Plant genetic resources Plant Breeding and Genetics 13 Biological Resources (Plant) 12 Field Crops, (New March 2000) 6 Conservation 5 Crops 5 Plant breeding 5 Biotechnology (General), (Revised June 2002) 4 Horticultural Crops, (New March 2000) 4 Plant Production 4 Agricultural Economics 3 Biodiversity 3 Biotechnology 3 Crop production 3 Food security 3 Genetic diversity 3 International Trade 3 Plant Physiology and Biochemistry 3 Wild relatives 3 Agricultural economics 2 Botany 2 Cassava 2 Characterization 2 Crop Produce 2 Cropping systems 2 Cultivars 2 Domestication 2 Food Economics, (New March 2000) 2 Food supply 2 Gene banks, Plant 2