Accession Number : ADP002023

Title :   Cultural and Environmental Effects on Crop Spectral Development Patterns as Viewed by LANDSAT,


Personal Author(s) : Crist,E. P.

Report Date : JUN 1982

Pagination or Media Count : 10

Abstract : The typical patterns of spectral development (profiles) for corn and soybeans are presented, based on field-collected reflectance data transformed to correspond to Landsat-MSS Tasseled Cap coordinates. Reasonable variations in field conditions and cultural practices are shown to significantly influence profile features. The separability of two crops is determined to be primarily related to the maximum value of the reflectance equivalent of Greenness, and to the plateau effect seen in corn Greenness profiles. The impact of changes in conditions on separability is described. In addition, association is made between profile features and stages of development for corn and soybeans. Corn is shown to peak at a stage well before tasseling or maximum LAI, while the characteristics of the soybean profile are shown to be unrelated to any particular stage of development. (Author)

Descriptors :   *Farm crops, Aerial photography, Multiband spectral reconnaissance, Scientific satellites, Light, Green(Color), Reflectance, Growth(Physiology), Profiles, Image processing

Distribution Statement : APPROVED FOR PUBLIC RELEASE