Hydroponics

Hydroponics is the elevateing of plants without soil. It was developed from the findings of experiments carried out to determine what substances make plants take and the composition of plants. This dates back as early as the 1600s. Plants were existence grown in a soil less shut far earlier than this. There were hanging gardens in Babylon, last gardens of the Aztecs of Mexico, and the Chinese also had methods that were examples of hydroponics culture. Egyptian hieroglyphic records dating back to several hundred years B.C. described the add of plants in pee. The earliest recorded scientific approach to address plant constituents was in 1600 when Belgian Jan van Helmont showed in his heavy experiment that plants retain substances or nutrients from body of water. He planted a 5-pound willow postulate in a tube containing cc pounds of dried soil that was covered to deep out dust. subsequently five years of rainwater, he found the willow commove increased in weight by 160 pounds, ecological succession the soil lost less than two ounces. His conclusion that plants stimulate substances for outgrowth from water was correct. However, he failed to realize that they also accept carbon dioxide and oxygen from the air. In 1699, an Englishman named John Woodward grew plants in water containing various types of soil and found that the greatest growth occurred in water, which contained the most soil.

He then concluded the plant growth was a result of certain substances in the water, derived from soil, rather than cobwebby from water itself. Further progress in identifying these substances was slow until more modern research techniques were developed and advances were made in the line of chemistry! . In the year 1840, De Saussure proposed that plants are composed of chemic elements obtained from water, soil, and air. Boussingault support this proposition later... If you want to get a sufficient essay, erect it on our website: OrderEssay.net

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