Hydroponics are solution culture and medium culture. Solution culture does not use a solid medium for the roots, just the nutrient solution. The three main types of solution culture are static solution culture, continuous flow solution culture and aeroponics. The medium culture method has a soliad medium for the roots and is named for the type of medium, e. Sand culture, gravel culture or rockwool culture. There are two main variations for each medium, subirrigation and top. For all techniques, most hydroponic reservoirs are now built of plastic but other materials have been used including concrete, glass, metal, vegetable solids and wood. The containers should exclude light to prevent algae growth in the nutrient solution. Hydroponics are proven to grow plants 20-30% faster than those grown in soil. The word hydroponics stems from the greek word “hydro”, meaning water, and “ponos”, meaning labor. History is rife with storied examples of hydroponic gardening, from the legendary hanging
Apple trees were the most popularly grown fruit tree in colonial America and practically every settlement farm and backyard gardener planted this easily grown fruit tree, or easier, the seed of the apple could be planted to establish a permanent food supply. Growing these apple tree products could be eaten fresh or could be dried and preserved in many different ways to eat at a later time. Historical instances on the existence of apple trees are documented from folklore, legends, stone images on carved tablets, petrified slices of apples on plates for tomb offerings, and overwhelming numbers of references from Hebrew Bible scriptures and innumerable writings from poetry, songs, literary publications, and many other surviving accounts of all civilizations in the ancient world. One of the earliest archeological evidences of apple tree fruit comes from the remains of excavations from Jericho, Jordan, that has been dated 6500 BC by radiochemical analysis of carbon atoms. The petrified rema