You may have heard that PURR may be down temporarily this Thursday (10/17) for maintenance. The maintenance is being rescheduled, and we do not expect to have any downtime this week. We will let you know when the maintenance has been rescheduled. close

Purdue Agronomy Farm Soybean, Potassium, and Phosphorous (781804)

Listed in Datasets

By Craig S. T. Daughtry

The purpose of this experiment was to examine the effects of different levels of soil phosphorous and potassium on the reflectance and radiant temperatures of soybeans.

Additional materials available

Version 1.0 - published on 21 Apr 2015 doi:10.4231/R75X26VZ - cite this Archived on 25 Oct 2016

Licensed under CC0 1.0 Universal

Description

The purpose of this experiment was to examine the effects of different levels of soil phosphorous and potassium on the reflectance and radiant temperatures of soybeans. Plots for data collection were selected from a long term experiment.

Measurements of reflectance and radiant temperature of the soybean canopies were made with the Exotech 20C field spectroradiometer system and the Exotech 100 Landsat band field radiometer system at approximately 7-10 day intervals throughout the growing season. Agronomic characterizations of the canopies included: leaf area index, biomass, percent soil cover, height, development stage, and grain yield. Vertical and oblique photographs were also taken of the canopies.

  • The Exotech 20C-SW data file is 781804.001.txt
  • The Exotech 100 data file is 781804.051.txt

The test took place in 1978.

The supporting docs include a brief summary of used instruments, a wavelength table (Wavelength_ASCII.txt), reflectance note and reflectance tables (ReflectanceTable206.txt and ReflectanceTableMulti.txt), and file format description (ExperimentDataFormat3.txt). The format description file is in ASCII format in lines of 80 characters.

This research dataset is part the Field Research Data Library that consists of over 200,000 spectral observations of soils and vegetation that have been collected since 1972 till 1991 as part of the research focused on vegetation and soils at the Laboratory for Applications of Remote Sensing (LARS) located at the Purdue University.

Cite this work

Researchers should cite this work as follows:

Tags

Notes

  • Location: Purdue Agronomy Farm, West Lafayette, IN
  • County: Tippecanoe
  • Latitude/Longitude: 0402813N 0865927W
  • Illumination: Solar
  • Spectrometer: Exotech 20C-SW (Wavelength Range: 0.40-2.40 um)
  • Landsat MSS Band Radiometer: Exotech 100 (Wavelength Range: 0.50-1.10 um)
  • Experiment Type: Crops - Corn
The Purdue University Research Repository (PURR) is a university core research facility provided by the Purdue University Libraries, the Office of the Executive Vice President for Research and Partnerships, and Information Technology at Purdue (ITaP).