University of Georgia

About: University of Georgia is a education organization based out in Athens, Georgia, United States. It is known for research contribution in the topics: Population & Gene. The organization has 41934 authors who have published 93622 publications receiving 3713212 citations. The organization is also known as: UGA & Franklin College.

Effect of Peanut Hull and Pine Chip Biochar on Soil Nutrients, Corn Nutrient Status, and Yield

Abstract: Pyrolysis is the anaerobic thermal conversion of biomass for energy production. It offers an option of returning carbon and nutrients to the soil while producing energy. The Ultisols in the southeastern United States have inherently low soil organic carbon and fertility, and may benefit from the addition ofbiochar from pyrolysis. Our objectives were to evaluate the effect ofpeanut hull and pine chip biochars on soil nutrients, corn (Zea mays L.) nutrient status and yield in a Kandiudult for two growing seasons (2006 and 2007). Experiments for each biochar source were conducted as completely randomized designs with the biochar applied at 0, 11, and 22 Mg ha -1 with and without N fertilizer. Nitrogen in the peanut hull biochar (209 kg ha -1 at 11 Mg ha -1 rate) was not available during the study based on corn tissue concentrations. The peanut hull biochar linearly increased Mehlich I K, Ca, and Mg in the surface soil (0-15 cm). The increased available K was reflected in the plant tissue analysis at corn stage R1 in 2006, but not in 2007. Pine chip biochar decreased soil pH, but had no effect on other nutrients except Mehlich I Ca. In the peanut hull biochar experiment, grain yields decreased at the 22 Mg ha -1 rate in the fertilized treatments. In the pine chip biochar experiment, grain yields decreased linearly with application rate in 2006, but this did not persist in 2007. Overall yield responses to biochar were smaller than expected based on previous studies.

ToxoDB: an integrated Toxoplasma gondii database resource.

Abstract: ToxoDB (http://ToxoDB.org) is a genome and functional genomic database for the protozoan parasite Toxoplasma gondii. It incorporates the sequence and annotation of the T. gondii ME49 strain, as well as genome sequences for the GT1, VEG and RH (Chr Ia, Chr Ib) strains. Sequence information is integrated with various other genomic-scale data, including community annotation, ESTs, gene expression and proteomics data. ToxoDB has matured significantly since its initial release. Here we outline the numerous updates with respect to the data and increased functionality available on the website.

Age and Birth Cohort Differences in Self-Esteem: A Cross-Temporal Meta-Analysis

Abstract: A meta-analytic review finds that college students' self-esteem increased substantially between 1968 and 1994 when measured using the Rosenberg Self-Esteem Scale (RSE). Children's scores on the Coopersmith Self-Esteem Inventory (SEI) show a curvilinear pattern over time, decreasing from 1965 to 1979 and increasing from 1980 to 1993. Children's SEI scores are directly correlated with social statistics (e.g., divorce rate, unemployment) for the corresponding years. Analyses for age differences find that SEI scores decrease slightly during the transition from elementary school to junior high and then rise progressively through high school and college. RSE scores increase steadily with age. Results are discussed in terms of the antecedents of self-esteem, including social acceptance, competencies, and the culture of self-worth.

Considering quality in qualitative interviewing

Abstract: Within the field of qualitative inquiry, there has been considerable discussion of how ‘quality’ might be demonstrated by researchers in reports of studies. With the growth in the application of qualitative methods in social research, along with the proliferation of texts available to qualitative researchers over the last four decades, there has been increasing diversity in how quality has been demonstrated in reports. In this article, I focus on the use of qualitative interviews in research studies, arguing that with a growing array of theorizations of the qualitative interview, researchers must demonstrate the quality of their work in ways that are commensurate with their assumptions about their use of interviews. I sketch a number of possibilities for how qualitative interviews might be theorized, and show the different ways in which quality might be demonstrated from each perspective. I propose this typology as one means by which novice researchers might begin to work through design decisions involved...