Nutrient deficiencies Plant Nutrition 4 Plant nutrition 4 Crop production 3 Nutrient uptake 3 Phosphorus 3 Plant Production 3 Soil Fertility 3 Fertilizers and other Amendments 2 Human diseases 2 Infectious diseases 2 Iron 2 Man 2 Nitrogen 2 Nitrogen fertilizers 2 Nutrient availability 2 Nutrition 2 Nutrition related Disorders and Therapeutic Nutrition 2 Plant Disorders and Injuries (Not caused directly by Organisms) 2 Plant Pests, (New March 2000) 2 Plant pests 2 Prion, Viral, Bacterial and Fungal Pathogens of Humans, (New March 2000) 2 Protozoan, Helminth and Arthropod Parasites of Humans, (New March 2000) 2 Soil Chemistry and Mineralogy 2 Soil fertility 2 Soil organic matter 2 Techniques and Methodology 2 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 2 Zinc 2 Access 1