Solution culture is being used for raising flowers and vegetables at home . This soilless production of plants is called hydroponics (Gk. hydor - water, ponas - excretion) Plans are raised in small tanks of concrete or metal, The tanks are covered over by wire netting or gauze. They are filled up with a water solution containing appropriate quantities of all mineral elements. The solution is changed from time to time. There is a meachnism for aeration and circulation . pH is checked and corrections are made regularly . Iron is added as Fe-EDTA otherwise it gets precipitated, especially in alkaline pH. The agent which keeps metals in the soluble state is called chelating agent or ligand. EDTA (Ethylene diamine tetra-acetic acid) is one such agent. Fe-EDTA complex is called chelate. As soon as the plant enlarge they are tied to the roof of the chambers by means of strings. Hydroponies is useful in area having thin, infertile and dry soils. They conserve water. Additionally hydroponics can regulate pH optimum for a particular crop, control soil borne pathogens, avoid problems of weeding and obtain consistently better yield.
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Assertion: The technique of growing plants in a nutrient solution is known as hydroponics Reason: Hydroponics is used for commercial production of vegetables such as tomato, seedless cucumber and lettuce.
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$ The phenomenon of soil-less culture of plants is called Hydroponics. ! Donnan equilibrium is due to fixed ions in the cells
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Assertion: In solution culture of plants, iron is added in the form of Fe-EDTA Reason: Hydroponics set-up is costly
Hydroponics I. is useful in areas having infertile and dry soils II. Can regulate pH optimum for a particular crop. III. Increases labour cost. IV. Increases problem of weeding.
