Íslenskar landbúnaðarrannsóknir - 01.03.1980, Side 27

Íslenskar landbúnaðarrannsóknir - 01.03.1980, Side 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.

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