Íslenskar landbúnaðarrannsóknir - 01.03.1980, Page 27

TEST OF A HAND-HELD RADIOMETER 25
REFERENCES
Mitchell, J. E., 1972, „An analysis of the Beta-at-
tenuation technique for estimating standing crop
of prairie range,“J. Range Manage. 25 (4) : 300 -
304.
Neal, D. L., and J. L. Neal, 1973, „Uses and
capabilities of electronic capacitance instruments
for estimating standing herbage: Part 1. History
and development,“ /. Br. Grassl. Soc. 28:81 -89.
Pearson, R. L., Miller, L. D. and Tucker, C. J. 1976,
„Hand-held spectral radiometer to estimate
gromineous biomass “Applied Optics 15 (2): 416-
418.
Pechanec, J. F„ and Pickford, G. D. 1973, „A weight
estimation method for the determination ofrange
or pastureproduction,“Am. Soc. Agron.J. 29 : 894
- 904.
Rouse, J. W„ Haas, R. H„ Schell, J. A„ Deering, D.
W„ nnáHarlan, J. C. 1974, „Monitoring the ver-
nal advancement and retrogradation (green-
wave effect) of natural vegetation,“ NASA Type
III Final Report, GSFC. 347 pp.
Tucker, C. J„ 1977, „Asymptotic nature of grass
canopy spectral reflectance," Applied Optics 16 (5)
: 1151 - 1157.
Tucker, C. J. 1979. Red and photographic infrared
linear conbinations for monitoring vegetation.
Remote Sensing of Enwironment 8 (2) : 127 - 140.
Tucker, C. J. 1980. A spectral method for determin-
ing the percentage of green herbage material in
clipped samples. Remote Sersing of Enwironment (in
press).
Tucker, C. J„ Mille-, L. D. and Pearson, R. L. 1975,
Shortgrass prairie spectral measurements. Photo-
gram. Engr. andRemoteSensing 41 (9): 1157-1162.
Tucker, C. J„ Miller, L. D. and Pearson, R. L. 1973,
„Measurement of the combined effect of
chlorophyil, green biomass, and leaf water on
canopy spectral reflectance ofa shortgrass prairie
ecosystem,“ p. 601 - 627. In: Proceedings of the2nd
Annual Remote Sensing of Earth Resources Conference,
Univ. Tennessee Space Inst., Tullahoma.