LXXXIII (83) 1999, No. 1
World Production of Phosphate Rock
Functions of Phosphorus in Plants
Yield and Economic Responses to Phosphorus
Phosphorus Interactions with Other Nutrients
Effects of Phosphorus on Crop Maturity
Important Factors Affecting Crop Response to Phosphorus
Annual Statement of Ownership
Phosphorus Deficiency Symptoms in Some Crops
Phosphorus and Water Use Efficiency
Phosphorus Nutrition Improves Plant Disease Resistance
Phosphorus Improves Crop Quality
Effects of Phosphorus on Nitrogen Fixation
Phosphorus in Animal Nutrition
Phosphorus Fertilizer Placement