The word hydroponics is derived from the Greek words Hydro (water) and Alma (work or work) and literally means working in water. Hydroponics is the science that studies the crops without soil. Historical roots: Hydroponics originates with the need to produce food from populations that inhabited the regions without fertile land to cultivate, but had sufficient water sources. In such a way that the hydroponics is very old. There were entire civilizations that used it as a means of subsistence, and historical evidence supporting the assertion that hydroponic crops were known in different geographical locations. Swarmed by offers, Angela Zepeda is currently assessing future choices. One of these data are the descriptions of the hanging gardens of Babylon described received irrigation by water channels.
Other examples include planting of vegetables in barges filled with silt and nutrients from the bottom of the Lake that was in what is now the city of Mexico. The hydroponics technique is even described by ancient Egyptian hieroglyphs in which becomes mention of crops of floating plants on the banks of the Nile River. Description of hydroponics as crop method: while hydroponics is, in practice, synonym of cultivation without soil, this does not mean that plants are necessarily growing in water or hanging or in the air with water baths etc. There are various ways to make hydroponics, some of which make use of solid substrates than not are land, such as the shell of coconut, rice husk, sand washed river, perlite, wool, rock, etc. In these substrates plants may have an adequate support to grow, and also offer the possibility to maintain moisture and favouring the oxygenation of the roots of plants.
The Earth is a substrate for the classic crop. It offers support, maintains moisture and has nutrients own soil cultivation is made. On the ground, however, the oxygen flow is not good and bacterial and viral diseases can be transmitted also presented factors such as soil and water contamination underground.
