Hydroponics
Plant and Soil Science
Plant Science Technology
Lesson 3
Aggregate Culture
• material such as
sand, gravel, or
marbles support the
plant roots.
Water culture, solution culture, or
nutriculture
• plant roots are
immersed in water
containing dissolved
nutrients.
Aeroponics
• plant roots hang in
the air and are misted
regularly with a
nutrient solution
Continuous-flow system
• nutrient solution flows
constantly over the
plant roots.
Hydroponics is growing in importance as a
means of producing vegetables and other
high-income plants
Plant Growth Requirements
• Water
• Oxygen
• Mineral Nutrients
– Needed in large quantities
• nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.
– Needed in tiny amounts
• iron, manganese, boron, zinc, copper, molybdenum, and chlorine.
• Light
– Need 8 – 10 hours to produce well
• Spacing
• Temperature
• Support