This study employed qualitative research methods to explore the motivations, perceptions, and regional contextual factors that influence the management decisions of small-scale farmers in East Central Indiana (ECI). In-depth, semi-structured interviews with 15 key informants and 29 farmers were recorded, transcribed, and coded using content analysis to understand the factors most relevant to small-scale farming in the region. Several important themes and subthemes arose in the data related to farming motivations, barriers to farm sustainability, and farmer learning and education. The results of this study complement the findings of previous work that describe the complex framework farmers navigate when making decisions on the farm. Still, this study identifies subtle regional factors (i.e., market conditions, farming culture, local economy)that significantly impact farmers’ decisions, and emphasizes the importance of local context in crafting agricultural policies and outreach efforts. Implications and recommendations for East Central Indiana are discussed. / Department of Natural Resources and Environmental Management

The purpose of this study was to determine how agriculture on both the national and local level has responded to a variety-of cultural and technological factors, including governmental policies and international trade, during the years from 1920 to 1964. Darke and Mercer counties were chosen for the examination of local data because of their predominantly agricultural orientation.

Pacific salmon (Oncorhynchus spp.) are key elements of ecological systems, and play an important role in the cultural foundation of human societies. All species of wild salmon face multiple, simultaneous threats, with habitat degradation likely playing a key role in survival. Open net-pen salmon farms can degrade important nursery marine habitat for wild juvenile salmon by disrupting natural salmonid host-parasite dynamics. The first two chapters in this thesis examine louse parasitism of wild juvenile chum (Oncorhynchus keta), pink (O. gorbuscha), and sockeye salmon (O. nerka) in relation to their marine migration past salmon farms. I compare sites of low and high exposure to salmon farms, and include two areas without farms on British Columbia’s central and north coasts to assess baseline infection levels. Louse prevalence and abundance were lowest and most similar to natural baseline levels at low exposure sites, and highest at high exposure sites in all farm regions. A significantly greater proportion of the lice infecting juvenile chum and pink salmon were Lepeophtheirus salmonis at high exposure sites. Caligus clemensi was the principal louse species infecting all juveniles in areas without salmon farms, and at low exposure sites within salmon farm regions; C. clemensi was also the dominant louse to infect juvenile sockeye that migrated past farms. Mixed-effects modelling results showed that exposure to salmon farms was the most consistent factor to explain the variation in louse infection levels, and support my hypothesis that salmon farms are a major source of sea lice on juvenile wild salmon in regions with salmon farms. I discovered that juvenile sockeye at one particular location within the Georgia Strait hosted unusually high lice levels; this location was situated at a distance from salmon farms, but near a farm salmon processing facility. Upon further investigation, I found live sea lice, Lepeophtheirus salmonis, mucus, and fish tissue in effluent discharged from the processing facility. Sea lice transmitted from this source may pose a threat to wild salmon populations, and the release of potentially untreated offal, including blood water, is of considerable concern. These results form the third chapter in my thesis. Given the challenges facing juvenile salmon in general, and sockeye from the Fraser River in particular (i.e., 2009 was the lowest return on record), and because poor habitat conditions within Georgia Strait are considered the major cause of the recent decline in Fraser River sockeye, this raises the question as to whether food limitations are a factor. The final chapter in my thesis examines the prey assemblage, diet composition, and foraging selectivity of juvenile sockeye, and investigates whether food limitations can be detected during early migration through Georgia Strait. Juvenile sockeye demonstrated high prey diversity, with preference for particular prey. Prey were more concentrated in the north, which may help explain migratory behavior of juveniles through the study region, and temporal similarities in sockeye foraging success may reflect short-term food resource stability. Moreover, I could not find evidence of food limitations that might suggest juvenile sockeye were strongly food deprived during the years of this study. Finally, my thesis explores how best to conserve salmon populations given the multitude of stressors. Because stressors often interact to produce compound effects and unpredictable results, ranking the overall threats in order of severity may not be useful. Instead, the most successful ranking system may be in terms of reducing harm where possible. For juvenile salmon during their early marine migration, risks posed by salmon farms can be more easily mitigated than the far-reaching effects on ocean productivity of climate change and ocean acidification, or predator removal. I recommend we begin here. / Graduate

This thesis contributes to the established literature on farm women within the context of family farming. It recognises that not enough is yet known about the discourses and agency which influence their lives. Consequently, this study has sought to establish what dominant discourses shape the lives of farm women, their responses to these discourses and how their discursive positioning influences their agency. This study employed a qualitative case study approach involving interviews with a diverse mixture of independent farm women, along with women farming in marital relationships. This thesis engages these narratives to showcase the colourful, complex life-experiences of farm women. In addition, and where present, women�s partners were interviewed to provide male farmers� perspectives about women in family farming. This research has found that women�s lives are shaped by positioning and contextualising discourses, with which they comply to ensure that the family farm survives. Their subservient discursive positioning limits the agency they can express, although they are able to mobilise indirect agency through supporting their partner; an implicit form of agency which has previously been unrecognised or understated. Cumulatively, this thesis highlights the need to recognise the diversity of farm women, and how they are able to exercise agency from their constrained subject positions within the family farming context. Furthermore it emphasises that agency is a dynamic, and far more varied concept than previously understood.

Eucalypts are a major forest resource globally and the area of eucalypt plantations for pulp and paper production is expanding rapidly in Australia. Consequently, there is an increasing need to breed eucalypts with improved wood properties. Since many high value wood traits are under strong genetic control, identification of DNA markers linked to these traits will have application in breeding programs. In recent years there has been a shift in marker strategy away from QTL mapping in pedigrees to association studies in unrelated populations. In the latter approach, single nucleotide polymorphisms (SNPs) in candidate genes are screened to identify SNPs that significantly associate with wood traits. Significant SNPs could be used for marker-assisted selection (MAS) in breeding programs. The objectives of this study were to identify candidate genes that may influence pulp yield in eucalypts and to identify SNP variants in those genes that associate with superior wood and pulp traits. / Approximately 300 trees from a full-sib Eucalyptus nitens progeny derived from a wide intra specific cross were used for gene discovery. DNA microarrays containing ~5800 young xylem of cDNAs Eucalyptus grandis were screened with probes synthesised from RNA isolated from trees with either high or low pulp yield. Forty-six transcripts were differentially regulated, of which 27 were more abundant in high pulp trees and 19 were more abundant in low pulp trees. All differentially expressed cDNAs were partially sequenced and searched against existing gene databases. Six genes were selected as putative pulp yield candidate genes based on their significant similarity to genes with known function and were named EgrCesA3 (cellulose synthase), EgrNAM1 (NAM family protein), EgrXET (xyloglucan endotransglycosylase), EgrGalk (galactokinase), EgrHB1 (class III homeodomain leucine zipper protein) and EgrZnf1 (C3HC4 type zinc finger protein). / Real-Time PCR was carried out on selected genes to confirm the accuracy of the microarray results. Full length cDNAs were obtained for EgrCesA3, EgrHB1 and EgrZnf1 and the candidate genes were partially characterised. An additional candidate gene, the novel gene EgrPAAPA, was selected based on previous research due to its high expression in the cambium and its expression in eucalypt branches. EgrPAAPA was cloned by screening an E. grandis cDNA library and fully sequenced. The full length EgrPAAPA encodes a short 172 amino acid protein rich in alanine, glutamic acid and proline residues. The EgrPAAPA protein appears to be a hydroxyproline-rich glycoprotein (HRGP) and the repetitive ‘PAAPA’ motif suggests that it might play a structural role in cell wall development. Southern blot analysis revealed that E. grandis has a single copy of the EgrPAAPA gene and northern blot analysis revealed that EgrPAAPA is most strongly expressed in xylem tissues. / Allelic variation in EnCesA3, EnNAM1, EnPAAPA and EnHB1 was examined by sequencing each gene in 16 to 24 unrelated E. nitens individuals. SNPs were identified by sequence analysis and patterns of nucleotide diversity, linkage disequilibrium and the selection of suitable polymorphisms were estimated. A moderate level of nucleotide diversity (θw = 0.0056 and π = 0.0039) was observed and linkage disequilibrium was generally low, extending only a few hundred base pairs in each gene. Negative selection has been operating in EnHB1. Selected TagSNPs from EnNAM1, EnHB1 and EnPAAPA were genotyped across 300 unrelated E. nitens trees which had been phenotyped for six wood quality traits including pulp yield, cellulose, lignin, Klason lignin, microfibril angle (MFA) and density. Five highly significant genetic associations (p<0.01) were detected between several SNPs in EnHB1 and all wood quality traits except density. A significant association was also found between EnPAAPA and MFA (p<0.05). No significant associations were found with any of the EnNAM1 SNPs. The strong genetic associations between SNPs in EnHB1 and a range of wood traits is consistent with this gene’s known role as a transcription factor controlling vascular development. Validation of these associations in different populations will be necessary in order to confirm these results. Alternatively, QTL mapping can be performed in order to confirm whether QTL for wood property traits can be detected at the EnHB1 and EnPAAPA loci.

This thesis argues that the multiple geographies of political practice are an important feature of activism. It investigates the women in agriculture movement, which is an informally connected web of groups and events working to increase the recognition and participation of women in Australian agriculture. By approaching agriculture as a political and social activity, as well as and economic one, the study demonstrates diverse relations to place, in the mobilisation of the women in agriculture movement. The thesis argues that the movement is challenging Australian agriculture through actions over a variety of sites, scales and spheres. / The thesis sets out to explain the development and impact of women in agriculture activism. In doing so it studies both the contexts and effects of the movement. Multiple dimensions of the movement’s contexts are examined: agricultural, political, discursive and locational dimensions are shown to have shaped its development and character. These dimensions have then been challenged by the movement as it acts on its agenda of recognition and participation. / Three case groups within the movement were investigated to demonstrate the personal, farm and public scales at which the activism of women in agriculture has had an impact. First, the individual and collective agency of participants, at a personal level, is noted as women negotiate diverse subject positions and experience the collective relational aspects of ‘movement politics’. Second, the impact of the movement is analysed at the level of the farm unit where it challenges many of the conventional arrangements operating within family farms. Third, the movement’s impact is described within a number of spheres of agricultural and community affairs. It is argued that the movement applied specific political strategies to farmer, industry, media and state spheres which resulted in the varying success of their goals for women’s increased recognition and participation in agriculture. / Analysis of the multiple geographies of activism illustrated by the women in agriculture movement reveals the political and discursive processes that operate to construct family farming. Moreover, it demonstrates the impact of activism where a movement strategically operates in multiple places and spaces to effect the social change and desires.

Thesis (Ph. D.)--University of Melbourne, 1990. / Spine title: The effects of management on dairy herd profitability. Typescript (photocopy). Includes bibliographical references (v. 1, p. 288-306).

Thesis (Ph.D.)--Murdoch University, 2006. / Thesis submitted to the Division of Science and Engineering. Bibliography: leaves 182-201.

Thesis (Ph.D.). / Written for the Dept. of Anthropology. Title from title page of PDF (viewed 2007/08/30). Includes bibliographical references.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 204-223). Also available via the Internet.