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Record Details

Record 48 of 9988
Spectral estimators of absorbed photosynthetically active radiation in corn canopies
External Online Source: doi:10.1016/0034-4257(85)90096-3
Author and Affiliation:
Gallo, K. P.(Cornell University, Ithaca, NY)
Daughtry, C. S. T.(Purdue University, West Lafayette, IN, United States)
Bauer, M. E.(Minnesota, University, St. Paul, MN)
Abstract: Most models of crop growth and yield require an estimate of canopy leaf area index (LAI) or absorption of radiation. Relationships between photosynthetically active radiation (PAR) absorbed by corn canopies and the spectral reflectance of the canopies were investigated. Reflectance factor data were acquired with a Landsat MSS band radiometer. From planting to silking, the three spectrally predicted vegetation indices examined were associated with more than 95 percent of the variability in absorbed PAR. The relationships developed between absorbed PAR and the three indices were evaluated with reflectance factor data acquired from corn canopies planted in 1979 through 1982. Seasonal cumulations of measured LAI and each of the three indices were associated with greater than 50 percent of the variation in final grain yields from the test years. Seasonal cumulations of daily absorbed PAR were associated with up to 73 percent of the variation in final grain yields. Absorbed PAR, cumulated through the growing season, is a better indicator of yield than cumulated leaf area index. Absorbed PAR may be estimated reliably from spectral reflectance data of crop canopies.
Publication Date: Jun 01, 1985
Document ID:
19850056239
(Acquired Nov 28, 1995)
Accession Number: 85A38390
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Journal Article
Publication Information: Remote Sensing of Environment (ISSN 0034-4257); 17; 221-232
Publisher Information: United States
Contract/Grant/Task Num: NAS9-16528
Financial Sponsor: NASA; United States
Organization Source: Cornell Univ.; Ithaca, NY, United States
Purdue Univ.; West Lafayette, IN, United States
Minnesota Univ.; Saint Paul, MN, United States
Description: 12p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CANOPIES (VEGETATION); CORN; CROP GROWTH; PHOTOSYNTHESIS; RADIATION ABSORPTION; SPECTRAL REFLECTANCE; BIOLOGICAL MODELS (MATHEMATICS); EARTH RESOURCES PROGRAM; LANDSAT SATELLITES; LEAF AREA INDEX; MULTISPECTRAL BAND SCANNERS; PYRANOMETERS; RADIOMETERS; SOILS; SOLAR RADIATION
Imprint And Other Notes: Remote Sensing of Environment (ISSN 0034-4257), vol. 17, June 1985, p. 221-232. Previously announced in STAR as N85-16242.
Miscellaneous Notes: Previously announced in STAR as N85-16242
Availability Source: Other Sources
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