10 Questions
What are the characteristics of the best hydroponic substrate?
The best hydroponic substrate should have good porosity, water retention, neutral pH, high thermal inertia, be relatively clean and sustainable.
What is the problem with using sand as a hydroponic substrate?
Sand has a low porosity and aeration can be a problem.
What are the advantages of using perlite as a hydroponic substrate?
Perlite is sterile, chemically and physically stable, and can be reused after steam sterilization.
Why is vermiculite not a good choice as a hydroponic substrate?
Vermiculite is physically not very stable and cannot be steam sterilized.
What are the advantages of using rock wool as a hydroponic substrate?
Rock wool is light and inert.
Why is polystyrene not an environmentally-friendly choice as a hydroponic substrate?
Polystyrene pollutes the environment.
What are the advantages of using peat as a hydroponic substrate?
Peat has a high water holding capacity and CEC.
What are the advantages of using coir as a hydroponic substrate?
Coir has higher air-filled porosity than peat and better crop growth.
What are the advantages of using wood fiber as a hydroponic substrate?
Wood fiber has a very high level of air-filled porosity.
What is the disadvantage of using rock wool as a hydroponic substrate?
Rock wool is discarded after a couple of uses.
Study Notes
- Different types of substrates can be used in hydroponic systems.
- The best hydroponic substrate should have good porosity, water retention, neutral pH, high thermal inertia, be relatively clean and sustainable.
- Sand has a low porosity and aeration can be a problem.
- Perlite is sterile, chemically and physically stable, and can be reused after steam sterilization.
- Vermiculite is physically not very stable and cannot be steam sterilized.
- Rock wool is light and inert, but discarded after a couple of uses.
- Polystyrene is added to improve aeration and drainage but pollutes the environment.
- Peat has a high water holding capacity and CEC but low pH and nutrient content.
- Coir has higher air-filled porosity than peat and better crop growth.
- Wood fiber has a very high level of air-filled porosity but physical properties can change.
"Are you ready to become a hydroponic substrate expert? Test your knowledge on different types of hydroponic substrates, including their porosity, water retention, pH, thermal inertia, sustainability, and more. From sand to coir and wood fiber, this quiz will challenge your understanding of the best substrates for hydroponic systems. Get ready to grow your knowledge and become a hydroponic pro!"
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