Hydroponics is a simple technique that involves growing plants in water rather than soil. Hydroculture is a subset of it. Water is dissolved in mineral nutrient solutions. Only the roots of terrestrial plants are exposed to the nutritious liquid, or the roots are physically supported by an inert media such as perlite or gravel. Julius von Sachs and Wilhelm Knop developed the first standard recipe for plant-growing fertiliser solutions dissolved in water. This is where the term “nutriculture” came from. It is now known as Water Culture. The roots of the plants were completely immersed in a water solution containing nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), sulphur (S), and calcium (Ca) minerals (Ca). They are now known as macronutrients or macroelements (elements required in relatively large amounts).
What are hydroponics?
