The earliest published work on growing terrestrial plants without soil was the 1627 book Sylva Sylvarum or 'A … See more

There are two main variations for each medium: sub-irrigation and top irrigation . For all techniques, most hydroponic reservoirs are now built of plastic, but other materials have been used, including concrete, glass, metal, vege… See more

Different media are appropriate for different growing techniques.
Rock wool (mineral wool) is the most widely used medium in hydroponics. Rock wool is an inert substrate suitable for both run-to-wast… See more

The formulation of hydroponic solutions is an application of plant nutrition, with nutrient deficiency symptoms mirroring those found in traditional soil based agriculture. However, the underlying chemistry of hydroponic … See more

With pest problems reduced and nutrients constantly fed to the roots, productivity in hydroponics is high; however, growers can further increase yield by manipulating a plant's environment by constructing sophisticated … See more