afforestation. young firs planted

advance afforestation aftergrowth arboriculture breed breeding conifer coniferous crop fir firs firtree flinty forest forestry grass grew ground growing growth husbandry little management northern pine planted plot regrowth sand sandy science second sector silviculture small softwood soil soils species spruce staddle summer sylviculture system taiga tamarack till tree trees undergrowth wood young zone