BACKGROUND Studies involving the built environment have typically relied on US Census data to measure residential density. However, census geographic units are often unsuited to health-related research, especially in rural areas where development is clustered and discontinuous. OBJECTIVE We evaluated the accuracy of both standard census methods and alternative GIS-based methods to measure rur...

When I arrived in Lancaster County, in May of 1989, every acre of land seemed to be for sale. The county's farmland preservation program that I was to head had saved only 5,600 acres, less than one percent of the entire county. Comments Reprinted from Planning, January 2000, pages 14-17. This journal article is available at ScholarlyCommons: http://repository.upenn.edu/cplan_papers/27 Copyright...

Supplemental feeding is a tool for enhancing northern and some of the economic implications of feeding. This bobwhite (Colinus virginianus) populations on hunting leases in South Texas. Feeding may be used to improve winter survival, reproduction and/or harvest of birds. Before implementing a feeding program, operators should consider management goals and the factors limiting quail populations....

This cross-sectional study with university students examined the prevalence of regular consumption of fruits and vegetables and associated factors among students at a Federal university in Rio Branco, Acre State, Brazil. 863 undergraduates were interviewed in 2010. Overall prevalence of regular consumption of fruits and vegetables was 14.8%. Factors associated with regular consumption of fruits...

Due to payoff uncertainties combined with risk aversion and/or real options, farmers may demand a premium in order to adopt conservation tillage practices, over and above the compensation for the expected profit losses (if any). We propose a method of directly estimating the financial incentives for adopting conservation tillage and distinguishing between the expected payoff and the premium of ...

Herbicide efficacy studies reporting corn yields published in the North Central Weed Science Society Research Report were analyzed to calculate average corn yields for treatments either containing atrazine or not containing atrazine. To prevent unequal comparisons, studies and treatments had to meet conservative selection criteria in order to be included in the analysis. Treatments had to contr...

Materials and Methods The Neely-Kinyon LTAR site was established in 1998 to study the long-term effects of organic production in Iowa. Treatments at the LTAR site, replicated four times in a completely randomized design, include the following rotations: conventional CornSoybean (C-S), organic Corn-SoybeanOats/Alfalfa (C-S-O/A), organic CornSoybean-Oats/Alfalfa-Alfalfa (C-S-O/A-A) and organic Co...

INTRODUCTION This paper reports, for the first time, the presence of Rhodnius stali in the state of Acre and in the Brazilian Amazon. METHODS Specimens of R. stali were collected by the Federal University of Acre in Rio Branco. RESULTS The number of Triatominae species in the State of Acre increased from five to six. This was also the first report of R. stali in the Brazilian Amazon. CONC...

Historically, water allocation focused on quantities demanded by consumptive uses. As quantity demand grows, efficient allocation among consumptive and nonconsumptive uses becomes more critical. This hedonic approach provides information regarding recreational and aesthetic (RA) value for a central Texas lake. The model indicates several statistically significant RA characteristics of housing; ...

this qualitative study analyzes the reasons of college students for learning english as a foreign language (efl) in costa rica and the reasons of high school students for learning german as a foreign language (gfl) in the us. it asks to what extent the learners’ reasons align with or deviate from neoliberal discourses that commodify foreign languages. the analysis of 27 interviews in a us high ...