690 
Acknowledgments: We would like to thank Dr Yuri Knyazikhin, Dr Alexander Marshak and Dr Ranga B. 
Myneni (who provided us with the fortran code of his Discrete Ordinates Method) for the time they spent 
teaching us the beauty of radiation transport equation. 
REFERENCES 
- Bunnik N. J. J., The multispectral reflectance of shortwave radiation by agricultural crops in relation with their 
morphological and optical properties', Pudox Publ., Wageningen, The Netherlands, 1978. 
- Knyazikhin Y., Marshak A. L„ Schilze D. and Myneni R. B., 'Optimization of solar radiation input in forest 
canopy as a tool for planting patters of trees', accepted in December 1992 into Trans. Theory and Stat. Phys. 
- Marshak A. L„ The effect of the hot spot on the transport equation in plant canopies', J. Q. S. R. T., vol 42, 
n° 6, 615-630, 1989. 
- Myneni R. B. and Asrar G., 'Radiative transfer in three-dimensional atmosphere-vegetation media', J. Q. S. R. 
T., vol 49, n° 6, 585-589, 1993. 
- Nilson T. & A. Kuusk, 'A reflectance model for the homogeneous plant canopy and its inversion', Remote 
Sens. Environ., 27, 157-167, 1989. 
- Pinty B„ Verstraete M. & R. E. Dickinson, 'A physical model for predicting bidirectional reflectance over bare 
soil’. Remote Sens. Environ. 273-287, 1989. 
- Ross J., 'The radiation regime and architecture of plant stands', The Hague-Boston-London, Dr W. Junk 
Publishers, pp 391, 1981. 
- Shultis J. K. & R. B. Myneni, 'Radiative transfer in vegetation canopies with anisotropic scattering', J. Quant. 
Spectrosc. Radiat. Transfer, Vol 95, № 39, 115-129, 1988. 
- Verstraete M., B. Pinty & R. E. Dickinson, 'A physical model of the bidirectional reflectance of vegetation 
canopies, 1, Theory’, Journal of Geophysical Research, 95, 755-765,1990.