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Carbon-Hydrogen-Oxygen-Nitrogen-Phosphorus-Potassium SOIL MACRONUTRIENTS Nutrients Macronutrients Needed in larger quantities Micronutrients Needed in smaller quantities Non-Fertilizer Nutrients Cannot be supplied in a fertilizer Come from Water & Air (H2O & CO2) Carbon Hydrogen Oxygen Primary Macronutrients Nitrogen Phosphorus Potassium Complete fertilizer must contain all 3 Secondary Macronutrients Calcium Magnesium Sulfur Nitrogen Encourages Growth Gives plants a dark green color Deficiency: - Plant turns lighter green -Yellowing leaves - Slow growth Phosphorus Root Development Encourages Flowering Improves Winter Hardiness Deficiency Purplish coloration to leaves Stunted Growth Potassium Increases disease resistance Thickens cell walls Aids in the transport of food in the phloem Deficiency Yellowing, death of tissue at the tips.