along with the Microsoft program “.Net 2 Compact Framework” are stored in RAM. If the battery runs down, you will need to download “.Net 2 Compact Framework” from Microsoft, copy and install “Ramp Mobile Analysis” from our website and recreate the file structure.

There is a routine in the program to screen false triggers, but it will not screen out false triggers held longer than three seconds.

“Algorithm Data Jan 08.csv”Found under My Device, My Documents, Ramp Config Files

Help, About the Program

Basic Instructions on How to Run the Calibration Ramp Analyzer Program

Instructions are located under the Help, How to Run Pgrm menu commands

Return to the main form.

Load or Create a Ramp Configuration File

You will need to load a ramp confguration file before you can analyze the data with either the Ramp calculator or the Ramp & Sensor Based Nitrogen Rate Calculator (SBNRC). There are two OSU ramp configuration files loaded on your computer: a) the “2006 16_Step Ramp.txt” for the 170 ft ramps and b) the “2006 8_Step Ramp.txt” file for the 90 ft long ramps.

If you are sensing a ramp not created by the OSU ramp applicators you will need to create and save a ramp configuration file. This routine can be accessed through the RAMP + SBNRC analysis form.

Creating Ramp Configuration Files

1 02 13.33 26.6

16

4 39.9

After entering the ramp step number and the step N

Listing of ramp numbers and rates entered into the program

After entering all of the values for the ramp steps, save the ramp configuration file. Saving the file will also load it into the prgram.

You can return to the main form at any time

If you are using a ramp not created by the OSU ramp applicators, you will need to use this form to create a ramp configuration file.

Field Settings – Required to Analyze N Rich Strips and Ramp Using the SBNRC

Number of Growing Degree Days from planting to one day prior to the sensing date. GDD can be obtained from the “NUE.Okstate.edu” web site

The farmer or land owner estimate of the maximum likely yield in bu/ac or kg/ha.

Expected Nitrogen Use Efficiency at topdress. The default is 50%. The Preplant NUE is typically about 33 % Normally, do not change these values.

Select crop algorithm from pull down menu

The SBNRC applied to the NRich Strip also estimates the value of the crop with the N Rate computation as well as the gross return with and without fertilizer. Enter current grain and fertilizer prices

You will be prompted to load the algorithm file. Select “AlogrithmData Jan 08.csv”

Ramp Analysis File Menu

Prior to analyzing the data you must load an NTech Capture sensed ramp data file.

After you have completed your analysis of each field, save the output file to your computer.

You can load and analyze more than one field before exiting the Ramp_Mobile_Analyzer program.

To return to the main menu select Return

& SBNRC

Main Form – OSU Ramp Analysis Output

Response Index =YP0 NDVI/ YPmax NDVI

N Rate (lb/ac) calculated based on ramp NDVI measurements

N Rate (lb/ac) calculated with SBNRC

Analyze Button

Field Rate NDVI

NRich NDVI

Yield (bu/ac or kg/ha) with no additional N calculated with SBNRC

Yield (bu/ac or kg/ha) with topdress N calculated with SBNRC

Calibraton Ramp Analyzer Output