. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. MITE PINES ASIA: ARMANP AND KOREAN PINE 131. Figure 6. Form of bark of Pinus '< on A) 100-year-old tree from a natural stand on Mt. Sorak and B) 40-year-old tree from a plantation at Kwangyang. lath during the first summer, and thinning to 400 seedlings/m2 of seed bed in the fall. The stock is removed from the seed beds as 2-0 seedlings between 12 and 15 cm tall. The form and distribution of the root system varies with the so
. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. MITE PINES ASIA: ARMANP AND KOREAN PINE 131. Figure 6. Form of bark of Pinus '< on A) 100-year-old tree from a natural stand on Mt. Sorak and B) 40-year-old tree from a plantation at Kwangyang. lath during the first summer, and thinning to 400 seedlings/m2 of seed bed in the fall. The stock is removed from the seed beds as 2-0 seedlings between 12 and 15 cm tall. The form and distribution of the root system varies with the soil characteristics. It has several (usually three to five) large roots stretching downward and outward in the soil giving the tree a firm anchor under most conditions. No serious root damage in the nursery or in plantations has so far been recorded, except a slight amount by cutworms in the seed beds. The common practice is to plant 2-0 or 2-1 seedlings at a spacing of 2 m. Growth is rather slow during the first 3 to 5 years after planting, but it gradually improves and thinning is needed by 20 years. Fifty to 80 years is the usual rotation for producing saw timber. Due to very poor self-pruning, a regular pruning practice is needed for production of knot-free logs (Fig. 7). With regard to pests and disease, the black tipped sawfly {Acantholyda posticalis Mats.) has caused some damage in a middle-aged plantation (Lee and Cho, 1959). Blister rust damage was first reported in 1937 (Takagi, 195") in an 8-year-old plantation in Kyunggido Province of Korea. Takagi reported that around 650 planted stocks expressed blister rust symptoms on their. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original North Atlantic Treaty Organization; International Union of Forestry Research Organizations; United States. Forest Serv
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Keywords: ., bookauthoruni, bookcentury1900, booksubjectpine, booksubjecttrees
