The Writing was written by: Md. Raisul Islam Milu
Date:07-03-2010
Signature:
IMPORTANCE OF PLANTATION
Importance of tree plantation now very importance in the present world. If we want we can change our world with tree plantation. Although estimates vary, the total area of forest plantations in the world amount to between 120 and 140 million hectares. What is less uncertain is that the amount of new planting (afforestation) is increasing in both temperate and tropical countries. In the tropics especially the present rate of planting of 2-3 million hectares per year is double that recorded in the 1960s and 1970s (FAO 1992; Evans 1992). The purpose of such plantations is mostly either for industrial production or domestic use as building poles, fuelwood and fodder.
The great bulk of forest plantations are of uniform age and uniform composition (monoculture) and most are managed to optimise the yield of wood from the site. Also, clearfelling and replanting is the commonest silvicultural system, although, where appropriate, coppicing is used as a means of re-stocking. These features of plantation silviculture - uniformity of crop, intensity of production and concentration of working - have raised concerns that many of the sites on which trees are planted may be incapable of sustaining their productivity. Models of nutrient export, examination of physical damage of soil structure, and claims of greater risk from pests and diseases have all been advanced as reasons why intensive plantation forestry may be inherently unsustainable.
Date:07-03-2010
Signature:
IMPORTANCE OF PLANTATION
Importance of tree plantation now very importance in the present world. If we want we can change our world with tree plantation. Although estimates vary, the total area of forest plantations in the world amount to between 120 and 140 million hectares. What is less uncertain is that the amount of new planting (afforestation) is increasing in both temperate and tropical countries. In the tropics especially the present rate of planting of 2-3 million hectares per year is double that recorded in the 1960s and 1970s (FAO 1992; Evans 1992). The purpose of such plantations is mostly either for industrial production or domestic use as building poles, fuelwood and fodder.
The great bulk of forest plantations are of uniform age and uniform composition (monoculture) and most are managed to optimise the yield of wood from the site. Also, clearfelling and replanting is the commonest silvicultural system, although, where appropriate, coppicing is used as a means of re-stocking. These features of plantation silviculture - uniformity of crop, intensity of production and concentration of working - have raised concerns that many of the sites on which trees are planted may be incapable of sustaining their productivity. Models of nutrient export, examination of physical damage of soil structure, and claims of greater risk from pests and diseases have all been advanced as reasons why intensive plantation forestry may be inherently unsustainable.
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