General subjects. Mouvement of nutrients in the plant. History of plant analysis. Plant nutrition. Inherent causes of variation in plant composition with special reference to leaves. Environmental effects on plant composition. The purpose of plant analysis. Sampling principles and procedures. Reference methods of analysis. Interpretation of plan analysis. The present and the future. Tree and shrub crops. Vines. Apples. Pears. Peaches. Apricots and plums. Cherries. Olives. Citrus. Mango. Avocado. Oil palm. Coconut. Date palm. Coffee. Cacao. Miscellaneous tropical fruits. Rubber. Temperate forest species. Tropical forest species. Miscellaneous crops. Greundnut. Cotton. Sugar cane. Rice. Maize. Sorghum. Wheat and barley. Soya bean. Pineapple. Passion fruit. Papaya. Banana. Carnation. Tomato and cucumber. Strawberry. Tropical fodder crops.