1. Bassman, J. H., Black, A. R. and Wang, X. Q. 1989. Effect of container type and watering regime on early growth of western larch seedlings. Tree Plant. Notes 40(3): 3?15.
2. Becker, M. and Levy, G. 1983. Effect of soil drying on mineral nutrition of young conifer plants. Ann. Sci. For. 40: 325?335. (In French with English summary.)
3. Day, R. J. 1980. Effective nursery irrigation depends on regulation of soil moisture and aeration. Proc. North Am. For. Tree Nursery Soils Workshop, July 28?August 1 1980, Syracuse, New York. pp. 52?71.
4. Esau, K. 1965. Plant anatomy. 2nd ed. John Wiley and Sons, New York, 767 pp.
5. Grossvon, K. 1976. Dependence of rates of net photosynthesis and transpiration of Picea abies seedlings on water potential of root medium and on air humidity with different CO2 concentrations. Forstwiss. Cbl. 95: 211?225. (In German with English summary.)