Describe a hydroponic greenhouse

What will be an ideal response?


In a hydroponic greenhouse it is not necessary for plants to be planted in soil. Water flow is
maintained so that the dissolved oxygen levels in the nutrient solution are optimal for plant growth.

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?The measure of the ability of a material to support combustion is called ____. 

A. ?self-extinguishment B. ?flammability C. ?melt index D. ?ablative index

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The ability to find good prices on parts is an important part of a jobber's business.

Answer the following statement true (T) or false (F)

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Most tree farms are located in the North

Indicate whether the statement is true or false

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Passing an electric current through metal is referred to as:

A. fusion welding B. resistance welding C. brazing D. flow welding

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