Climate and soil Botany and improvement 1 Citriculture 1 Citrus root stocks 1 Cropping systems 1 Fruit drop in citrus 1 Interculture 1 Land preparation and planting 1 Leafy and salad vegetables 1 Nutrient management 1 Nutrition 1 Organic farming 1 Origin and history 1 Planting season 1 Production technology 1 Root crops 1 Seed production 1