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31 There is very close correlation between the stumpage volume percent of poplar timber assortment and the stumpages D.

32 At the back, a flower garden slopes down to a line of poplar trees.

33 The leaves of the poplar trees rustled in the wind.

34 Smallholder farmers, for example, also use the cut stems of poplar for cultivating mushrooms in their greenhouses.

35 The annual ring width of Poplar was positively related to the number of radical fiber cell, number of vessel and fiber proportion.

36 Thecolor of sapwood of Chinese white poplar among trees has significant difference.

37 She popped back behind the poplar tree and was gone.

38 The hybrid origination of Chinese white poplar was directly proved from the viewpoint of cytogenetics.

39 But poplar production is severely threatened by certain insect pests, e. g. , Hyphantria cunea. Therefore, it is of great significance to breed poplar varieties with high insect resistance.

40 The expression of poplar disease resistance in callus tissues is greatly affected by concentration of auxins and cytokinins in the medium, inoculum density and temperature.

41 It is important to cultivate poplar that can resist insect. Transgenosis technology has become main means to improve the quality of insect-resistant of present plant by creating new varieties.

42 Preliminary Evaluation of Integrated Benefit of Resistance to Poplar Long-horned Beetle Disaster of Different Tree Species Configuration.

43 The original Mona Lisa is an oil painting on a board of poplar and is housed at the Louvre Museum in Paris.

44 The paper introduces the technological process, equipment, technological conditions and preparation results of making chemimechamicalpulp with APSP ultra-short term black poplar of small diameter log.

45 The corresponding frequency of the key parts of the poplar particle presswood pallet at maximal transmissibility was determined by frequency sweep test.

46 One very special photo was taken of Frank and his four daughters under the golden poplar tree where Dasey had planted daffodils two years previously.

47 The poplar trees lined the redbrick driveway, which led to a pair of wrought-iron gates.

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48 With fast - growing rate and high - quality wood white poplar triploids are suitable for producing short - rotation pulpwood timbers.

49 The conclusions showed that:1, There were significantly differences on the variation amplitude of ROS in the different poplar varieties (species) after inoculated with Melampsora larici-populina Kleb.

50 Cryptorrhynchus lapathi is an important trunk borer of poplar and nationwide object of forest plants quarantine.

51 Mainly introduced the various measures and the ways adopted by Chengde Landscape Administration Bureau to control the flying willow catkin and poplar tree blowball.

52 Jacob, however, took fresh-cut branches from poplar, almond and plane trees and made white stripes on them by peeling the bark and exposing the white inner wood of the branches.

53 In this research, random screening of 10 SSR primers from Populus and Salix, respectively, and the genetic relationship among 17 poplar cultivars and 20 willow cultivars were studied.

54 A report is made of the study of chemical components of the odor with luring activity from withered black poplar leaves.

55 The Euphrates Poplar Forestsare highly adapted to the special and dynamic conditions of the Tarim River at the edge of the Taklamakan Desert.

56 But also has the many problems, exists comparatively restricts the Jiangsu poplar tree industry fast health development the bottleneck.

57 They sacrifice on the mountaintops and burn offerings on the hills, under oak, poplar and terebinth, where the shade is pleasant .

58 After that measures for implementing the strategy are put forward in the aspects poplar silviculture, poplar wood processing and relevant policies.

59 The commercial trial verified that the cigarette paper made of poplar pulp can be substituted for the imported product, and the demand of reducing the tar can be realized.

60 After a while, we found a shady place under some poplar trees.