"A child astronaut takes an imaginary trip to Saturn, learns about the harsh conditions on the gas planet, and decides that Earth is a good home after all. Includes solar system diagram, Saturn vs. Earth fact chart, and glossary"--Provided by publisher.
Containing an extensive range of photographs and authored by leading horticultural experts,Diseases of Temperate Horticultural Plants is an indispensable reference work for horticultural professionals, academics, students, crop producers as well as amateur horticulturists. The diseases of major crops are presented according to their classification, and the symptoms of each disease, causal pathogen and control measures for each condition are described.
Boreal and temperate tree species are adapted to the seasonally varying climatic conditions with their annual cycle of development so that the frost hardy dormant phase and the susceptible growth phase are synchronized with the seasonality of the climate. The annual cycle includes various attributes such as timing of bud burst and other phenological events, and seasonality of photosynthetic capacity or frost hardiness of the trees. During the last few decades dynamic ecophysiological models have been used increasingly in studies of the annual cycle, especially when projecting the ecological effects of climate change. These studies are reviewed and some additional new ideas on the topic are also introduced. A unifying notation is used throughout the book when discussing different aspects of the annual cycle. Main emphasis is on combining modelling with experimental studies and on the importance of the biological realism of the models