COMPARISON OF ELEVEN VEGETATION INDICES FOR ESTIMATING PLANT HEIGHT OF ALFALFA AND GRASS

A great variety of vegetation indices, derived from remote sensing measurements, are commonly used to characterize the growth pattern of cropped surfaces. In this study, multispectral canopy reflectance data were obtained from grass (Festuca arundinacea) and alfalfa (Medicago sativa L.) at Kimberly, Idaho, with the purpose of comparing the performance of 11 vegetation indices for estimating plant height of these two structurally different crop canopies. An additional purpose was to develop quantitative relationships between plant height and the different vegetation indices, which could be used to estimate plant height from remote sensing inputs. For alfalfa, good logistic growth relationships between plant height and all the different vegetation indices were found. The relationship resulted in r2 > 0.90 for all the vegetation indices, and r2 > 0.97 for most of them. While all the vegetation indices were very sensitive to changes in plant height at the beginning of the growing cycle, the Normalized Difference Vegetation Index (NDVI), the Infrared Percentage Vegetation Index (IPVI), and the Transformed Vegetation Index (TVI) became insensitive to additional plant growth when alfalfa reached heights of 0.45, 0.40, and 0.45 m, respectively. All the other vegetation indices performed reasonably well for the entire range of alfalfa plant heights considered in this study ( 2 ~ 0.76).

[1]  M. S. Moran,et al.  Field calibration of reference reflectance panels , 1987 .

[2]  P. Pinter,et al.  Estimating cotton evapotranspiration crop coefficients with a multispectral vegetation index , 2003, Irrigation Science.

[3]  E. J. Brach,et al.  Bidirectional reflectance of crops and the soil contribution , 1979 .

[4]  Philip N. Slater,et al.  Discrimination of growth and water stress in wheat by various vegetation indices through clear and turbid atmospheres , 1983 .

[5]  A. J. Richardson,et al.  Vegetation indices in crop assessments , 1991 .

[6]  Anthony Morse,et al.  Evapotranspiration from a satellite-based surface energy balance for the Snake Plain Aquifer in Idaho. , 2002 .

[7]  S. Idso,et al.  Estimation of grain yields by remote sensing of crop senescence rates. , 1980 .

[8]  C. Perry,et al.  Functional equivalence of spectral vegetation indices , 1984 .

[9]  A. Huete,et al.  A review of vegetation indices , 1995 .

[10]  R. Crippen.  Calculating the vegetation index faster , 1990 .

[11]  J. Roujean,et al.  Estimating PAR absorbed by vegetation from bidirectional reflectance measurements , 1995 .

[12]  C. Tucker.  Red and photographic infrared linear combinations for monitoring vegetation , 1979 .

[13]  W. Bausch,et al.  Crop Coefficients Derived from Reflected Canopy Radiation: A Concept , 1987 .

[14]  Jerry L. Hatfield,et al.  Intercepted photosynthetically active radiation estimated by spectral reflectance , 1984 .

[15]  Philip N. Slater,et al.  Mapping surface energy balance components by combining landsat thematic mapper and ground-based meteorological data , 1989 .

[16]  Prasad S. Thenkabail,et al.  Landsat Thematic Mapper Indices for Evaluating Management and Growth Characteristics of Soybeans and Corn , 1992 .

[17]  K. J. Sene,et al.  Parameterisations for energy transfers from a sparse vine crop , 1994 .

[18]  C. B. Tanner,et al.  Evapotranspiration from a Snap Bean Crop1 , 1970 .

[19]  Brent Clothier,et al.  ESTIMATION OF SOIL HEAT FLUX FROM NET RADIATION DURING THE GROWTH OF ALFALFA , 1986 .

[20]  Sandra Lach Arlinghaus,et al.  Practical Handbook of Curve Fitting , 1994 .

[21]  J. R. Thomas,et al.  Estimating Nitrogen Content of Sweet Pepper Leaves by Reflectance Measurements1 , 1972 .

[22]  C. J. Tucker,et al.  Spectral assessment of soybean leaf area and leaf biomass , 1980 .

[23]  A. Huete,et al.  Dependence of NDVI and SAVI on sun/sensor geometry and its effect on fAPAR relationships in Alfalfa , 1995 .

[24]  Compton J. Tucker,et al.  Post senescent grass canopy remote sensing , 1978 .

[25]  Compton J. Tucker,et al.  Monitoring corn and soybean crop development with hand-held radiometer spectral data , 1979 .

[26]  E. B. Knipling.  Physical and physiological basis for the reflectance of visible and near-infrared radiation from vegetation , 1970 .

[27]  W. Beckman,et al.  Solar Engineering of Thermal Processes , 1985 .

[28]  A. Huete.  A soil-adjusted vegetation index (SAVI) , 1988 .

[29]  E. Kanemasu.  Seasonal canopy reflectance patterns of wheat, sorghum, and soybean , 1974 .

[30]  M. S. Moran,et al.  Diurnal trends in wheat canopy temperature, photosynthesis, and evapotranspiration , 1994 .

[31]  A. Huete,et al.  A Modified Soil Adjusted Vegetation Index , 1994 .

[32]  R. Waring,et al.  The normalized difference vegetation index of small Douglas-fir canopies with varying chlorophyll concentrations , 1994 .