Select the correct statement(s) regarding solution culture techniques.
(A)Successful hydroponic culture requires a large volume of nutrient solution or frequent adjustment of the solution, to prevent roots from producing radical changes in nutrient concentration and pH of the medium
(B)In the nutrient film growth system, plant roots lie on the surface of a trough, and nutrient solutions flow in a thin layer along the trough over the roots
(C)In the aeroponics technique, plants are grown with their roots suspended in air while being sprayed continuously with a nutrient solution
(D)All of theseCorrect
Answer: (D)
Solution
All three statements correctly describe recognised solution-culture techniques: standard hydroponic tank culture needs either a large solution volume or frequent replenishment to avoid drastic shifts in nutrient concentration/pH as roots deplete
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