Purdue Agronomy Farm Soil Background (791807)

<p>The purpose of this experiment was to determine the effects of soil background (soil color, soil moisture, soil roughness) on the spectral response of corn. The treatments were:</p>

<ul>
<li>2 surface moisture levels (moist and dry)</li>
<li>2 surface tillage conditions (rough and smooth)</li>
</ul>

<p>Two replications were used in a randomized complete block design. Spectral reflectance measurements were made with a Landsat band radiometer (Exotech 100). Radiant temperature and overhead color photographs of the canopies were obtained simultaneously with the reflectance measurements. Oblique color photographs were also obtained. The agronomic measurements of the plots included crop growth stage, percent soil cover, plant height, leaf area index, plant biomass, and surface soil moisture and condition. Grain yields were measured at harvest time.</p>

<p>The test took place in 1979.</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>