The grading of Pinus kesiya var. langbianensis container seedling was studied by using stepwise cluster analysis. Height and base diameter were proposed as the quality indexes for grading, the criteria for class Ⅰ, ...The grading of Pinus kesiya var. langbianensis container seedling was studied by using stepwise cluster analysis. Height and base diameter were proposed as the quality indexes for grading, the criteria for class Ⅰ, Ⅱand Ⅲ were height≥18.5 cm, base diameter≥0.29cm, 18.5 cm>height≥15.5 cm, 0.29 cm>base diameter≥0.24 cm, and height<15.5 cm, base diameter<0.24 cm respectively.展开更多
文摘The grading of Pinus kesiya var. langbianensis container seedling was studied by using stepwise cluster analysis. Height and base diameter were proposed as the quality indexes for grading, the criteria for class Ⅰ, Ⅱand Ⅲ were height≥18.5 cm, base diameter≥0.29cm, 18.5 cm>height≥15.5 cm, 0.29 cm>base diameter≥0.24 cm, and height<15.5 cm, base diameter<0.24 cm respectively.
