This document does not contain any substantive information to summarize in 3 sentences or less. It only contains the letter "g" repeated multiple times without any context.
Expand Access and Support Innovation with OER: Community College Consortium ...Una Daly
James Glapa-Grossklag, president of CCCOER, Dean College of the Canyons, CA; Lisa Storm, instructor at Hartnell College, CA; Preston Davis, Director of Extended Learning Institute at Northern Virginia Community College; James Sousa, Instructor at Phoenix Community College in Maricopa District, AZ. present innovative OER projects at their colleges that are saving students significant costs in textbooks and instructional materials with high-quality faculty developed OER.
Expand Access and Support Innovation with OER: Community College Consortium ...Una Daly
James Glapa-Grossklag, president of CCCOER, Dean College of the Canyons, CA; Lisa Storm, instructor at Hartnell College, CA; Preston Davis, Director of Extended Learning Institute at Northern Virginia Community College; James Sousa, Instructor at Phoenix Community College in Maricopa District, AZ. present innovative OER projects at their colleges that are saving students significant costs in textbooks and instructional materials with high-quality faculty developed OER.
Ammonia and Greenhouse Gas Surface Concentration Measurements from Beef Bedde...LPE Learning Center
Proceedings available at: http://www.extension.org/67570
Bedding material is used in livestock operations to facilitate manure management and provide comfort for the animal. However, the implications of bedding on fertilizer value and gaseous emissions are not fully understood. The objective of this study was to determine differences in ammonia (NH3), carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4) concentrations from bedded beef cattle manure related to manure pack age (0 to 3, 3 to 6 and 6 to 9 weeks), bedding material (corn stover (CS) or soybean stubble (SB)), and temperature (10°C or 40°C). Twenty four lab-scale manure packs were monitored in temperature and humidity-controlled chambers (n=2 per treatment). Freshly collected fecal material from an open feedlot, urine, and bedding were added weekly to the bedded packs. Flux chamber measurements from the pack headspace were analyzed for CO2, N2O, and CH4 after 0, 24, 46 and 144 h and for NH3 at 0, 5, 9, 23, 34, 46 and 144 h after material addition. At 40°C, NH3 concentrations for CS (2353 ppm, CV=0.60) were significantly higher than for SB (1674 ppm, CV=0.58) and both significantly higher than average NH3 concentrations at 10°C (772 pm, CV=0.79). Average concentrations for CO2 (6242 ppm, CV=0.74) and CH4 (45.3 ppm, CV=1.35) were approximately twice as high at 40°C as for CO2 (3197 ppm, CV=0.73) and CH4 (21.9 ppm, CV=1.04) at 10°C. Average N2O concentrations at 10°C for SB (0.31 ppm, CV=0.87) were significantly lower than the other average treatment concentrations (0.53 ppm, CV=1.30). Significant differences related to age were only observed for CH4 at 10°C and 40°C and CO2 at 10°C. Overall, temperature significantly increased all gas concentrations while bedding only affected NH3 at 40°C and N2O at 10°C by increasing concentrations when CS was used. The gas concentrations are supported by nutrient analyses and microbial enzymes activity potentials.
