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The effects of inbreeding in a flock of Hampshire sheep

Creator:: Lamberson, William Russell
Abstract:: A registered flock of Hampshire sheep that had been predominantly closed for approximately 30 years was utilized to study the effects of inbreeding on productivity of the 1980 and 1981 lamb crops. Five generation pedigrees for ewes and rams were used to calculate inbreeding coefficients. The median inbreeding coefficient of...
Resource Type:: Masters Thesis
Full Text:: period and for his continuing friendship. I thank my committee members, Drs. William D. Hohenboken and

Soil compaction on a mechanized timber harvest operation in eastern Oregon

Creator:: Zaborske, Richard R.
Abstract:: The use of mechanized harvest equipment has been increasing as an economical method to harvest small diameter timber. While the use of this equipment is increasing, little is known about associated soil compaction. In particular, little information exists on soil compaction caused by feller--bunchers. This study measured soil compaction caused...
Resource Type:: Capstone Project

Cuphea wrightii tolerance to selected herbicides

Creator:: Cherif, Raouf
Resource Type:: Masters Thesis
Full Text:: committee members Drs. Arnold P Appleby, Ray D William, and Thomas E Bedell for their time and suggestions

The influence of the diurnal variation of stability on potential evaporation

Creator:: Ek, Michael Bryan
Abstract:: A method of calculating surface evapotranspiration by separately including the effects of vegetation and atmospheric evaporative demand under the condition of nonlimiting soil moisture is presented. A literature survey is conducted to determine the effects of plants on evapotranspiration. To represent the atmospheric evaporative demand, the original potential evaporation equation...
Resource Type:: Masters Thesis
Full Text:: members of my committee, Drs. Lyle D. Calvin, Hua-Lu Pan, and William MeDougal. Thanks also to Chris

An evaluation of weed interference in rice grown on hydromorphic soils in West Africa

Creator:: Diop, Amadou Makhtar
Abstract:: Field, screenhouse, and laboratory experiments were conducted to study weed interference in rice grown on hydromorphic soils at the International Institute of Tropical Agriculture (IITA) at Ibadan, Nigeria. Rice and weeds emerged at the same time, 1 week after planting. Weed dry weight was significantly reduced when the crop was...
Resource Type:: Dissertation
Full Text:: Burrill, G. Crabtree, and D. C. England for their time and support they have given me. I also thank R. D

Structure, abundance, and distribution of pelagic zooplankton in a deep, oligotrophic Caldera Lake

Creator:: Karnaugh, Elena N.
Abstract:: From July 1985 to April 1987 the pelagic zooplankton community of Crater Lake, Oregon was studied to determine taxonomic structure, absolute and relative densities, and spatial and temporal distributional patterns. Samples were collected using vertically-towed zooplankton nets. The community structure consisted of two cladoceran and nine rotifer species, which were...
Resource Type:: Masters Thesis
Full Text:: in some years and rare in others. During this study, D. pulicaria abundances were low but appeared

Methods of evaluation, effects of intermating and results of one cycle of S₁ family recurrent selection in barley

Creator:: Mareck, James
Abstract:: The focus of this study was to determine if S₁ family recurrent selection might be successfully used for barley improvement. Objectives were: 1) to identify suitable methods of evaluating grain yield in small plots, 2) to study the effects of intermating on mean values and variances of selected agronomic characters,...
Resource Type:: Dissertation
Full Text:: to thank my graduate committee: Drs. William D. Hohenboken, Willis L. McCuistion, David L. Willis

Nature of inheritance, genotype-environment interaction and association of selected agronomic characters in crosses of winter X spring wheats (triticum aestivum L. em Thell)

Creator:: Brajcich, P.
Abstract:: This investigation was motivated by the apparent increase in genetic variability resulting from the systematic combining of gene pools represented by winter and spring types of wheats. It was the objective of this study to provide information regarding the nature of this genetic variability for nine agronomic characters in populations...
Resource Type:: Dissertation
Full Text:: preparation of this thesis. Appreciation is extended to Drs. Fred A. Cholick, Robert L. Powelson, William D

Single gene effects in chickens (Gallus gallus domesticus)

Creator:: Sadjadi, Morteza
Resource Type:: Dissertation
Full Text:: due to my graduate committee mem- bers, Drs. George H. Arscott, William D. Hohenboken, Kenneth E

Influence of competition on combining ability estimates and subsequent prediction of progeny performance in wheat (Triticum aestivum L. em Thell.)

Creator:: Corral, Leonardo R.
Resource Type:: Dissertation
Full Text:: also want to express my appreciation to Drs. William D. Hohenboken, Willis L. McCuistion, Dallice I

ScholarsArchive@OSU

The effects of inbreeding in a flock of Hampshire sheep

Soil compaction on a mechanized timber harvest operation in eastern Oregon

Cuphea wrightii tolerance to selected herbicides

The influence of the diurnal variation of stability on potential evaporation

An evaluation of weed interference in rice grown on hydromorphic soils in West Africa

Structure, abundance, and distribution of pelagic zooplankton in a deep, oligotrophic Caldera Lake

Methods of evaluation, effects of intermating and results of one cycle of S₁ family recurrent selection in barley

Nature of inheritance, genotype-environment interaction and association of selected agronomic characters in crosses of winter X spring wheats (triticum aestivum L. em Thell)

Single gene effects in chickens (Gallus gallus domesticus)

Influence of competition on combining ability estimates and subsequent prediction of progeny performance in wheat (Triticum aestivum L. em Thell.)

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