FFA Floriculture Practice Test

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Study for the FFA Floriculture Test. Access flashcards and multiple-choice questions for thorough preparation. Each question includes hints and explanations. Prepare to excel in your exam!

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Which substrate component used in greenhouses is derived from volcanic rock?

Coconut coir
Perlite
Sphagnum moss
Peat moss

The correct answer is: Perlite

Perlite is the correct answer because it is a naturally occurring mineral formed from volcanic glass that has been heated to the point of expansion. This process transforms it into a lightweight, porous material ideal for use in greenhouses and horticulture. Its structure allows for excellent aeration and drainage in growing substrates, promoting healthy root development and preventing overwatering. Coconut coir, derived from the fibrous husk of coconuts, is used primarily for moisture retention and sustainability. Sphagnum moss, sourced from wetlands, is valued for its water-holding capacity and as an organic growing medium. Peat moss is harvested from partially decomposed plant materials in swampy areas and is known for its excellent water retention and nutrient-holding properties. While all these components are important in horticulture, they are not derived from volcanic rock as perlite is.