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Lesson 1 – Regeneration Methods. Forest Science I Unit 6 – Reforestation Original by Jonathan H. Stribling December 3, 2001 Modified by Georgia Agriculture Education Curriculum Office July 2004 And CTAE Resource Network, 2010. Two Basic Types of Regeneration. Natural Artificial.
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Lesson 1 – Regeneration Methods Forest Science I Unit 6 – Reforestation Original by Jonathan H. Stribling December 3, 2001 Modified by Georgia Agriculture Education Curriculum Office July 2004 And CTAE Resource Network, 2010
Two Basic Types of Regeneration • Natural • Artificial
Natural Regeneration Advantages: • Low cost • Less labor and equipment required • Good early root development • Minimal visual impact • Less Soil erosion
Natural Regeneration Disadvantages • Less Control of Spacing and Stocking • Generally lower yield • No genetic improvement • No increased disease resistance • Possible Pre-commercial thinning required
Methods of Natural Regeneration • Seedtree • Shelterwood
Seed Tree • Most popular natural regeneration method • Leave 6-8 (10) trees per acre to reseed • Trees left need to be evenly distributed over area to be regenerated • Disadvantage -- Often cannot get a logger to come back for such a light volume of wood
Shelter Wood • Leaves more trees than seed tree (25-60) • Must plan ahead • Must control pioneer species in all regeneration methods (start 5 yrs or so before shelter wood cut. • Careful selection in deciding which trees to leave
Artificial Reforestation • Clearcut followed by either planting seedlings or direct seeding.
Artificial Reforestation Advantages • Control of Spacing and Stocking • Use of Genetically Improved Seedlings • Disease Resistant Seedlings • Allows for Change in Species
Artificial Reforestation Disadvantages • Homogenous Stand – More Susceptible • Visually Displeasing to Some People Some political action groups rally against artificial methods of reforestation.
Clear Cutting • Precedes planting seedlings or direct seeding • Cuts basically all timber off property
Artificial Regeneration • Planting Seedlings Hoedad Dibble Machine An experienced planter may plant 1000 seedlings per day manually!!!!!
Reforestation • Method Chosen will primarily depend on landowner objectives!!