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Understanding Properties of Growing Media

Understanding Properties of Growing Media. Lesson 1. Vermiculite>>>>>. Next Generation Science/Common Core Standards Addressed!.

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Understanding Properties of Growing Media

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  1. Understanding Properties of Growing Media Lesson 1 Vermiculite>>>>>

  2. Next Generation Science/Common Core Standards Addressed! • HS‐LS2‐3. Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions. [Clarification Statement: Emphasis is on conceptual understanding of the role of aerobic and anaerobic respiration in different environments.] [Assessment Boundary: Assessment does not include the specific chemical processes of either aerobic or anaerobic respiration.] • WHST.9‐12.9 Draw evidence from informational texts to support analysis, reflection, and research. (HS‐LS1‐1) • HSSIC.A.1Understand statistics as a process for making inferences about population parameters based on a random sample from that population. (HS‐LS2‐6)

  3. Agriculture, Food, and Natural Resource Standards Addressed • PS.03.02.02.a. List and summarize the reasons for preparing growing media before planting. • PS.01.02.01.a. Identify the major components of growing media and describe how growing media support plant growth.

  4. TERMS • Aeration – the presence of air • Growing medium – material used for plant growth • Hydroponics – growing plants w/o “soil” • Leach – to remove by percolation • Pore spaces – voids for water or air holding • Soil – outer layer of the earth suitable for plants • Soilless medium – sterile product/s used for plants

  5. Bell Work! • 1. Identify the types of growing media. • 2. Describe the functions of growing media. • 3. Explain the relationship between growing media and plant growth. • 4. Why is a good growing media made up of a variety of components?

  6. Interest ApproachWhat makes a great basketball team? • 5 or more members that work well together. • At least 1 who can score points from 20’ +. • At least 1 who can be used inside the key. • 1 or more who can control the ball. • 1 or more to push the ball inside. • Each player has their strengths!

  7. Interest ApproachWhat makes a great growing medium? • Several components that work well together • 1 or more that hold water. • 1 or more that hold air. • 1 or more sources of nutrients. • 1 or more to help defend against pest. • Components that are sterilized.

  8. Interest ApproachWhich Makes the Best Growing Medium? • Sand • Peat Moss • Field Soil • Vermiculite • Pearlite • Water • Gravel or a mixture!

  9. What are the types of growing media used in floriculture production? • Is “soil” used? • Soil – the earth’s outer crust is full of life! • Bacteria • Fungi • Invertebrates

  10. What are the negatives of using “SOIL” for containers? • Unknown history of: • Pesticides • pH • Fertility level • High shrink / swell • Soil shrinks as it dries – forming cracks • Higher disease probability

  11. So what media should you use? • Sand? Dries to quickly. • Peat moss? Dries to slowly. • Choir? Hard to get wetted. • Water? To little air. • Pearlite? To much air. • Vermiculite? Pricey. • Potting soil mixes? Just right.

  12. The 3 basic types of media! • Soil – natural layer of the earth that supports life. • Soilless – any material for growing plants not containing topsoil. • Hydroponics – plants grown primarily in nutrient solution.

  13. What are the functions of the growing media? • Must provide AIR. • Must provide WATER. • Must provide Nutrients. • Must provide ANCHORE / SUPPORT.

  14. What effect does growing media have on plant growth? • Supplying Nutrients • Some media cannot hold essential elements for plants. Nutrients are leached out to rapidly. • Stressed plants are prone to disease and insect damage – increasing loss. • Reduced growth = lower returns

  15. What effect does growing media have on plant growth? • Supplying Air • As air is reduced, plant stress increases. • Roots need oxygen and water – both in moderation. • Increasing stress increases pest susceptibility and profit loss

  16. Necrotic line patterns in the foliage of a cyclamen affected by impatiens necrotic spot tospovirus (INSV).

  17. What effect does growing media have on plant growth? • Uniformity • Large scale production demands that all plants perform equally. • This is only possible if all plants get equal inputs from a uniform media.

  18. Review

  19. What are the 3 types of media? • Soil • define • Soilless • define • Hydroponics • define

  20. What are the functions of growing media? • Supply Air. • Why? • Supply water. • Why? • Supply nutrients. • Why? • Supply support / anchor. • Why?

  21. Why is it important for media to: • Supply nutrients? • Increase healthy plants,growth and returns. • Supply air? • Reduce diseases and increase profit. • Supply uniformity? • Plant schedules require uniform plant growth!

  22. The End! • Peat Bog!

  23. The End! • Mud Bog!

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