concession
发表于 2025-3-21 17:56:42
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方舟
发表于 2025-3-21 20:52:38
Biology of Plantation Growth, trees need sunlight, carbon dioxide from the air, appropriate air and soil temperatures and water and nutrients from the soil. Tree leaves take in carbon dioxide from the air and, using energy from sunlight, convert it chemically to food to be used for the metabolic requirements of the tree. Tree b
radiograph
发表于 2025-3-22 02:53:01
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TOXIC
发表于 2025-3-22 06:12:15
Choosing the Species and Site,h to sell, its price is too high or government restrictions prevent certain land uses. As well, rural communities may feel threatened by the establishment of large areas of plantation forests in their region; consultation with them will be necessary to determine just what land is available, consiste
seroma
发表于 2025-3-22 11:24:09
Establishment,tion clearance, roading, drainage, building small bridges or culverts, fencing or establishing firebreaks. The next step is soil cultivation that disturbs and breaks up the soil to provide an optimum soil density and aeration for seedling root growth. Many different cultivation methods and types of
大洪水
发表于 2025-3-22 16:04:13
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大洪水
发表于 2025-3-22 20:56:38
Stand Density and Initial Spacing,y by the space available into which they may grow. When they have grown large enough to reach that maximum, smaller trees will start to die as a result of competitive pressures from larger trees. The more trees that are growing on a site, the sooner will they reach the maximum density and the greate
颠簸下上
发表于 2025-3-23 00:54:31
Thinning,ing, the remaining trees are able to increase their photosynthetic rates so there is no loss of growth overall. Over 2–3 years, the crowns and root systems of the remaining trees expand to replace what was lost at the thinning. After thinning, new growth is distributed amongst the fewer trees that r
grounded
发表于 2025-3-23 05:04:25
Pruning,s that are ultimately to be sawn to produce high quality timber; knots are the chief source of defect in sawn timber. Pruning often involves the removal of both live branches, that is branches with leaves still attached, and dead branches. As long as no more than about 30–50 % of the leaves on a tre
沙草纸
发表于 2025-3-23 07:19:46
Pests,ects or mammals. Many pests occur naturally in any plant ecosystem. It is only when the damage they cause is sufficient to threaten the viability of a plantation that they need be of practical concern. Various strategies are available to control pests including choice of the right tree species, plan