Abstract: | Books reviewed in this article: NITROGEN AS AN ECOLOGICAL FACTOR. Edited by J. A. L ee , S. McN eill & I. H. R orison BIOLOGY OF NONVASCULAR PLANTS. By H. N. P ritchard & P. T. B radt GENETIC ASPECTS OF PLANT NUTRITION (Development in Plants and Soil Sciences, Volume 8). Edited by M. R. S aric & B. C. L oughman PHYSIOLOGICAL PLANT ECOLOGY III. Edited by O. L. L ange , P. S. N obel , C. B. O smond & H. Z iegler |