Loading...
Please wait, while we are loading the content...
Similar Documents
Optical parameters of leaves of seven weed species (Document No: 19820016670)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Walter, H. Richardson, A. J. Rodriguez, R. R. Gausman, H. W. Menges, R. M. |
| Copyright Year | 1982 |
| Description | Absorption coefficient (k), infinite reflectance (R inf.) and scattering coefficient (s) were tabulated for five wavelengths and analyzed for statistical differences for seven weed species. The wavelengths were: 0.55, 0.65, 0.85, 1.65, and 2.20 microns. The R inf. of common lambsquarters (Chenopodium album L.), johnsongrass (Sorghum halepense L. Pers.), and annual sowthistle (Sonchus oleraceus L.) leaves at the 0.85 micron wavelength were significantly (p = 0.05) higher than for sunflower (Helianthus annuus L.), ragweed parthenium (parthenium hysterophorus L.), or London rocket (Sisymbrium irio L.). Annual sowthistle had the largest k value, and Palmer amaranth (Amaranthus palmeri S. Wats.) had the smallest k value at the 0.65 micron chlorophyll absorption wavelength. In general, johnsongrass, ragweed parthenium, and London rocket had the largest s values among the five wavelengths, whereas annual sowthistle and Palmer amaranth were usually lowest. |
| File Size | 425780 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820016670 |
| Archival Resource Key | ark:/13960/t7zm05k7p |
| Language | English |
| Publisher Date | 1982-03-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Leaves Earth Resources Program Agristars Project Moisture Content Spectral Signatures Scattering Coefficients Absorptivity Spectral Reflectance Crop Identification Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
