1) " Hydroponics" -- As it applies to Hydroponics Kits Hydroponics is the growing of plants without soil. A variety of techniquesexist. Researchers of plantmetabolism have discovered that plants absorb nutrients as simple ions in water. Innatural conditions, soil acts as a nutrient reservoir but the soil itself is not essential to plant growth. When the nutrients in the soil dissolve in water, plant roots areable to absorb them. When the required nutrients are introduced into a plant's water supply artificially, soil is no longerrequired for the plant to thrive. Almost any plant will grow with Hydroponica , but some will do better than others. It is alsovery easy to do; the activity is often undertaken by very young children with such plants as watercress. Hydroponics is useful to us in two main ways. First, it provides a more controlled environment for plant growth than soilthereby removing many unknowns from experiments. Second, many plant species producemore product in less time and sometimes of higher quality, which under certain economic and environmental conditions, makeshydroponics growing more profitable to the farmer. With Hydrlponics there are no soil-borne diseases, weeds to pull, or soil totill, and plants can be placed incredibly close to one another. This allows a large amount of food to be produced in veryspace-constrained places. Hydroponisc is also very water efficient as it is practiced using containers or closed loop systemsthat recirculate the water and requires only a small fraction of the water used in traditional farming.The first researcher of Hydroponcis was John Woodward of England, who, in 1699, grew plants in water to which he had added various soils. This demonstrated that the earthcontained various substances which the plants needed besides water. In the mid- 19th century, the German plant physiologists Sachs and Knop grew plants in simple solutions of inorganicsalts. In 1929, Professor Gericke of the University of California, Davis...
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