مستخدم:Ehab geek/ملعب

Ehab geek/ملعب  Green belts

  Green belts is a barrier vegetarian author of a row or several rows of trees and shrubs address winds before they reach the fields and orchards and thus break this wind and alleviated and thus of an adverse effect on plants and various crops, and network comprises belts of: A - major belts and be perpendicular to the direction of the prevailing wind. B - secondary belts and be perpendicular to the direction of fenders Home Benefits of green belts: 1-increasing agricultural crop yields The wind direct mechanical impact on the plants and various agricultural crops such as uprooted and broken branches and drop their flowers and fruit. Leading to inflict damage national income and who proved it time experiences in many countries that the belts increase yield by up to 50%, depending on the severity of the wind and the nature of the soil and crop type. 2-protect the soil from erosion Begin soil particles which diameter 0.1-0.15 mm moving from place when wind up to 14 km / h and at a height of 15 cm above the ground, these tiny beads rotate rapidly around itself updated vacuum beside them, which leads to its launch and jumping to a small distance and high up to 4 meters, and then move mud and silt particles into the high atmosphere the updated dust storms (Agag), while crawling large granules of sand for a short distance on the earth's surface and repeated this process very quickly And a direct impact on trees to repel and breaking wind and reduce speed to less than the speed of the beginning of the drift. The trees and plants in general are an obstacle to crawl and move soil particles by wind or water due to the mechanical qualities that characterize the roots of plants installed for arable soil and prevent their transfer from one place to another. 3-to reduce evaporation and water conservation The green belts when addressing the severe winds and broken unity to reduce the evaporation of moisture on the surface of the soil, as well as the loss of water from plants as a result of excessive transpiration aggregate normal ambient air to move plants and essentially saturated with Moisture 4-Protection of Birds and Animals The belts provide shade for the animals and birds in summer and warmth and shelter Secretary Winter and good pasture to feed the bees and the necessary protection from strong winds that may be the cause of low production animals in general.

  5-Miscellaneous benefits A - securing wood for fuel and wood for building and other than the farmer needs - Beauty farms and fields C - moderate climate topical and local levels D - defense and health benefits, social and others Forest species used in the creation of green belts Must be available in the selected tree species to create green belts following 1-prefers to be fast growth 2-Total radically strong and Teddy 3-evergreen as possible 4-suitable for the soil and climate 5-resistance to diseases and insects 6-yielding good or wooden fruits useful or feed nutritious   Cultivate green belts In order to be meaningful and belts to be effective establishment of a public network covers the entire region and to be major belts perpendicular to the prevailing wind direction and secondary belts perpendicular to the major. We include following table optimal distance between the belts as well as the number of rows per belt and the degree of penetration required

  1- www.reefnet.gov.sy/consultations/consultation_forum.php Engineer Farooq Ahmad 2-University of Bahrain, and Islamic Research and Training Institute

Halliday, Stephen (2004). Underground to Everywhere. Sutton Publishing Limited. pp. 118. ISBN 0-7509-3843-9.

3- National Capital Commission. "National Capital Commission :: The National Capital Greenbelt :: History and Culture." National Capital Commission - Commission De La Capitale Nationale (NCC-CCN). 07 Dec. 2007. NCC-CCN. Accessed 28 June 2008.

4-St. Paul Pioneer Press (MN) - April 22, 2007 - A1 MAIN  Research/ Google Books, new edition 2002. Chapter two: “Greenbelt Barriers To Urban Expansion.” ISBN 978-0-906321-21-8
5-Osman Adli Badran and Ezzat Qandil, the basics of science and timber technology, Egypt, Knowledge House, 1971, p 76.

6-Golany,Gidon,Urban Planning for Arid Zone by John Wiley and Sons,inc,New York,1978.