TY - GEN
T1 - Significance of emergence date in canopy reflectance-based crop coefficient (K cr) formulation
AU - Jayanthi, Harikishan
AU - Neale, Christopher M.U.
AU - Lal, Deepak
PY - 2006
Y1 - 2006
N2 - In the development of canopy reflectance-based crop coefficient (K cr), the soil adjusted vegetation index values of bare soil and 'effective' full cover canopy reflectances are linearly transformed using the corresponding basal (K cb) crop coefficients. This approach has been validated for alfalfa, barley, beans, corn, cotton, potato, sugar beet, and wheat. The basal (K cb) crop coefficient curve assumes uniform ideal crop growth in the field however the actual crop development calls for systematic adjustments of the K cb curve to match the actual growth profile. In the present paper, different instances of variability in actual crop growth are presented. The corresponding influence on the end points of K cb-SAVI linear transformation has been studied using the actual seasonal crop canopy reflectance curves of beans, potato, and sugar beet crops. This data was collected as a part of a multi-year research study towards development of corresponding canopy reflectance-based crop coefficients (K cr), Kimberly, Idaho during 1998 and 1999 seasons.
AB - In the development of canopy reflectance-based crop coefficient (K cr), the soil adjusted vegetation index values of bare soil and 'effective' full cover canopy reflectances are linearly transformed using the corresponding basal (K cb) crop coefficients. This approach has been validated for alfalfa, barley, beans, corn, cotton, potato, sugar beet, and wheat. The basal (K cb) crop coefficient curve assumes uniform ideal crop growth in the field however the actual crop development calls for systematic adjustments of the K cb curve to match the actual growth profile. In the present paper, different instances of variability in actual crop growth are presented. The corresponding influence on the end points of K cb-SAVI linear transformation has been studied using the actual seasonal crop canopy reflectance curves of beans, potato, and sugar beet crops. This data was collected as a part of a multi-year research study towards development of corresponding canopy reflectance-based crop coefficients (K cr), Kimberly, Idaho during 1998 and 1999 seasons.
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M3 - Conference contribution
AN - SCOPUS:84867810699
SN - 9781604236057
T3 - American Society for Photogrammetry and Remote Sensing - 20th Biennial Workshop on Aerial Photography, Videography, and High Resolution Digital Imagery for Resource Assessment 2005
SP - 38
EP - 49
BT - American Society for Photogrammetry and Remote Sensing - 20th Biennial Workshop on Aerial Photography, Videography, and High Resolution Digital Imagery for Resource Assessment 2005
T2 - 20th Biennial Workshop on Aerial Photography, Videography, and High Resolution Digital Imagery for Resource Assessment 2005
Y2 - 4 October 2005 through 5 October 2005
ER -