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Filtering by: Committee Member Paine, David Creator Zumrawi, Abdel Azim M. A.

Examining bias in estimating the response variable and assessing the effect of using alternative plot designs to measure predictor variables in diameter growth modeling

Creator:

Zumrawi, Abdel Azim M. A.

Abstract:

Diameter growth of Douglas-fir (Pseudotsuqa menziesii (Mirb.) Franco) estimated from increment cores was compared with that obtained from repeated measurements of tree diameter on permanent plots located in two Douglas-fir study areas in the central Coast Range of Oregon. Growth was measured for a 6-year period (1979- 1985). Diameter growth...

Resource Type:

Dissertation
Effects of stand density on site index in thinned stands of Douglas-fir in the Pacific Northwest

Creator:

Zumrawi, Abdel Azim M. A.

Abstract:

In site index studies, the hypothesis that height growth of most conifers is independent of stand density is commonly accepted. However, some studies have shown height growth to be influenced by density particularly on medium to poor sites. In this study two locations representing a high quality site (Hoskins area,...

Resource Type:

Masters Thesis