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Understanding Soil Nutrients and Fertilizers for Plant Growth Optimization

Learn about essential nutrients plants acquire from soil, identify deficiency symptoms, and analyze fertilizer composition for optimal growth. Discover methods to determine soil fertility and maximize yields.

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Understanding Soil Nutrients and Fertilizers for Plant Growth Optimization

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  1. Soil Nutrients Modified by the GA Agricultural Education Curriculum Office July 2002

  2. Carbon Hydrogen Oxygen Nutrients Plants Acquire From Air And Water

  3. Nitrogen Phosphorous Potassium The Primary Nutrients

  4. Sulfur Calcium Magnesium The Secondary Nutrients

  5. Boron Chlorine Copper Iron Manganese Molybdenum Zinc The Micronutrients

  6. Boron Calcium Carbon Chlorine Copper Hydrogen Iron Magnesium The 16 Essential Nutrients • Manganese • Molybdenum • Nitrogen • Oxygen • Phosphorus • Potassium • Sulfur • Zinc

  7. Nitrogen (N): most important nutrient besides water; determines rate of growth • deficiency symptom: yellowing of leaves • Phosphorous (P): required during germination and fruit/seed formation • Deficiency symptoms: stunted growth; purple-colored leaves • Potassium (K): regulatory • Deficiency symptoms: stunted growth; mottled leaves Functions Of Primary Nutrients And Deficiency Symptoms

  8. Iodine Cobalt Silicon Non-essential Nutrients That Need To Be Considered

  9. To maximize yield To maximize profit To maintain soil fertility Why Is A Knowledge Of Soil Nutrients Necessary?

  10. You can use any of the following methods to determine soil fertility: • soil tests • managing organic matter • fertilizing Determining Soil Fertility

  11. The amount of the different nutrients found in a fertilizer. • It is always listed as a percent. • It is always listed Nitrogen-Phosphorous-Potassium (N-P-K). • For example, a fertilizer labeled 10-15-10 is 10% Nitrogen, 15% Phosphorous, and 10% Potassium. • If there is a fourth letter, it designates the nutrient sulfur. What Is Fertilizer Analysis?

  12. How many pounds of nitrogen are in a 50 pound bag of 10-15-10? • 10% of 50# = 5# Nitrogen Example Problem For Determining The Amount Of A Nutrient In A Fertilizer

  13. How many pounds of actual nutrients are in a 50 pound bag of 10-15-10? • 10+15+10 = 35% nutrients or 17.5 pounds • The other 65% of the bag is inert matter Example Problem For Determining The Amount Of Total Nutrients In A Fertilizer

  14. A hobby gardener buys a bag of "Scott's Turfbuilder" for $31.95. The bag weighs 62 pounds and has an analysis of 22-3-10. • How many pounds of actual nutrients does the bag contain? • 21.7 pounds of nutrients in one bag • (22+3+10)=35% • 35%*62=21.7 Another Analysis Problem

  15. What is the cost per pound of actual nutrients? • $1.47 • $31.95/21.7# nutrients=$1.47 Another Analysis Problem (cont.)

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