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- United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications (2)
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Articles 1 - 14 of 14
Full-Text Articles in Life Sciences
Conservation Agriculture And Cover Crop Adoption By Smallholder Farmers In Cambodia: Understanding Perceptions, Challenges, And Opportunities For Soil Improvement, Presley Nickens, David R. Ader, Max C. Miller, Ii, Pao Srean, Tom Gill, Sovanneary Huot
Conservation Agriculture And Cover Crop Adoption By Smallholder Farmers In Cambodia: Understanding Perceptions, Challenges, And Opportunities For Soil Improvement, Presley Nickens, David R. Ader, Max C. Miller, Ii, Pao Srean, Tom Gill, Sovanneary Huot
Agricultural and Environmental Sciences Faculty Research
Practical solutions for soil conservation are needed to ensure sustainable food production. Conservation agriculture and the use of cover crops are promising strategies for soil improvement in agricultural systems. These strategies are being promoted in Cambodia to address rapidly declining soil fertility; however, there is a lack of insight into the perceptions of Cambodian smallholders towards cover cropping within a conservation agriculture approach. A greater understanding of the utilization and perceptions of cover crops is needed to increase adoption and prevent further soil degradation. This study utilized a mixed methods approach with quantitative data from a farmer survey and qualitative …
Allelopathy Of Faba Bean Cover Crop To Durum Wheat Under A Semi-Arid Environment, Oussama Oueslati, Arwa Zammali, Raed Hamdi, Ahlem Dhahri, Chaima Melliti, Moncef Ben Hammouda, Robert Kremer
Allelopathy Of Faba Bean Cover Crop To Durum Wheat Under A Semi-Arid Environment, Oussama Oueslati, Arwa Zammali, Raed Hamdi, Ahlem Dhahri, Chaima Melliti, Moncef Ben Hammouda, Robert Kremer
The Philippine Agricultural Scientist
Problems facing farmers practicing conservation agriculture in the semi-arid zone of Tunisia include appropriate cover crop selection, management of allelopathic effects affecting subsequent crop performance, and influence of seasonal variation on allelopathy expression. Allelopathy expressed by faba bean (Vicia faba L.) toward durum wheat [Triticum turgidum ssp. durum (Desf.) Husn.] was studied using bioassays during three growing seasons. The role of phenols in the expression of such potential was also investigated. Analyses of plant samples at three phenological stages (flowering, fruiting, senescence) revealed that leaves were most inhibitory. Allelopathic potential differed among plant components and phenological stages, with …
Assessing Consumer Demand, Producer Profitability, And The Environmental Impacts Of Conservation Agriculture Adoption In Sub-Saharan Africa, Willy Byamungu Mulimbi
Assessing Consumer Demand, Producer Profitability, And The Environmental Impacts Of Conservation Agriculture Adoption In Sub-Saharan Africa, Willy Byamungu Mulimbi
Graduate Theses and Dissertations
This dissertation explores three aspects of conservation agriculture (CA) in the Sub-Saharan African region (SSA). The first article examines the demand side of CA and explores whether urban maize (Zea mays L.) consumers in the Democratic Republic of the Congo (DRC) would be willing to pay a premium for CA-produced maize flour. The second article estimates the effects CA provides to adopters and their farms in smallholder farming systems in the DRC, focusing on changes in soil properties and cowpea (Vigna unguiculata) yields. The final article uses a Life Cycle Assessment (LCA) approach to monetize the environmental impacts of adopting …
Evaluating Soil Health Changes Following Cover Crop And No-Till Integration Into A Soybean (Glycine Max) Cropping System In The Mississippi Alluvial Valley, Alexandra Gwin Firth
Evaluating Soil Health Changes Following Cover Crop And No-Till Integration Into A Soybean (Glycine Max) Cropping System In The Mississippi Alluvial Valley, Alexandra Gwin Firth
Theses and Dissertations
The transition of natural landscapes to intensive agricultural uses has resulted in severe loss of soil organic carbon (SOC), increased CO₂ emissions, river depletion, and groundwater overdraft. Despite negative documented effects of agricultural land use (i.e., soil erosion, nutrient runoff) on critical natural resources (i.e., water, soil), food production must increase to meet the demands of a rising human population. Given the environmental and agricultural productivity concerns of intensely managed soils, it is critical to implement conservation practices that mitigate the negative effects of crop production and enhance environmental integrity. In the Mississippi Alluvial Valley (MAV) region of Mississippi, USA, …
Do Long-Term Conservation Pasture Management Practices Influence Microbial Diversity And Antimicrobial Resistant Genes In Runoff?, Yichao Yang, Amanda J. Ashworth, Lisa M. Durso, Mary Savin, Jennifer M. Debruyn, Kimberly Cook, Philip A. Moore Jr, Philip R. Owens
Do Long-Term Conservation Pasture Management Practices Influence Microbial Diversity And Antimicrobial Resistant Genes In Runoff?, Yichao Yang, Amanda J. Ashworth, Lisa M. Durso, Mary Savin, Jennifer M. Debruyn, Kimberly Cook, Philip A. Moore Jr, Philip R. Owens
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Runoff from land-applied manure and poultry litter is one mechanism by which manure-borne bacteria are transported over large distances in the environment. There is a global concern that antimicrobial resistant (AMR) genes may be transmitted through the food chain from animal manures to soil to surface water. However, details are lacking on the ecology of AMR genes in water runoff as well as how conservation management practices may affect the runoff microbiome or minimize the movement of AMR genes. The aim of this study was to identify microbial community structure and diversity in water runoff following 14-years of poultry litter …
Soil Health Management Enhances Microbial Nitrogen Cycling Capacity And Activity, Jianlin Hu, Virginia L. Jin, Julie Y.M. Konkel, Sean M. Schaeffer, Liesel G. Schneider, Jennifer M. Debruyn
Soil Health Management Enhances Microbial Nitrogen Cycling Capacity And Activity, Jianlin Hu, Virginia L. Jin, Julie Y.M. Konkel, Sean M. Schaeffer, Liesel G. Schneider, Jennifer M. Debruyn
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Soil microbial transformations of nitrogen (N) can be affected by soil health management practices. Here, we report in situ seasonal dynamics of the population size (gene copy abundances) and functional activity (transcript copy abundances) of five bacterial genes involved in soil N cycling (ammonia-oxidizing bacteria [AOB] amoA, nifH, nirK, nirS, and nosZ) in a long-term continuous cotton production system under different management practices (cover crops, tillage, and inorganic N fertilization). Hairy vetch (Vicia villosa Roth), a leguminous cover crop, most effectively promoted the expression of N cycle genes, which persisted after cover crop termination throughout the growing season. Moreover, we …
Assessment Of Cover Crop Management Strategies In Nebraska, Us, Maxwel C. Oliveira, Liberty Butts, Rodrigo Werle
Assessment Of Cover Crop Management Strategies In Nebraska, Us, Maxwel C. Oliveira, Liberty Butts, Rodrigo Werle
West Central Research and Extension Center, North Platte
Adoption of cover crops has the potential to increase agricultural sustainability in the US and beyond. In 2017, a survey was conducted with Nebraska stakeholders in an attempt to evaluate current cover crop management strategies adopted in soybean (Glycine max [L.] Merr.), field corn (Zea mays L.), and seed corn production. Eighty-two Nebraska stakeholders answered the survey, of which 80% identified themselves as growers. Eighty-seven percent of respondents manage cover crops, and the average cover crop ha planted on a per farm basis is 32%. The primary method of establishing cover crops following soybeans and field corn is …
Ecological And Economic Benefits Of Integrating Sheep Into Viticulture Production, Meredith T. Niles, Rachael Garrett, Drew Walsh
Ecological And Economic Benefits Of Integrating Sheep Into Viticulture Production, Meredith T. Niles, Rachael Garrett, Drew Walsh
College of Agriculture and Life Sciences Faculty Publications
The integration of crop and livestock systems has been recognized for its potential to reduce the environmental impacts associated with agriculture and improve farmer livelihoods. However, to date, most research has focused on the integration of cattle into crop and pasture systems. Here we examine the integration of sheep into vineyards and assess farmers’ perceived benefits and costs of the practice. Viticulture expansion has led to significant land use change in recent years and new environmental challenges, particularly with respect to herbicide use. Sheep integration into vineyards offers the potential to utilize the synergies of both systems to reduce external …
Cover Crops And Fertilization Alter Nitrogen Loss In Organic And Conventional Conservation Agriculture Systems, Rebecca E. Shelton, Krista L. Jacobsen, Rebecca L. Mcculley
Cover Crops And Fertilization Alter Nitrogen Loss In Organic And Conventional Conservation Agriculture Systems, Rebecca E. Shelton, Krista L. Jacobsen, Rebecca L. Mcculley
Horticulture Faculty Publications
Agroecosystem nitrogen (N) loss produces greenhouse gases, induces eutrophication, and is costly for farmers; therefore, conservation agricultural management practices aimed at reducing N loss are increasingly adopted. However, the ecosystem consequences of these practices have not been well-studied. We quantified N loss via leaching, NH3 volatilization, N2O emissions, and N retention in plant and soil pools of corn conservation agroecosystems in Kentucky, USA. Three systems were evaluated: (1) an unfertilized, organic system with cover crops hairy vetch (Vicia villosa), winter wheat (Triticum aestivum), or a mix of the two (bi-culture); (2) an organic …
Is Conservation Agriculture A Potential Option For Cereal-Based Sustainable Farming System In The Eastern Indo-Gangetic Plains Of Nepal?, Dipendra Pokharel, Raj Kant Jha, Thakur Prasad Tiwari, Mahesh Kumar Gathala, Hari Krishna Shrestha, Dinesh Panday
Is Conservation Agriculture A Potential Option For Cereal-Based Sustainable Farming System In The Eastern Indo-Gangetic Plains Of Nepal?, Dipendra Pokharel, Raj Kant Jha, Thakur Prasad Tiwari, Mahesh Kumar Gathala, Hari Krishna Shrestha, Dinesh Panday
Department of Agronomy and Horticulture: Faculty Publications
A decline in land and water productivity, increase in the cost of cultivation, and labor-intensive practices are affecting the cereal-based farming system in Nepal, particularly in the Indo-Gangetic Plains (IGP). Conservation agriculture (CA) practices have been found to be the climate-, energy-, and labor-smart and sustainable agricultural production technologies. Sustainable and Resilient Farming System Intensification (SRFSI) has been working since 2014 in response to the sustainability of the cereal-based (rice–wheat and rice–maize) farming in Sunsari and Dhanusha districts of Nepal. This study was conducted to assess the adoption and scaling up of CA in addition to input usage, production, net …
Adoption Of Conservation Practices And Precision Technologies In South Dakota: An Empirical Analysis, Allen P. Deutz
Adoption Of Conservation Practices And Precision Technologies In South Dakota: An Empirical Analysis, Allen P. Deutz
Electronic Theses and Dissertations
Advances in conservation agriculture and precision agriculture technology practices have contributed to the adoption of conservation practices that reduce externalities from agricultural production, but this conversion was usually coupled with economic incentive, whether from increases in fertility and yield, or payments for on farm retirement or restoration practices. This study expands on this theme, evaluating the connection between conservation and the increased use of various precision agriculture technologies. The study uses survey data collected from South Dakota farmers and ranchers, with responses from 28 counties and over 500,000 acres of crop, pasture, and range land to address the following three …
Conservation Agriculture: Gendered Impacts On Households' Livelihoods, Olipa Zulu-Mbata, Antony Chapoto
Conservation Agriculture: Gendered Impacts On Households' Livelihoods, Olipa Zulu-Mbata, Antony Chapoto
Zambia Social Science Journal
In response to climate change, new technologies resilient to climatic variability have been promoted among smallholder farmers. Conservation Agriculture (CA) has been promoted since the 1990s in sub-Saharan Africa. However, as with any new technology, various factors affect adoption and ultimately the impact of the technology. Gender is one such factor. Both female and male smallholder farmers are faced with numerous constraints to accessing productive resources. Female farmers face more problems in adopting new technology than do male farmers, resulting in few of them adopting them. This in turn reduces the impact that these technologies have on their livelihood. Using …
A Short-Term Assessment Of Carbon Dioxide Fluxes Under Contrasting Agricultural And Soil Management Practices In Zimbabwe, Deb O'Dell, Thomas J. Sauer, Bruce B. Hicks, Christian Thierfelder, Dayton M. Lambert, Joanne Logan, Neal S. Eash
A Short-Term Assessment Of Carbon Dioxide Fluxes Under Contrasting Agricultural And Soil Management Practices In Zimbabwe, Deb O'Dell, Thomas J. Sauer, Bruce B. Hicks, Christian Thierfelder, Dayton M. Lambert, Joanne Logan, Neal S. Eash
Biosystems Engineering and Soil Science Publications and Other Works
Two of the biggest problems facing humankind are feeding an exponentially growing human population and preventing the accumulation of atmospheric greenhouse gases and its climate change consequences. Refined agricultural practices could address both of these problems. The research addressed here is an exploration of the efficacy of alternative agricultural practices in sequestering carbon (C). The study was conducted in Zimbabwe with the intent to (a) demonstrate the utility of micrometeorological methods for measuring carbon dioxide (CO2) exchange between the surface and the atmosphere in the short-term, and (b) to quantify differences in such exchange rates for a variety of agricultural …
Conservation Agriculture In Kentucky: Investigating Nitrogen Loss And Dynamics In Corn Systems Following Wheat And Hairy Vetch Cover Crops, Rebecca Erin Shelton
Conservation Agriculture In Kentucky: Investigating Nitrogen Loss And Dynamics In Corn Systems Following Wheat And Hairy Vetch Cover Crops, Rebecca Erin Shelton
Theses and Dissertations--Plant and Soil Sciences
Unintentional nitrogen (N) loss from agroecosystems produces greenhouse gases, induces eutrophication, and is costly for farmers; therefore, adoption of conservation agricultural management practices, such as no-till and cover cropping, has increased. This study assessed N loss via leaching, NH3 volatilization, N2O emissions, and N retention in plant and soil pools of corn conservation agroecosystems across a year. Three systems were evaluated: 1) an unfertilized organic system with cover crops Vicia villosa, Triticum aestivum, or a mix of the two; 2) an organic system with a Vicia cover crop employing three fertilization schemes (0 N, organic N, …