Digital media 3 Vernalization 3 Photoperiodism 2 Plant physiology 2 The biological clock:rhythms of life 2 Acclimatization 1 Aesthetics Audiovisual 1 Agrisilvice theory 1 Arabidopsis thaliana 1 Arts 1 Audio Visual 1 Betula pendula 1 Biochemistry 1 Biotechnology 1 Cereals 1 Chilling 1 Cold 1 Cold resistance 1 Cold stress 1 Crop Ecology 1 Digital Media 1 Ecological pyramids 1 Environmental Tolerance of Plants 1 Field Crops, (New March 2000) 1 Films 1 Forests and Forest Trees (Biology and Ecology) 1 Frost 1 Frost resistance 1 Genes 1 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 1