The EC of a nutrient solution can significantly affect plant growth and development
True
The substrate or medium culture hydroponic method has a solid medium for the roots and is named based on the type of medium used
True
Rockwool is not a commonly used support for hydroponically growing plants
False
Hydroponics in new technology
False
Growing plants hydroponically is not bad for the environment; it is actually environmentally friendly
True
Hydroponics must be used indoors
False
Growing plants hydroponically does not require the use of pesticides
False
There are many other reports in the literature describing hydroponic formulas, most of which are identified as "modified ________ nutrient solutions
Hoagland
Which of the following is used for growing plants hydroponically? Aeroponics, Nutrient film, Bag culture using saw dust
all of the above
What are four factors in the root zone that affect hydroponically grown plants?
pH, Temperature, Electrical Conductivity (EC), Oxygenation
What are the two main types of hydroponic systems used to grow plants?
Solution and Substrate
What are three types of solution cultures commonly used today?
Static, Nutrient film technique, Aeroponics
Provide three commonly used solid support media used for the substrate hydroponic culture method?
Rockwool, perlite, sawdust
What is the main advantage of the nutrient film technique for hydroponically growing plants?
Plant roots exposed to adequate supplies of water, oxygen and nutrients
concluded that water was essential for plant growth by providing hydrogen and that carbon and oxygen came from the air; he also stated that plants contain nitrogen and other materials
Boussingault
showed in the classical experiment that plants obtain substances from water required for growth
van Helmont
first to use the word 'hydroponics
gericke
proposed that plants are composed of chemical elements obtained from water, soil, and air
de Saussure
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