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A Bremer wall, or T-wall, is a twelve-foot-tall (3.66 m) portable, steel-reinforced concrete blast wall of the type used for blast protection throughout Iraq and Afghanistan. The Bremer barrier resembles the smaller 3-foot-tall (0.91 m) Jersey barrier, which has been used widely for vehicle traffic control on coalition military bases in Iraq ...
Root barriers are also used to separate plant roots from each other. In particular, walnut trees secrete the chemical juglone which is toxic to other plants but the use of root barriers can prevent the yield reduction that would normally occur when walnut trees are alley cropped with maize as often occurs in the American Midwest. [3] [4]
Vegetative barriers are narrower buffer strips of hardy, native, perennial grasses or shrubs planted in parallel rows to crops. [5] They are very effective in reducing wind and water erosion which results in sediment trapping and water infiltration. They function in a similar fashion to a contour buffer strip, just much narrower. [1]
Tree height is the vertical distance between the base of the tree and the highest sprig at the top of the tree. The base of the tree is measured for both height and girth as being the elevation at which the pith of the tree intersects the ground surface beneath, or "where the acorn sprouted."
Nursery plants or slips (clumps) of about 3 tillers each, are typically planted 4-6 inches (10 – 15 cm) apart on the contour to create, when mature, a barrier of stiff grass that acts as a buffer and spreader of down slope water flow, and a filter to sediment. The development of strong plants and a deep root system requires full sun.
This allowed him to increase the ancient salt tax in Bengal from 0.3 rupees per maund (37 kg) to 3.25 rupees per maund by 1788, a rate that it remained at until 1879. [3] This brought in 6,257,470 rupees for the 1784–85 financial year , at a cost to an average Indian family of around two rupees per year (two months' income for a labourer). [ 4 ]
Common heights include one-foot increments from 3 feet (0.91 m) to 8 feet (2.4 m), and other heights including 3 feet 6 inches (1.07 m), 10 feet (3.0 m), and 12 feet (3.7 m) although almost any height is possible. Mesh is commonly 9, 11, or 11 + 1 ⁄ 2 wire gauge. Mesh length can also vary based on need, with the standard diamond size being 2 ...
The projects do not cost as much to construct and store the same amount, if not more, than the surface reservoirs. [6] The bank will have less of an impact on the environment than a surface reservoir. [6] The water that is in the bank will no longer be exposed to evaporation, but several feet per year of water is lost in the reservoirs. [6]
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