Development and validation of canopy reflectance-based crop coefficient for potato

Harikishan Jayanthi, Christopher M.U. Neale, James L. Wright

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


The present paper describes the development and validation of canopy reflectance-based crop coefficients for potato using canopy reflectance (measured using hand-held radiometers and high resolution multispectral digital imagery), and extensive crop biophysical sampling in selected potato growing fields in and around Kimberly, Idaho, during 1998 and 1999 seasons. Daily crop evapotranspiration was estimated using basal and canopy reflectance-based crop coefficients, and a hydrologic water balance was conducted in the plant root zone. Independent measurements of actual soil moisture measurements were made by neutron probe and gravimetric methods, and used to validate the simulated results. The results validate the reflectance-based crop coefficient method. High resolution multispectral aerial imagery was used to highlight the spatial variability of actual crop water demand in the study fields.

Original languageEnglish (US)
Pages (from-to)235-246
Number of pages12
JournalAgricultural Water Management
Issue number1-3
StatePublished - Mar 16 2007
Externally publishedYes


  • Basal crop coefficients
  • Canopy reflectance-based crop coefficients
  • Crop evapotranspiration
  • Neutron probe
  • SAVI
  • Soil water content

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Water Science and Technology
  • Soil Science
  • Earth-Surface Processes


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