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How Peanuts Are Planted And Harvested Peanuts
are planted and harvested with specialized machinery. Peanut seeds are planted
about two inches deep, one every three or four inches, in rows about three feet
apart. The seeds do best in sandy soil, especially soil rich in calcium. When
the soil temperature is warm (65-70 F.) given enough water the seeds will sprout.
In about two weeks, the first "square" of four leaflets will unfold above the
peanut field. Thirty to forty days after emergence the plants bloom, "pegs"
form and enter the soil. The peanut shells and kernels develop and mature during
the next 60 to 70 day period. Depending on the variety, 120 to 160 frost free
days are required for a good crop. When the plant has matured and the raw peanuts are ready to be harvested, the farmer waits until the soil is neither too wet or too dry before digging. When conditions are right, the farmer drives his digger up and down the green rows of peanuts plants. The digger has long blades that run four to six inches under the ground. It loosens the plant and cuts the tap root. Just behind the blade, a shaker lifts the plant from the soil, gently shakes the dirt from the peanuts, rotates the plant, and lays the plant back down in a "windrow," peanuts up and leaves down. When dug, peanuts contain 25 to 50% moisture, which must be dried to 10% or less for storage. Peanuts are generally left in the windrows to dry for 2 or more days in the field, then threshed or combined. The farmer drives his combine over the windrows. The combine lifts the plants, separates the peanuts from the vine, blows them into a hopper on the top of the machine, and lays the vine back down in the field. The peanuts are then dumped into wagons and cured to 10% moisture with warm air forced up through the floors of the wagons. The peanuts are then taken to be sold at nearby peanut buying stations. Return to top Peanut Grading, Shelling and Blanching At the shelling company buying station, peanuts are sampled and graded by the Federal-State Inspection Service to determine their value. The inspectors establish the meat content, size of pods, kernel size, moisture content, damaged kernels and foreign material. The results of the inspection determine the overall quality and value of each load. After the peanuts are purchased by the sheller, they are placed in dry storage for eventual sale to processors and manufacturers. At the shelling plant, peanuts are taken from storage and cleaned; dirt, rocks, bits of vines and other debris are removed. If they are to be sold in their shells, the peanuts may also pass through a machine that cuts off any remaining stems on the shells. (About 10% of the peanut crop is sold as in-shell peanuts - usually the Virginia and Valencia types.) To sort for size, the peanuts travel over sizing screens that permit the smaller pods to fall through. Peanuts to be shelled are placed in slotted drums containing screens of different sizes. Rotating peanuts rub against each other until the shells are opened and the kernels fall out. The kernels are sized on screens that permit the smaller kernels to fall through. The shelled peanuts are cleaned again to remove foreign materials. This is done with density separators, electronic color sorters and by visual inspection to ensure that only the best peanuts reach the market. The peanut kernels are then sized, graded and bagged for market. From the sheller, peanuts are cleaned again and "blanched" before they are used in most peanut foods. Blanching is simply the removal of the reddish skin covering the kernels. In whole-nut or split-nut dry blanching, the kernels travel through warm air for a period of time to loosen the skins. Then the kernels go through a blanching machine where large rollers rub the surfaces of the kernels until the skins fall off. These kernels are checked with electronic color sorters to ensure that blanching is complete. Return to top How Peanuts are Marketed Peanuts are sold in various ways. A peanut broker or a sheller may sell the peanuts to the end user - or, a peanut dealer or commission merchant in a large market may buy the peanuts. Peanuts are usually sold to a manufacturer or "end user," who then converts the peanuts to consumer products and markets the peanuts to the public. Roughly three-quarters of the peanuts grown in the U. S. are used domestically, predominantly as edible products. About one-forth of all U.S. grown peanuts are exported to other countries. Exported peanuts are usually shipped raw, both shelled and in the shell. The major buyers of U. S. peanuts are found in Western Europe, Canada and Japan. Return to top Peanut Butter/Peanut Spread About one-half of all edible peanuts produced in the United States are used to make peanut butter and peanut spreads. By law and industry standard, any product labeled "peanut butter" in the U. S. must be at least 90% peanuts. The remaining 10% may be salt, sweetener and an emulsifier (hardened vegetable oil which prevents the peanut oil from separating and rising to the top). Other similar products which don't subscribe to the 90%/10% rule are labeled peanut spread. Many are reduced fat products with added vitamins and minerals. These standards are subscribed to by the industry to assure consumers of uniformly nutritious products. The ancient South American Indians were the first to make and eat peanut butter, and one of the peanut foods invented by Dr. George Washington Carver was similar to peanut butter. Historical reference has it, however, that peanut butter was invented by a physician in St. Louis about 1890 as a health food for the elderly. No one remembers the physician's name, although records show that in 1903 Ambrose W. Straub of St. Louis patented a machine to make peanut butter. Also during that period (1895), Dr. John Harvey Kellogg (of breakfast cereal fame) patented the process of making peanut butter for the patients at his Battle Creek Sanitarium, a health food retreat in Michigan. Basically, all peanut butter is made by a similar process. First the shelled, raw peanuts are roasted and cooled, then the skins are removed (blanched.) Some manufacturers split the kernels and remove the heart of the peanut as well. The hearts can be saved to make peanut oil and the skins left over from blanching can be sold for animal feed. The blanched peanut kernels are electronically sorted or hand picked one last time to be sure only good, wholesome kernels are used in peanut butter. The peanuts are ground, usually through two grinding stages, to produce a smooth, even-textured butter. The peanuts are heated during the grinding to about 170 degrees F . Once the emulsifiers are added and mixed, the butter is cooled rapidly to 120 degrees F or below. This crystallizes the emulsifiers, thus trapping the peanut oil that was released by the grinding. To make chunky peanut butter, peanut granules are added to the creamy peanut butter. The peanut butter is then packed into containers for sale at stores. Return to top Roasted Peanuts/Snack Peanuts To be roasted in the shell, peanuts are cooked at medium heat for about 15 minutes. They may be plain roasted peanuts or seasoned roasted-in-the-shell. The most popular are salted in-the-shell, however the new flavors - cajun and jalapeno are getting accolades from consumers as well. To season peanuts in the shell - prior to roasting- the peanuts are washed and then the seasonings, which are dissolved in water, are forced through the shells by a pressure process. When dried during roasting, the seasonings remain inside the shells. Most often, snack peanuts are shelled, roasted, blanched and salted, (although Spanish peanuts are usually roasted with their skins on.) Peanuts may be roasted in oil or by a dry-roasting process. Peanuts are oil-roasted in continuous cookers that take a steady stream of peanuts through hot oil for about five minutes. After draining, the kernels are salted evenly. Dry-roasted peanuts are cooked in a large oven by dry, hot forced air after which spicy seasonings are applied. The roasted peanuts are then packed in containers ranging in size from bags holding a handful, to large cans and jars. Frequently, peanuts are mixed with other nuts and dried fruits for "health-food" snacks. Return to top Peanut Confections Peanuts are used in candy-making in a seemingly infinite number of ways. A large variety of candy bars combine peanuts (whole, chopped or as butter) with such treats as chocolate, nougat, marshmallow, caramel, other nuts and dried fruits. Peanut brittle and chocolate-covered peanuts are always popular. The high protein content of peanuts make them ideal for high energy snacks. Six of the top ten candy bars sold in the U.S. contain peanuts and/or peanut butter. Return to top Oil and Other Peanut Products Applying pressure to peanuts squeezes out their oil. This oil is excellent for cooking because it is tasteless and can be heated to very high temperatures before it smokes. (450 degrees F, which is hotter than most other cooking oils). With hotter cooking temperatures, food will cook faster and absorb less oil. Peanut oil does not absorb or transfer flavors, so the same oil may be used repeatedly to cook different foods. Specially processed, defatted peanuts are available as roasted snack peanuts; they may be ground into a flour, which can be used to make such foods as high protein drinks and snacks. Or, the defatted nuts may be granulated and added to breakfast or diet bars to raise their protein level. Partially defatted peanuts can also be flavored to taste and to look (when chopped) like other nuts, such as pecans, almonds and walnuts for use in cooking. Peanuts can be made into imitation milk, cheese and ice cream. In fact, "cheese"" made from peanut milk is nutritionally superior to dairy products in everything except calcium. Peanut meal (made from the by-product of peanuts pressed for oil) is an important high protein animal feed. Return to top Non-Food Uses for Peanuts The shells, skins and kernels of peanuts may be used to make a vast variety of non-food products. For example, the shells may be used in wallboard, fireplace logs, fiber roughage for livestock feed and kitty litter; and, the skins may be used for paper making. Peanuts are often used as an ingredient in other products such as detergent, salves, metal polish, bleach, ink, axle grease, shaving cream, face creams, soap, linoleum, rubber, cosmetics, paint, explosives, shampoo, and medicine. Return to top How You Can Grow A Peanut Plant
"GROWING PEANUTS IN THE GARDEN"
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