Books reviewed in this article:THE PHYSICAL CHEMISTRY AND MINERALOGY OF SOILS, VOLUME 2.C. E. MarshallPLANT DISEASE EPIDEMIOLOGY. Edited by P. R. Scott&A. BainbridgeFUNGI, MAN, AND HIS ENVIRONMENT. R. C. CookePHYSIOLOGY AND BIOCHEMISTRY OF SEEDS IN RELATION TO GERMINATION. J. D. Bewley&M. BlackAPPLIED AND FUNDAMENTAL ASPECTS OF PLANT CELL TISSUE AND ORGAN CULTURE. Edited by J. Reinert&Y. P. S. Bajaj, 1977