<P> Hydroponics is a subset of hydroculture , the method of growing plants without soil , using mineral nutrient solutions in a water solvent . Terrestrial plants may be grown with only their roots exposed to the mineral solution , or the roots may be supported by an inert medium , such as perlite or gravel . The nutrients in hydroponics can come from an array of different sources ; these can include but are not limited to byproduct from fish waste , duck manure , or normal nutrients . </P>
<P> Hydroponics is a subset of hydroculture , the method of growing plants without soil , using mineral nutrient solutions in a water solvent . Terrestrial plants may be grown with only their roots exposed to the mineral solution , or the roots may be supported by an inert medium , such as perlite or gravel . The nutrients in hydroponics can come from an array of different sources ; these can include but are not limited to byproduct from fish waste , duck manure , or normal nutrients . </P>
hydroponics is a technique in which plants are grown in
hydroponics is a technique in which plants are grown in
mineral nutrient solutions in a water solvent
mineral nutrient solutions in a water solvent