Forest Biometrics by Michail Prodan

By Michail Prodan

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Zinecker x = number of mitoses; n = frequency 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 15 85 376 856 1812 1818 1712 824 430 143 63 27 TABLE 19. Species Beech. Compressive strength in kgIcm2. From Hopmann, Forstmathematik in Forschung und Unter­ richt x = compressive strength; n = frequency 625 675 725 775 825 875 925 975 1025 3 2 29 37 43 41 40 10 2 207 15 4 8181 Figures 51-54 and Tables 20-21 demonstrate, however, that distributions do not always have the same form. The mistletoe example (Fig. 51) and the selection wood example (Fig.

2a FB CHAPTER 2 STATISTICAL SURVEYS THE techniques used in surveys are dependent on the defined purpose of each particular survey and the way in which a survey is planned should take into account the amount of data that it is necessary to collect. Indeed, the whole value of the data will depend critically on the care with which the survey is planned. From the wide and diverse field of application of the techniques of survey planning, only a few examples can be mentioned in this chapter. 1 Measurements.

51) and the selection wood example (Fig. 54) have a decreasing frequency distribution. In the distributions of the degree of cloud development (Table 20, Fig. 53) and in the distribution of needle loss (Table 21, Fig. 52) the frequencies in­ crease towards both ends of the characteristic scale. Measurements provide continuous variables, while counts or descriptions lead to discontinuous or discrete variables. Frequency Distributions. Concepts and Examples 47 FIG. 51 (left). (63) FIG. 52 (right).

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