Assertion :In solution culture of plants, iron is added in the from of $F{e}^{-}$ EDTA.
Reason :Hydroponics set-up is costly.

EDTA (Ethylenediaminetetraacetic acid) is a common metal chelator and binds ions like iron and calcium. It is commonly used in foliar spray of iron on plants to increase iron supply and / or get over iron deficiency. Hydroponics is art of growing plants without soil in a nutrient medium. Hydroponics is a costly set up, because exact mineral requirement of the plant needs to be worked out and provisions need to be made.