. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. BLUE PINE IN THE HIMALAYAS 165. Figure 1 Map showing distribution of blue pine in Himalayas; from Critchfield and Little, 1966. MOIST LOWER-LEVEL MONSOON ZONE BLUE PINE The blue pine grows in limited open forests above the Pinus roxburghii belt. P. wallichiana may at places mix with the upper limit of the P. roxburghii belt or grow below it because of soil preference. Habitat and Soil These forests prefer cool, protected, well-drained, rock
. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. BLUE PINE IN THE HIMALAYAS 165. Figure 1 Map showing distribution of blue pine in Himalayas; from Critchfield and Little, 1966. MOIST LOWER-LEVEL MONSOON ZONE BLUE PINE The blue pine grows in limited open forests above the Pinus roxburghii belt. P. wallichiana may at places mix with the upper limit of the P. roxburghii belt or grow below it because of soil preference. Habitat and Soil These forests prefer cool, protected, well-drained, rocky mountain sites. They occur on grassy slopes, abandoned cultivated land, poor soils near low-lying villages, landslips, and forest land destroyed by fire. Mostly occurring in pure stands, they are also found mixed with broad-leaved trees and higher up with Cedrus deodara (Roxb.) G. Don and Quercus spp. In Kulu, blue pine grows mixed with or below p. roxburghii because of preference for soils like moist mica-schists or alluvia over quartzite (Troup, 1921; Puri, 1960). In Jalkurgad in the Ganga valley, the moist lower-level blue pine grows and spreads into P. roxburghii forests. In Nepal, this pine grows at a higher but narrower altitudinal range from 5,900 feet to an unknown upper limit. Tree Growth and Description The blue pine trees here are not tall, but show good vegetative growth and are well branched, often with light bluish glaucous-green, dense foliage of relatively longer and more flexible needles than in the moist upper-level blue pine. Flowering, Pollination and Seed-Set Flowering and seed-set are fairly good. In Simla hills (4,500 feet) and in Giri valley (4,000 feet) the stands flower and shed pollen during the second half of April, about 7 to 10 days earlier than the moist higher-level blue pines of Huttoo peak (10,500 feet). Female receptivity,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabil
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Keywords: ., bookauthoruni, bookcentury1900, booksubjectpine, booksubjecttrees
