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 YP 0 Predict YP N based on RI Fertilizer N = (GNUP-FNUP)/ YP N <= YP MAX 2001

Idealized 16 Step Calibration Ramp NRich NDVI Field Rate NDVI Ramp Max or Upper Limit N Application Rate YP0 YPMax

Calculating N Rate Using the RAMP Ramp N Rates, lb/ac NDVI Determine Transition Curve Determine Plateau Optimum Fall Applied N Rate Calculating Topdress N Rate

Which Part of the Ramp Do We Measure? Sense Do Not Sense

Preliminaries Start Icon for Ramp Mobile Analysis program Found under Programs Ramp Configuration Files *.txt Found under My Device, My Documents, Ramp Config Files NTech Capture Sensed Ramp Files *.txt Store in My Device, My Documents, Ramp Sensed Files Analyzed Ramp Output Files *.txt Save 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 “ _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 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