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

<p>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.</p>

<p>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.</p>

<ul>
<li>The Exotech 20C-SW data file is 781804.001.txt</li>
<li>The Exotech 100 data file is 781804.051.txt</li>
</ul>

<p>The test took place in 1978.</p>

<p>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.</p>

<p>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.</p>