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Soilless Growing Media

Soilless Growing Media. By: Johnny M. Jessup Agriculture Teacher/FFA Advisor. Soils & Growing Media. Made up of two types of materials…. Organic Matter Inorganic Compounds. Organic Matter. Dead plant or animal tissue. Contains carbon. Usually has diseases or insects.

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Soilless Growing Media

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  1. Soilless Growing Media By: Johnny M. Jessup Agriculture Teacher/FFA Advisor

  2. Soils & Growing Media • Made up of two types of materials…. • Organic Matter • Inorganic Compounds

  3. Organic Matter • Dead plant or animal tissue. • Contains carbon. • Usually has diseases or insects.

  4. Types of Organic Matter • Compost • Mixture of partially decayed organic matter.

  5. Types of Organic Matter • Bark • Particles too large to use in seed germination media.

  6. Types of Organic Matter • Mulch • Material placed on soil to break the fall of raindrops (prevents erosion), prevent weeds from growing, or improve the appearance of the area. • Used to cover soil to help hold moisture and prevent weeds.

  7. Mulch

  8. Types of Organic Matter • Straw

  9. Types of Organic Matter • Peat Moss • Type of organic matter made from sphagnum moss.

  10. Types of Organic Matter • Sphagnum • Pale & ashy mosses used to condition soil.

  11. Types of Organic Matter • Sawdust & Wood Shavings • High carbon to nitrogen ratio that makes nitrogen unavailable for plant use.

  12. Inorganic Compounds • Do not contain carbon • Usually sterile.

  13. Types of Inorganic Compounds • Soilless Media • Artificial soil. • Perlite • Natural volcanic material. • Helps aeration. • Improves water-holding capacity.

  14. Perlite

  15. Vermiculite • Vermiculite • Mica mineral matter used to start seeds and cuttings. • Helps hold moisture. • Has neutral pH.

  16. pH • Most organic matter is acid. • Most artificial media is neutral.

  17. Hydroponics

  18. Hydroponics • The process of growing plants without soil.

  19. Types of Systems • Aggregate System • Using sand or gravel to support plant roots.

  20. Types of Systems • Water Culture • Also called solution culture or nutriculture. • Plant roots grow in water containing dissolved nutrients.

  21. Types of Systems • Aeroponics • Plant roots hang in air and are misted regularly with a nutrient solution.

  22. Types of Systems • Continuous Flow System • Nutrient solution flows constantly over plant roots. • Most commonly used for commercial production.

  23. Advantage of Hydroponics • No soil & problems associated with soil. • Easy to control nutrient content of plants.

  24. Disadvantages of Hydroponics • Plant support must be provided with strings, wires, or stakes. • Water quality must be high. • Diseases spread through water. • More moisture or humidity in air to cause favorable environment for disease organisms. • More expensive.

  25. Hydroponic Lettuce

  26. Designed By: • Johnny M. Jessup; FFA Advisor • Hobbton High School

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