Foreign Study
According to Vynaise`s blog ,Mulching is a process that prevents loss of moisture on the plants, suppresses weed growth, reduces fertilizer leaching, cools the soil and keeps the vegetables off the ground. Mulching is really helpful for gardeners because it reduces watering by about 60 percent, it also keeps the soil from drying out, prevents weed seed germination that competes with the plants' nutrients and minerals.
Basically, there are two types of mulches, first is the organic mulch and second is the inorganic mulch. It uses straw or dried leaves, pebbles and or gravels respectively. Then these materials are then spread to the soil. Mulching serves as a barrier between the root of the plant and from the soil. In addition to this, soil loss from heavy rainfall is decreased due to mulching.
Pomelo is a native fruit to southeast Asia, grows wildly on the riverbanks in Fiji, Tonga and Hawaii. It may have been introduced to China around 100 B.C. It is widely cultivated in southern China, Thailand, also in Taiwan and southernmost Japan. The pulp color ranges between clear pale yellow to pink to red , tastes sweet, mild grapefruit especially when it is already ripe. It has very litle or none of the common grapefruits bitterness but the membranes of the segments are bitter and usually discarded. It is the thickest and largest citrus fruit; growing as large as 30cm in diameter and weighing as much as 10kg; the peelings are thick and is sometimes used as to make marmalade. One way to eat pomelo is to remove its rind, then peel the segments themselves to obtain the juice vesicles of its flesh.
The peel of the pomelo is alsi used in chinese cooking. In general, citrus peel is seldom used in chinese cuisine for flavoring, especially for sweet soup desserts.

Foreign Literature
According to the world food history,it says that the origin of the pomelo was almost certainly in the region of Malaysia and Indonesia. The pomelo also grew wild in part of China. It has been gathered and cultivated by the Chinese for thousands of years.
In Yu Kung manuscript it was said that the larger pomelo was among the tributes ‘wrapped in an embroidered silk scarf at the bottom of a basket’ offered to the Emperor Tayun who reigned from 2205 to 2197 BC.
The pomelo was the ancestors of the grapefruit. The word pomelo is related to the Dutchpampelmoose, and the French pamplemousse (grapefruit), and the French pomme(apple).
The orange and pomelo both took the Silk Road and the path trodden by Chinese medicine to Europe through the East, each going at its own pace.
In the mid-17th century the pomelo was introduced to the W. Indies, where citrus cultivation was already well established.
The pomelo spread to other Caribbean islands, and in 1707 British traveller Hans Sloane remarked that pomelos from Barbados tasted better than those from Jamaica.
In the brief summary of encyclopedia of life it says that citrus maxima, the pomelo (also called pummelo or shaddock) in the Rutaceae. It is a medium-sized tree but the largest of all Citrus species, with large leaves, flowers, and fruits. The species is native to southern China and Malaysia (and possibly other parts of southeast Asia), and is now cultivated in many tropical and semi-tropical countries for its large fruits. This species was a progenitor of the grapefruit and the tangelo among other modern citrus hybrids.
The C. maxima tree, which is the most cold-intolerant citrus species, has a rounded crown and grows 5 to 15 m. tall. The tree has large evergreen oblong to elliptic leaves, 10.5 to 20 cm. long, with winged petioles. The flowers and fruits are borne singly, in contrast to grapefruits, in which they grown in clusters of 2 to 20. The fruits, which vary from round to pear-shaped and ripen to yellow, orange, or red, are large--30 cm or more in diameter, and weighing up to 9 kg. The flesh of the fruit, which may be greenish yellow, yellow, pink, or red, is often juicy, and divided into 11 to 18 segments.
Like other citrus fruits, pomelos are high in vitamin C. They are generally eaten as a fresh fruit, and they store well. They have long been popular in Asia, especially China, Indonesia, and Thailand, but are increasingly found in specialty markets in the U.S. as well. The juice is also used in various beverages and the peel may be candied. Traditional medicinal uses of the fruit include treatment of coughs, fevers, and gastrointestinal disorders. The aromatic flowers are picked and processed into perfume in Vietnam, and the wood, which is heavy and hard-grained, used for making tool handles.
It says that in the brief history of pomelo by Julia F Morton from Miami, The pummelo is native to southeastern Asia and all of Malaysia; grows wild on river banks in the Fiji and Friendly Islands. It may have been introduced into China around 100 B.C. It is much cultivated in southern China (Kwang-tung, Kwangsi and Fukien Provinces) and especially in southern Thailand on the banks to the Tha Chine River; also in Taiwan and southernmost Japan, southern India, Malaya, Indonesia, New Guinea and Tahiti. The first seeds are believed to have been brought to the New World late in the 17th Century by a Captain Shaddock who stopped at Barbados on his way to England. By 1696, the fruit was being cultivated in Barbados and Jamaica. Dr. David Fairchild was enthusiastic about the first pummelo he tasted, aboard ship between Batavia and Singapore in 1899. In 1902, the United States Department of Agriculture obtained several plants from Thailand (S.P.I. Nos. 9017, 9018, 9019). Only one (No. 9017) survived and was planted in the agricultural greenhouse in Washington, and budwood from it was sent to Florida, California, Puerto Rico, Cuba (the Isle of Pines), and Trinidad. When the trees fruited, the flavor and general quality were inferior and aroused no enthusiasm. Other introductions were attempted in 1911 but all the plants died in transit. In 1913, a horticulturist of the Philippine Bureau of Agriculture was given the assignment of collecting the best types of pummelos in Thailand. He shipped to San Francisco one tree of a 'Bangkok' type that had been introduced into the Philippines in 1912; it was planted in the greenhouse of the Plant Introduction Garden at Chico. When it fruited several years later, the fruit was of such poor quality that it was considered useless. However, budwood was sent to Riverside and grafted onto two grapefruit trees growing on sour orange rootstock. One of the trees died but the other bore high-quality fruits which were much admired. Budwood was sent to different locations in Florida. In 1919, two trees of a superior pummelo (possibly 'Hao Phuang') from Thailand, which had been doing well in the Philippines, were shipped to the United States Quarantine Station in Bethesda, Maryland, and one of these survived. In addition, seeds from Thailand and from fruits in Chinese markets had been sent to Washington and seedlings were growing in greenhouses.
Dr. Fairchild was eager to introduce the red-fleshed type he had enjoyed in 1899. In 1926, he collected budwood at a hotel in Bandoeng and sent it, together with seeds, to the United States Department of Agriculture but they did not survive the trip. However, seeds of a cultivar in Kediri with flesh nearly as red as his ideal pummelo did reach the Citrus Quarantine Station in Bethesda, Maryland (as S.P.I. No. 67641), and the seedlings were grown there successfully.
In all the succeeding years, the pummelo has never attained significant status in this hemisphere. Generally, it is casually grown as a curiosity in private gardens in Florida and the Caribbean area, and mainly for experimental and breeding purposes at the United States Department of Agriculture's research stations in Orlando and Leesburg, Florida, and at Indio, California, and Mayaguez, Puerto Rico, and at the University of California's Citrus Experiment Station, Riverside. There are small commercial plantings in southern Mexico furnishing fruits for local markets. At least one fruit-grower in Lady-lake, Florida, raises pummelos on a small commercial scale. He ships the fruits to New York's Chinatown for $3 each for Chinese New Year festivities. They must be 5 in (12.5 cm) or more in diameter
According to the K-12 Teaching and Learning From the UNC School of Education, the use bulletin boards is to reinforce instructional goals. It is use to create a calendar. Use bright colors, patterns, or perhaps a different numbering system. For example, you could use Roman numerals, a periodic table of elements numbering system, Morse Code, etc. In the primary grades the calendar is a wonderful medium for introducing, extending, and reviewing mathematical concepts. Use the calendar to display schedules of upcoming events such as PTA meetings, sports, or other school activities.
It display maps, charts, graphs, and book jackets related to current and continuing study. Display numbers, letters, poems, songs, and sight words. These signs are key elements of the print-rich environment that whole-language advocates recommend. It display posters, photographs, and other information relating to a unit being studied. These displays add valuable visual support to current topics. It create a class theme. Many teachers choose, or have their students choose, a year-long theme to tie their units of study together. A bulletin board is a surface intended for the posting of public messages, for example, to advertise items wanted or for sale, announce events, or provide information. Bulletin boards are often made of a material such as cork to facilitate addition and removal of messages, or they can be placed on computer networks so people can leave and erase messages for other people to read and see.
Bulletin boards are particularly prevalent at universities. They are used by many sports groups and extracurricular groups and anything from local shops to official notices. Dormitory corridors, well-trafficked hallways, lobbies, and freestanding kiosks often have cork boards attached to facilitate the posting of notices. At some universities, lampposts, bollards, trees, and walls often become impromptu posting sites in areas where official boards are sparse in number.
Internet forums replacement for traditional bulletin boards. Online bulletin boards are sometimes referred to as message boards. The terms bulletin board, message board and even Internet forum are interchangeable, although often one bulletin board or message board can contain a number of Internet forums or discussion groups. An online board can serve the same purpose as a physical bulletin board. Magnet boards, or magnetic bulletin boards, are a popular substitute for cork boards because they lack the problem of board deterioration from the insertion and removal of pins over time