Life Sciences Commons^™

Growing South Dakota (Fall 2026), College Of Agriculture, Food And, Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 2 Support from donors helping set SDSU dairy graduates above the rest
[Page] 4 A decade of impact: Celebrating 10 years of cow-calf, swine education and research facilitates
[Page] 8 98-year-old donor keeps decades-long scholarship going in honor of late husband
[Page] 11 Looking back at Michele Dudash's tenure in academia
[Page] 12Giving students opportunities, experience to build their futures
[Page] 16 A Jackrabbit's journey in growing agricultural leadership
[Page] 18 Building South Dakota's next generation of rural veterinarians
[Page] 19 Conservation: A family affair
[Page] 20 South Dakota Water Resources Institute finds solutions to South Dakota's water challenges …

Lesson-1 On Mni Wiconi (Water Is Life): Understanding The Problem Of Water Contamination, Reycel Jugo, Madhav P. Nepal

iLEARN Teaching Resources

Students investigate a scenario of water contamination in a fictional community. They define the engineering problem of dirty water and explore the cultural and ecological significance of water through the lens of indigenous principles. This lesson introduces students to the concept of water contamination and the need for purification, grounding the learning in a real-world problem and connecting to Indigenous knowledge about the land and water.

Problem-Based Learning (PBL) Scenario: Students receive a letter from a fictional community whose water source has become cloudy and is making people sick. They are tasked with becoming “Water Engineers” to investigate the …

Lesson-2 On Mni Wiconi (Water Is Life): Designing And Testing Solutions (Water Filtration), Reycel Jugo, Madhav P. Nepal

iLEARN Teaching Resources

Students apply the engineering design process to build, test, and refine a simple water filter prototype. This hands-on experiential learning activity focuses on the properties of filtering materials and iterative problem-solving.  In this lesson, students will apply the engineering design process to build and test their own simple water filters. They will use their newfound knowledge to begin developing a practical solution to the problem presented in Lesson 1 - Mni Wiconi: A Water Engineering Challenge for 4th Graders.

Problem-Based Learning (PBL) Scenario: Having identified the problem, students are now tasked with designing and building a prototype water filter …

Developing Biodegradable Packaging Films And Beads From Agricultural Residues, Sandeep Paudel, Santosh Rijal, Srinivas Janaswamy, Madhav P. Nepal

iLEARN Teaching Resources

Agricultural waste is produced in large amounts worldwide. These are often discarded despite being valuable sources of cellulose and renewable, biodegradable products. At the same time, rising environmental concerns about petroleum-based plastic packaging have created demand for sustainable alternatives. Introducing K-12 students to biodegradable packaging materials developed from agricultural waste can enhance understanding of sustainability, basic materials science, and circular bioeconomy concepts while encouraging interest in STEM fields. Another concern is the presence of microplastics and nanoplastics in drinking water, which can pose serious risks to human health. Traditional coagulation agents, such as ferric and aluminum salts, are less effective …

Lesson-3 On Mni Wiconi (Water Is Life): Analyzing Evidence And Communicating Solutions (Community Stewardship), Reycel Jugo, Madhav P. Nepal

iLEARN Teaching Resources

Students analyze the data collected from their filter tests, construct an evidence-based argument for their most effective design, and communicate their solution to a “community council” (the class), connecting their technological solution back to community well-being. In the final lesson, students will analyze their data, draw conclusions, and communicate their findings. They will present their improved water filter designs to the class, acting as consultants for the fictional community.

Problem-Based Learning (PBL) Scenario: Students are now ready to present their final water filter prototypes and a summary of their findings to a “community council” (the rest of the class). They …

Lesson 1. Growing Food In Winter On Rosebud Reservation? Comparing Traditional Agriculture And Hydroponics, Jaysel Magno, Genesis Barbon, Madhav P. Nepal

iLEARN Teaching Resources

Students investigate how climate influences food production by comparing traditional agriculture and hydroponic growing systems. Through discussion, visual analysis, and comparative reasoning, students examine how environmental conditions such as frost, short growing seasons, and frozen soil affect agricultural productivity in cold climate regions. Students analyze the advantages and limitations of both traditional planting and hydroponics while exploring the relationship between food sovereignty, environmental adaptation, and community sustainability. This lesson serves as the foundation for a hydroponics unit and prepares students to understand how controlled-environment agriculture can support year-round food production.

Problem-Based Learning (PBL) Scenario: The local community experiences long winters, …

Lesson 2. Food Systems, Climate Risk, And Food Sovereignty, Jaysel Magno, Genesis Barbon, Madhav P. Nepal

iLEARN Teaching Resources

Students examine how food moves through a food system and investigate how climate disruptions can affect food access in rural and tribal communities. Through analysis of food supply chains, transportation networks, and weather-related challenges, students explore the concept of food sovereignty and its connection to community resilience. Students evaluate how hydroponics can reduce vulnerability within local food systems by increasing year-round food production and local control. This lesson builds upon students’ understanding of hydroponics from Lesson 1 and prepares them to view hydroponics as a community-based solution to environmental and food access challenges.

Problem-Based Learning (PBL) Scenario: A severe winter …

Lesson 3. Hydroponics System Implementation And Community Resilience, Jaysel Magno, Genesis Barbon, Madhav P. Nepal

iLEARN Teaching Resources

Students apply their understanding of climate limitations, food systems, and food sovereignty by launching and maintaining a 42-pod hydroponics system. Through hands-on participation, students learn the functions of hydroponic system components, establish maintenance procedures, and assume responsibility for long-term system management. This experiential learning lesson emphasizes community resilience, sustainability, self-determination, and practical problem-solving. Students connect scientific concepts to real-world community needs while recognizing hydroponics as a strategy for strengthening local food production and reducing food system vulnerability.

Problem-Based Learning (PBL) Scenario. The community faces long winters, transportation challenges, and limited opportunities for year-round food production. Students have learned that climate …

Food System Science Lesson-1 For First Graders. Makhá Waókiyapi: Soil Helpers, Feeding The Land That Feeds Us (Lesson About Regenerative Agriculture), Arlene A. Abao, Madhav P. Nepal

iLEARN Teaching Resources

In this engaging Grade 1 Science adventure, students become "Earth Doctors" as they discover that the soil beneath their feet is a living, breathing community! Guided by the Lakota value of Mitákuye Oyás’iŋ (all are related), children will learn that Makhá (the Earth) is not just "dirt," but a relative that provides us with everything we need to live. Students will get their hands dirty investigating the "Soil Helpers"—the worms, roots, and tiny bugs that work like a team to keep the land healthy. They will explore the three golden rules of being a good neighbor to the Earth: Compost …

Food System Science Lesson-2 For First Graders. Makhózula Etáŋhaŋ Wiyútapi Ke: From Planting To Eating, Arlene A. Abao, Madhav P. Nepal

iLEARN Teaching Resources

Feeding the Land That Feeds Us In this delicious adventure, kids will trace the journey of their food from the deep, dark soil all the way to their lunch forks! They will discover that the land is like a giant, magical kitchen called Makhózula, where plants cook up energy using sunlight and "vitamins" from the soil. Students will learn that when we eat a crunchy carrot or a sweet berry, we are actually tasting the strength of the Earth and the warmth of the sun. Through stories of Wopila (gratitude), they’ll see that the food system is a big, …

Food System Science Lesson-3 For First Graders. Mitakuye Oyasin: The Invisible Web (We Are All Related, An Ecological Knowledge Lesson), Arlene A. Abao, Madhav P. Nepal

iLEARN Teaching Resources

 In this heart-centered science lesson, students will discover the beautiful Lakota concept of Mitakuye Oyasin, which teaches us that "we are all related." Rather than seeing nature as a collection of separate things, children will learn to see the Invisible Web, the magical connections between the sun, soil, water, plants (flora), and animals (fauna). Through a hands-on "Yarn Web" activity and outdoor exploration, students will move beyond being just observers and start seeing themselves as stewards (caretakers) of their environment. They will learn that when we help a bee or protect a stream, we are helping our own Earth family. …

Lesson 1. Makhózula Etáŋhaŋ Wiyútapi Ke: Tomato Journey From Tiny Seed To My Plate, Rachel Pastrana, Madhav P. Nepal

iLEARN Teaching Resources

In this engaging kindergarten food systems lesson, students become “Plant Parents” as they follow the remarkable journey of a tomato from a tiny seed to food on their plate. Through storytelling, observation, movement, and hands-on plant care, students explore how sunlight, water, and soil work together to support plant growth. Using the Lakota concepts of Makhózula (Abundant Land), Wopila (Gratitude), and Mitákuye Oyás’iŋ (We Are All Related), students learn that food is a gift made possible by the cooperation of people, plants, animals, and natural resources. Students observe and care for tomato seedlings, participate in outdoor exploration activities, and create …

Lesson 2. The Soil Doctors: Healthy Vs. Thirsty Soil Detectives, Rachel Pastrana, Madhav P. Nepal

iLEARN Teaching Resources

In this lesson, Kindergarten students in Norris, South Dakota, become "Soil Detectives" to investigate the health of Maka (the Earth). By using their hands to touch, squeeze, and compare local schoolyard soil, students learn to identify Maka Wasté (Healthy Soil) and Maka Puza (Thirsty Soil). This lesson utilizes communal storytelling and Lakota terminology to ground scientific inquiry in local Indigenous knowledge and South Dakota land history. Students apply Regenerative Agriculture principles by providing a "cure" protecting the soil with a natural blanket—and conclude with a Wóglaka (Reflection Circle) to share their experiences as young stewards of the land.

Lesson 3. Sky Explorers: The Rhythm Of The Moon And My Garden, Rachel Pastrana, Madhav P. Nepal

iLEARN Teaching Resources

In this kindergarten lesson, students become "Sky Explorers" as they investigate the patterns and rhythms of the Sun, Moon, and Earth. Through storytelling, movement activities, Oreo Moon modeling, outdoor observations, and hands-on exploration, students learn how Earth's rotation creates day and night and how the Moon changes appearance through predictable phases. Students explore the Lakota concepts of Wí (Sun), Haŋwí (Moon), and Mitákuye Oyás'iŋ (We Are All Related) while making connections between natural cycles, food systems, and plant growth. Students discover how people have long observed the Moon as a natural calendar and how farmers and gardeners use seasonal patterns …

The Three Sisters And Soil Health (Lesson 1), Mara Johnson, Madhav P. Nepal, Jiyul Chang

iLEARN Teaching Resources

In this lesson, students will begin a week-long unit on soil health that is connected to the chapter The Three Sisters from the book Braiding Sweetgrass by Robin Wall Kimmerer. Students will begin the week by reading the chapter and answering discussion questions, and each subsequent day will build on this introduction with project-based learning activities. This module is designed to bridge traditional Indigenous knowledge with primary scientific inquiry, allowing students to explore soil nutrients, polycultures, and agricultural health in a way they can apply to their own lives and local food sovereignty efforts on the Rosebud Reservation.

Soil Nutrients And Composting (Lesson 3), Mara Johnson, Jiyul Chang, Madhav P. Nepal

iLEARN Teaching Resources

In this lesson, students investigate how nutrient cycling contributes to soil health and agricultural sustainability. Building upon previous lessons on the Three Sisters planting system and soil health analysis, students explore composting as a strategy for restoring nutrients in soils. Students learn the roles of carbon-rich "browns" and nitrogen-rich "greens" in decomposition and construct miniature composting systems using locally available organic materials. Through observation, data collection, and long-term monitoring, students analyze how microorganisms recycle nutrients and convert organic matter into fertile soil amendments. Students connect composting to traditional ecological knowledge, food sovereignty, environmental stewardship, and sustainable agriculture while evaluating how …

Soil Health Analysis (Lesson 2), Mara Johnson, Madhav P. Nepal, Jiyul Chang

iLEARN Teaching Resources

In this lesson, students will build on the previous lesson (reading and analyzing the Three Sisters chapter from Braiding Sweetgrass) by experimenting on soil in their schoolyard. Students will collect soil samples from multiple locations around their school grounds and evaluate soil texture, structure, infiltration, color, organic matter, and pH. Students Through field observations and laboratory analysis, students examine how soil characteristics influence plant growth and ecosystem health. Students connect modern soil science with Indigenous agricultural knowledge, particularly the Three Sisters planting system described in Braiding Sweetgrass by Robin Wall Kimmerer. By exploring how healthy soil supports sustainable agriculture, …

College Of Natural Sciences Spring Newsletter, College Of Natural Sciences

College of Natural Sciences Newsletters and Reports

[Page 1] Dean's Message
[Page] 2 Awards & Recognitions // Student Spotlights
[Page] 3 Zhang Named to Landsat Science Team // The Power of Teaching
[Page] 4 “Science as Art” Competition Welcomes High School Artists
[Page] 5 Testing for “Forever Chemicals” in Surface Water // New Faculty Spotlight
[Page] 6 Ambassador Initiated Outreach
[Page] 7 57th Annual Geography Convention
[Page] 8 Twice the Impact on On Call with the Prairie Doc
[Page] 9 Making Staple Foods Healthier // Halaweish & Cole-Dai Retire
[Page] 10 Drone Day 2026
[Page] 11 Student Research, Scholarship, and Creative Activity Day (SRSCAD)
[Page] 12 Ceremony …

Growing South Dakota (Spring 2026), College Of Agriculture, Food, And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 2 National heritage, statewide research, local impact
[Page] 7 About the South Dakota Agricultural Experiment Stations
[Page] 14 Managing the mooo-ment: How SDSU researchers are looking to improve cow health during the Transition Period
[Page] 18 Discovering strength in science: How education through undergraduate research prepares students for the future
[Page] 20 From India to Brookings: One grad student’s path to make a world of difference in virology
[Page] 22 Solving a billion-dollar problem: Identifying disease-resistent wheat genes
[Page] 24 Unlocking manure’s potential: SDSU leads multistate study on the power of swine manure in growing better crops
[Page] 28 …

College Of Natural Sciences 2025 Year-End Publication, College Of Natural Sciences

College of Natural Sciences Newsletters and Reports

Page 2 Dean's Message 
Page 3 Department Highlights 
Page 4 One Day for State 
Page 5 Ice cores reveal volcanic eruptions in 13th century 
Page 5 How do our cells interpret stress 
Page 6-7 Faculty Excellence
Page 8 New chemical biology consortium will accelerate cancer research
Page 9 SDSU to combat crop disease, biofilms in new NSF-back project 
Page 9 Science as Art Competition 
Page 10-11 Student Excellence  
Page 12 SDSU researcher developing natural alternative to synthetic dyes
Page 12 Browning Retired
Page 13 Quantum technologies through NSF-backed project
Page 13 NASA Funds CNS Development of Model
Page 14 GGS …

Genetic Determinants Associated With Persistence Of Listeria Species And Background Microflora From A Dairy Processing Environment, Vaishali Poswal, Sanjeev Anand, Jose L. Gonzalez-Hernandez, Brian Kraus

Dairy Science and Food Science Faculty Publications: 2022 to Present

Listeria monocytogenes is a persistent foodborne pathogen capable of surviving in food processing environments, often in association with diverse environmental microflora. This study examines genomic determinants of persistence, specifically stress adaptation and biofilm-associated traits, in environmental Listeria species and other environmental microflora from a dairy processing facility by analyzing whole-genome sequences of 6 environmental Listeria isolates, 4 ATCC reference strains, and 22 air and floor swab cultures, annotated using the RAST platform. Subsystem analysis revealed that Listeria isolates carried a defined set of genes linked to biofilm formation, antimicrobial resistance, and stress response, though in lower abundance than environmental cultures. …

Chemical Load: An Unseen Herbicide Filter In Restored Prairies?, Rylie Franklin

Electronic Theses and Dissertations

Community Assembly Theory is a framework used to describe the process by which species from a regional species pool disperse and encounter various abiotic and biotic conditions that act as filters, limiting which species will populate a specific local community. Prairie restoration success can be improved by understanding abiotic and biotic filters. As agricultural practices have adopted integrated weed management plans, that include the use of both chemical and non-chemical techniques, another filter needs to be considered during restoration: the chemical load of soils, i.e., herbicide residue from recent on-site applications and herbicide drift from adjacent areas. To examine the …

Impacts Of Management Practices And Soil Properties On Free-Living Nitrogen Fixation In Eastern South Dakota, Laura Galvan Nuevo

Electronic Theses and Dissertations

Free-living nitrogen (N) fixation (FLNF) may represent a sustainable pathway to supplement crop N demand in agroecosystems, yet edaphic and management factors regulating this process under field conditions remain poorly understood in the Northern Great Plains. Using 15N2 direct method to quantify potential FLNF (pFLNF) and baseline FLNF (bFLNF), this thesis investigates how crop rotations (2-, 3-, and 4-year systems), tillage management (conventional vs. no-till), cover cropping, and soil properties affect the potential of free-living diazotrophs to supply N via FLNF in a long-term no-till corn-based system in Southeastern South Dakota. A two-year field study evaluated pFLNF across four growing …

Growing South Dakota (Winter 2026), College Of Agriculture, Food And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 2 International Year of Rangelands and Pastoralists: South Dakota rangelands take center stage
[Page] 4 The professor and the soil
[Page] 8 Range ready: Helping students bridge the gap between conservation and agriculture
[Page] 9 Resilient rangelands: Native Plant Initiative’s role in reviving South Dakota’s prairies
[Page] 10 Jackrabbits lead the charge in bison research and education
[Page] 12 Agricultural and biosystems engineering celebrates century of education
[Page] 16 SDSU Quarter Scale Tractor Club: An impact beyond awards
[Page] 18 Building a legacy of opportunity: Karen D. Stuck Endowment strengthens agricultural communication program at South Dakota State University
[Page] …

Floodwater Salinity And Flood Duration Regulate Greenhouse Gas Production In High- Latitude Coastal Wetland And Tundra Soils, Mia J. Dicianna

Electronic Theses and Dissertations

Coastal high-latitude ecosystems are increasingly flooded from storm surges associated with climate change, exposing soils that were historically infrequently inundated to higher-salinity waters for longer durations. Sub-Arctic wetlands and tundra store large amounts of carbon, yet how flooding characteristics, particularly flood duration, influence microbial mineralization and, consequently, greenhouse gas (GHG) production in these soils remains poorly understood. We conducted a full-factorial microcosm incubation experiment in which coastal wetland and tundra soils were subjected to simulated flooding with three durations (1, 3, and 10 days) and four salinity treatments (unflooded, freshwater, 3 ppt, and 12 ppt) and measured carbon dioxide (CO2) …

An Integrated Evaluation Of Trace Mineral Status, Regional Variation, And Supplementation Effects On Circulating Mineral And Reproductive Performance In American Plains Bison, Bailey M. Rodriguez

Electronic Theses and Dissertations

The continued expansion of the American Plains Bison (Bison bison) industry has increased the need for science-based nutritional recommendations tailored specifically to the species, due to limited species-specific research. Because trace minerals influence immune function, growth, and reproductive performance, establishing baseline mineral status and evaluating responses to supplementation are critical for advancing bison production and conservation efforts. This thesis integrates two complementary investigations to evaluate trace mineral status in American Plains bison at both regional and herd management levels. First, a herd level comparison evaluated the influence of differing mineral supplementation strategies on circulating mineral concentrations, herd performance, and reproductive …

Winter-Feeding High Forage Vs. High Concentrate Diets To Beef Cows: Effects On Placental Transcriptomics, Lactation Capacity, And Enteric Methane Emissions, Megan Ann Wehrbein

Electronic Theses and Dissertations

Nutritional management and lactation performance are critical factors influencing productivity in cattle. This research includes two complementary studies. The first study was a meta-analysis to develop a lactation curve for Bos taurus cattle in North America using data from machine or hand milked cows. Data from 7 studies were used resulting in 1340 cow-day observations. Milk yield was analyzed by parity (primiparous or multiparous) and feeding management (non-nutrient restricted or nutrient restricted), revealing that primiparous cattle peaked earlier and at lower yields than multiparous cattle, and nutrient restriction reduced peak milk yield. Overall, Bos taurus cattle followed lactation trends similar …

Transcriptomic And Epigenetic Analysis Of Dormant Grape Buds During Chilling Fulfillment, Imasha Thilakarathna

Electronic Theses and Dissertations

No abstract provided.

Investigation Of Perennial Clover Living Mulch And Reduced Tillage Effects On Weed Suppression, Crop Metrics, And Yield Of Organic Cabbage And Sweet Corn In The Northern Great Plains, Kristina Harms

Electronic Theses and Dissertations

Vegetable farmers often face weed management and soil health challenges, such as nitrate leaching, soil compaction, and top-soil loss. Sustainable agriculture is a forefront of innovation compared to conventional agriculture. Living mulches, non-cash crops grown alongside cash crops, have demonstrated weed suppression and impact on the promotion of sustainable agriculture. Yet studies have not evaluated established living mulch systems on cash crop quality and yield. This study conducted in 2023, 2024, and 2025 at SDSU Southeast Research Farm, Beresford, SD, USA evaluates the impact of established ‘Dynamite’ red clover (Trifolium pratense), ‘Domino’ white clover (T. repens), and ‘Aberlasting’ white × …

Assessing The Impact Of Local–State Revenue Shares And Property Tax Structure On Effective Farmland Tax Rates: Panel Evidence From Seven Midwestern States, 2009–2022, Imtiaz Amin Chy

Electronic Theses and Dissertations

Property taxes are the primary revenue instrument of local governments in the United States, yet the burdens they impose are distributed unevenly. Farmland, because it cannot be relocated, often absorbs a disproportionate share. This paper examines two related questions: what fiscal factors determine how heavily agricultural land is taxed, and do those tax rates capitalize into farmland asset values? Using an annual panel of Iowa, Illinois, Indiana, Kansas, Minnesota, Nebraska, and Wisconsin from 2009 to 2022, we first document how each state allocates property tax revenue across four major spending categories (education, public welfare, health, and utilities) finding that all …