A5061804863- Soil and Unsaturated Flow
- Soil Geostatistics and Mapping
- Soil Carbon and Nitrogen Dynamics
- Geology and Paleoclimatology Research
- Innovative Teaching Methods
- Soil erosion and sediment transport
- Evaluation of Teaching Practices
- Fire effects on ecosystems
- Diverse Educational Innovations Studies
- Soil Management and Crop Yield
- Problem and Project Based Learning
- Innovative Teaching and Learning Methods
- Geography Education and Pedagogy
- Landslides and related hazards
- Space Exploration and Technology
- Statistics Education and Methodologies
- Simulation Techniques and Applications
- Clay minerals and soil interactions
- Landfill Environmental Impact Studies
- Aeolian processes and effects
- Textile materials and evaluations
- Groundwater flow and contamination studies
- Soil and Water Nutrient Dynamics
- Innovations in Educational Methods
- Plant Water Relations and Carbon Dynamics
University of Nebraska–Lincoln
2019-2024
University of California, Riverside
2008-2022
Stockton University
2014-2016
Psychology researchers have long attempted to identify educational practices that improve student learning. However, experimental research on these is often conducted in laboratory contexts or a single course, which threatens the external validity of results. In this article, we establish an paradigm for evaluating benefits recommended across variety authentic contexts—a model call ManyClasses. The core feature examine same question and measure effect many classes spanning range topics,...
Vesicular horizons are thin (usually <10 cm) surface or near‐surface characterized by the predominance of vesicular porosity. They widespread in arid and semiarid lands, occurring on every continent covering 156,000 km 2 western United States. have critical implications for management due to their role controlling hydrology dust mobilization. This study evaluates distribution variation expression across States using soil databases available from USDA. A horizon index (VHI) that...
Abstract This study evaluated the effect of variable natural lighting on accuracy soil color determination using Munsell charts. The clouds, shade, and time day were measured by calculating distance between colors determined with charts a chromameter. only condition found to negatively affect was early‐morning light sunny days, this significant for individuals high overall at reading color. Regressions visual relative chromameter showed reduction in slope R 2 value chromas early morning (m =...
The role of forest soils in the biogeochemical cycling C and N is most dynamic during early stages soil development. To define trends that occur with development a mixed coniferous forest, chronosequence formed by debris flows was studied. accumulation rates total organic (TOC) (TN) were evaluated on 10 flow deposits, ranging from <1 to 244 yr old. Analysis mineral restricted 30‐cm depth, since this depth shallowest flows. Carbon found accumulate horizons at rate 26.5 g m −2 −1 throughout...
Abstract As with many aspects of teaching, the COVID‐19 pandemic forced soil judging teams to attempt new strategies towards achieving student learning outcomes. Soil Regions IV and V hosted remote regional contests in October 2020 place traditional, in‐person typically held each fall. We conducted pre‐ post‐contest surveys assess outcomes, attitudes, reflections on contest experience compared past, experiences. received 108 total responses from students who participated Region (>80%...
Vesicular horizons are common at the surface of arid and semiarid soils play a critical role in regulating infiltration. Most methods for examining pore morphology vesicular horizon involve physical sectioning sample individual measurement pores, which is time-consuming provides an incomplete view pores. The objectives this study were to (i) develop classification characterization pores using high resolution X-ray computed tomography (HRXCT) (ii) use these examine distribution within peds....
Core Ideas Lecture tutorials significantly improved students’ performance on quizzes for certain topics. were effective in courses majors and non-majors. Student ratings of lecture higher the course environmental science majors. Hands-on rated as most “fun” by students. The wide-array concepts from natural sciences that must be mastered to succeed an introductory soil presents a significant challenge This study was conducted determine if conceptual development regarding topics could using...
Abstract Iron‐coated indicatorof reduction in soils (IRIS) devices have been used for nearly two decades to help assess and document reducing conditions soils, official guidance has approved interpreting these data. Interest manganese (Mn)‐coated IRIS increased because Mn oxides are reduced under more moderately than iron (Fe) (which require strongly conditions), such that they expected be better proxies some important ecosystem services like denitrification. However, only recently the...
Psychology researchers have long attempted to identify educational practices that improve student learning. However, experimental research on these is often conducted in laboratory contexts or a single course, threatening the external validity of results. In this paper, we establish an paradigm for evaluating benefits recommended across variety authentic – model call ManyClasses. The core feature examine same question and measure effect many classes spanning range topics, institutions,...
Soil organic carbon (SOC) is a dynamic property that key indicator of soil management effectiveness within efforts toward climate change mitigation. This study was conducted to create locally-informed equations for predicting SOC from loss-on-ignition (LOI) analysis. samples were collected four counties across Nebraska. Total carbon, inorganic and LOI analyzed in the lab, calculated as difference between total carbon. Locally-trained relating evaluated. The accuracy predictions based on...
Abstract Soil structure is a standard component of pedon descriptions collected to characterize the nature and function soils as natural body. an important indicator soil development predictor water, air, root movement throughout profile. However, inconsistencies exist within current standardized methodologies used describe in field, making data difficult use often confusing students encountering these concepts for first time. Therefore, we propose updated method description add interpretive...
Abstract Student–student interactions are influential parts of field experiences. While competitive judging events a fun way to engage students in field‐based learning, the focus on competition leads an atmosphere that discourages collaboration between students. The objective this study was evaluate cognitive and affective learning outcomes resulting from intercollegiate at soil competition. Teams with two three different universities were assigned referred as jumble teams. Jumble held for...
The clod method is a widely used and accurate bulk density method. However, its use limited to sampling from soil pits. This study was conducted to: 1) determine whether clods collected cores provide similar measurements those pits 2) evaluate the impact of various methods on carbon stock calculation. Clods were pits, 5.1 cm cores, 8.9 cores. Three-dimensional laser scanning measure volume before after oven-drying calculated as dry mass divided by volume. Of 24 horizons sampled, 17 showed no...
Abstract Rapid formation of vesicular pores has been observed following disturbance (V) horizons. This study investigates the post‐disturbance recovery V horizons and impact on hydraulic properties. At nine sites, infiltration rates were measured using a tension disk infiltrometer, intact samples collected for analysis high‐resolution x‐ray computed tomography (CT). The horizon material was then removed, crushed, replaced, left to recover 1 yr before repeating measurement CT analysis. Some...
Understanding soil systems that characterize a region is critical to natural resource management. However, the knowledge gained through intensive study of local systems, which takes place annually as part collegiate judging contests, often poorly preserved for future use. In this study, field descriptions and laboratory data 16 profiles described 2019 Region 5 Soil Judging Contest were used system Central Nebraska Loess Hills Plains. Three landscape components analyzed: loess uplands...
Estimation of soil texture is an essential skill for scientists, but a difficult to learn. We compared two approaches teaching texture: the traditional flowchart approach and experimental self-calibration method. Three lab sections introductory science class were assigned learn by method (n = 60) three 53). Students who learned recorded data observations related clay (i.e., cohesion plasticity) sand volume remaining after separating washing) instructors used this provide each student with...
Abstract Literature circles are student‐led, small‐group discussions that promote active learning and engagement with literary texts. The objective of this study was to assess the impact literature on student outcomes in a pedology course. For various reading assignments throughout semester, students either participated circle or watched lecture. two class formats were compared terms subject matter covered, attitudes survey, students’ use material from readings essay‐style exam questions....