Mapping the Impact of Intensive Rotational Grazing on Soil Fertility Over Time on Greenbrier Farms in Pickens County, South Carolina

Intensive rotational grazing (IRG) is a management technique that involves a more intentional management approach which includes increased paddock numbers, shorter grazing periods, larger livestock presence per acre, and longer periods of rest on pastures. Potential advantages of this management technique include improved forage quality, greater yield, decreased erosion, stable production during adverse growing condition, and improved soil fertility. This study collects and analyzes data to understand the impact of rotational grazing on soil fertility as measured by SOC (soil organic carbon) and SON (soil organic nitrogen) on Greenbrier Farms in Easley, South Carolina. This study analyzes the transition from open grazing to five years of intensive rotational to observe the change in SOC and SON levels. The existing evidence on the intensive rotational grazing process is merely anecdotal and lacks sufficient data, but suggests that improved SOC and SON ratios should be expected. The purpose of this study is to provide some of the first, comprehensive scientific data regarding the impact that intensive rotational grazing has on soil fertility as measured by SOC and SON ratios and map the observed changes to visually portray the findings. Mapping the changes in SOC and SON ratios overtime will provide an opportunity to analyze the trends in data and how they correspond to their location. The implications of scientifically supporting intensive rotational grazing as a method of improving soil fertility on pasture land has the potential to promote sustainable agriculture as a feasible practice, both environmentally and economically, which is becoming increasingly valuable considering the observed and projected global population growth

Elemental Abundances in M31: Alpha and Iron Element Abundances from Low-Resolution Resolved Stellar Spectroscopy in the Stellar Halo

Measurements of [Fe/H] and [$\alpha$/Fe] can probe the minor merging history of a galaxy, providing a direct way to test the hierarchical assembly paradigm. While measurements of [$\alpha$/Fe] have been made in the stellar halo of the Milky Way, little is known about detailed chemical abundances in the stellar halo of M31. To make progress with existing telescopes, we apply spectral synthesis to low-resolution DEIMOS spectroscopy (R $\sim$ 2500 at 7000 Angstroms) across a wide spectral range (4500 Angstroms $<$ $\lambda$ $<$ 9100 Angstroms). By applying our technique to low-resolution spectra of 170 giant stars in 5 MW globular clusters, we demonstrate that our technique reproduces previous measurements from higher resolution spectroscopy. Based on the intrinsic dispersion in [Fe/H] and [$\alpha$/Fe] of individual stars in our combined cluster sample, we estimate systematic uncertainties of $\sim$0.11 dex and $\sim$0.09 dex in [Fe/H] and [$\alpha$/Fe], respectively. We apply our method to deep, low-resolution spectra of 11 red giant branch stars in the smooth halo of M31, resulting in higher signal-to-noise per spectral resolution element compared to DEIMOS medium-resolution spectroscopy, given the same exposure time and conditions. We find $\langle$[$\alpha$/Fe]$\rangle$ = 0.49 $\pm$ 0.29 dex and $\langle$[Fe/H]$\rangle$ = 1.59 $\pm$ 0.56 dex for our sample. This implies that---much like the Milky Way---the smooth halo of M31 is likely composed of disrupted dwarf galaxies with truncated star formation histories that were accreted early in the halo's formation.Comment: 21 pages, 14 figures, accepted to Ap

Margaret Chase Smith Essay: High School Student Essay Winners

Maine has benefited from the public service of many well-respected and influential national leaders over the last two centuries. One of them, Senator Margaret Chase Smith, offered her reflections on leadership at a time when the United States faced a struggle for civil rights at home and the tensions of the Cold War abroad. With the country currently confronting challenges such as the threat of terrorism, ongoing tensions in the Middle East, and the taint of corporate scandals, the Margaret Chase Smith Library annual essay contest invited Maine high school seniors to reflect on the qualities leaders will need to possess in order to be more effective in the twenty-first century. We feature here the three top prize-winning essays by Emily Parker (first), Rachel Culley (second) and Miles Kirby (third)

Elemental Abundances in M31: A Comparative Analysis of Alpha and Iron Element Abundances in the the Outer Disk, Giant Stellar Stream, and Inner Halo of M31

We measured [Fe/H] and [α/Fe] using spectral synthesis of low-resolution stellar spectroscopy for 70 individual red-giant-branch stars across four fields spanning the outer disk, Giant Stellar Stream (GSS), and inner halo of M31. Fields at M31-centric projected distances of 23 kpc in the halo, 12 kpc in the halo, 22 kpc in the GSS, and 26 kpc in the outer disk are α-enhanced, with ⟨ [α/Fe]〉= 0.43, 0.50, 0.41, and 0.58, respectively. The 23 and 12 kpc halo fields are relatively metal-poor, with ⟨ [Fe/H]⟩ = −1.54 and −1.30, whereas the 22 kpc GSS and 26 kpc outer disk fields are relatively metal-rich with ⟨ [Fe/H]⟩ = −0.84 and −0.92, respectively. For fields with substructure, we separated the stellar populations into kinematically hot stellar halo components and kinematically cold components. We did not find any evidence of a radial [α/Fe] gradient along the high surface brightness core of the GSS between ~17 and 22 kpc. However, we found tentative suggestions of a negative radial [α/Fe] gradient in the stellar halo, which may indicate that different progenitor(s) or formation mechanisms contributed to the build up of the inner versus outer halo. Additionally, the [α/Fe] distribution of the metal-rich ([Fe/H] > −1.5), smooth inner stellar halo (r_(proj) ≾ 26 kpc) is inconsistent with having formed from the disruption of a progenitor(s) similar to present-day M31 satellite galaxies. The 26 kpc outer disk is most likely associated with the extended disk of M31, where its high α-enhancement provides support for an episode of rapid star formation in M31's disk possibly induced by a major merger

Promoting Health Across the Lifespan: Relationships Topics

This document contains six lesson plans. The first lesson plan is designed to address sex in U.S. culture. The second lesson plan addresses healthy young adult relationships through the lenses of warning signs of unhealthy relationships, dating violence, and through the introduction of methods to improve an unhealthy relationship. The third lesson plan discusses healthy relationships utilizing self-assessment. The fourth lesson plan includes statistics about STIs and is designed to help identify prevention behaviors for safe sex. The fifth lesson plan is designed to address the principle of consent and information about sexual violence. The sixth lesson plan is designed as a simulation game to address the decision making process for individuals affected by an STI or unplanned pregnancy and provides resources for real encounters with these events. The content is intended for college-aged students and health care professionals. Each lesson plan has a topic overview, time and format information, Healthy People 2020 Objectives, National Health Education Standards information, learning objectives, key concepts and terms, materials needed, and teaching steps. This material was developed by Plymouth State University students as a part of their coursework for Promoting Health Across the Lifespan, in fall 2016 with Dr. Barbara McCahan

Chapter Genetics of Familial Amyotrophic Lateral Sclerosis

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Genetics of Familial Amyotrophic Lateral Sclerosis

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