This summary of what is known about microclimatic environments and the eff ects of climate on plant growth presents a comprehensive statement on the complex relationship between climate and agriculture. Th e author covers the theory and data of modern physical geography, meteorology, and agronomy within the context of contemporary ecological analysis to produce a book invaluable not only to the student and research worker but also one that deals for the fi rst time with the application of theory to real problems of energy budgets and water balance for the practical agronomist.