A COMPARISON OF DIFFERENT PLOT SIZES AND SHAPES EFFICIENCY TO ESTIMATE OF STANDING CROP IN STEPPE, HIGH-STEPPE AND SEMI-STEPPE REGIONS OF IRAN

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MOGHADDAM M.R.; GHORBANI PASHAKOLAEE J.

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Journal: IRANIAN JOURNAL OF NATURAL RESOURCES Year:2001 | Volume:54 | Issue:2 Page(s): 191-204

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Title

A COMPARISON OF DIFFERENT PLOT SIZES AND SHAPES EFFICIENCY TO ESTIMATE OF STANDING CROP IN STEPPE, HIGH-STEPPE AND SEMI-STEPPE REGIONS OF IRAN

Author(s)

MOGHADDAM M.R. | GHORBANI PASHAKOLAEE J. | Issue Writer Certificate

Keywords

PLOT SIZE AND SHAPEQ4

SAMPLING EFFICIENCYQ4

COEFFICIENT OF VARIATIONQ2

STANDING CORPQ3

DIFFERENT LIFE FORMSQ4

TOTAL FIELD TIMEQ4

Abstract

A part of SAMPLING EFFICIENCY depends on the correct selection of PLOT SIZE AND SHAPE. The objective of this study was to compare the SAMPLING EFFICIENCY for different plot sizes and shapes in estimation of standing crop on the steppe, high-steppe and semi-steppe regions of Iran. Eight plot sizes (0.25, 0.5, 1, 1.5, 2, 2.5, 3 and 4 square meters) and three plot shapes (square, rectangular and circular) were tested in each region. For each size and shape combination, thirty samples were taken along fifteen transects with random-systematic sampling. The statistical results of this study showed that small plot sizes usually had a non-normal distribution and maximum skewness. Also, the DIFFERENT LIFE FORMS of low density and scattered pattern had a non-normal distribution and maximum skewness. The weight variances of vegetation from various plot sizes were not homogeneous because these plots sampled different plant communities. The bigger plots usually had minimum COEFFICIENT OF VARIATION because they contained more variation of vegetation. Analysis of variance showed significant differences among polt sizes but, there were no significant differences among plot shapes. Optimum plot size depends on vegetation patterns, therefore optimum plot sizes were different for each life form. Optimum plot sizes for estimation of standing crop in steppe and high-steppe regions were 1 and 1.5 m2 and for semi-steppe 0.5 and 1 m2.

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APA: Copy

MOGHADDAM, M.R., & GHORBANI PASHAKOLAEE, J.. (2001). A COMPARISON OF DIFFERENT PLOT SIZES AND SHAPES EFFICIENCY TO ESTIMATE OF STANDING CROP IN STEPPE, HIGH-STEPPE AND SEMI-STEPPE REGIONS OF IRAN. IRANIAN JOURNAL OF NATURAL RESOURCES, 54(2), 191-204. SID. https://sid.ir/paper/22710/en

Vancouver: Copy

MOGHADDAM M.R., GHORBANI PASHAKOLAEE J.. A COMPARISON OF DIFFERENT PLOT SIZES AND SHAPES EFFICIENCY TO ESTIMATE OF STANDING CROP IN STEPPE, HIGH-STEPPE AND SEMI-STEPPE REGIONS OF IRAN. IRANIAN JOURNAL OF NATURAL RESOURCES[Internet]. 2001;54(2):191-204. Available from: https://sid.ir/paper/22710/en

IEEE: Copy

M.R. MOGHADDAM, and J. GHORBANI PASHAKOLAEE, “A COMPARISON OF DIFFERENT PLOT SIZES AND SHAPES EFFICIENCY TO ESTIMATE OF STANDING CROP IN STEPPE, HIGH-STEPPE AND SEMI-STEPPE REGIONS OF IRAN,” IRANIAN JOURNAL OF NATURAL RESOURCES, vol. 54, no. 2, pp. 191–204, 2001, [Online]. Available: https://sid.ir/paper/22710/en

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