Digital Commons Network^™

Combatting Climate Change Through Conservation Easements, Claire Wright

Minnesota Journal of Law, Science & Technology

No abstract provided.

Regional Minimums In The U.S. Beef Complex, Elliott James Dennis, Bradley Lubben

Center for Agricultural Profitability

This report shows how the currently proposed policies differ; shows how these policies have aligned with historical market behavior; provides alternative specifications to regional minimums; and suggests policy alternatives to regional minimums.

The main purpose of this report is to show how current and potential alternative specifications of regional minimums would have historically aligned with observed market behavior. However, the fundamental question in the debate of the validity and effectiveness of regional minimums first rests on whether robust price discovery has historically occurred over time and within each USDA-AMS region. If there has been a lack of price discovery during …

The Casnr L.I.N.K.S. Newsletter: Learning Innovation Network For K-12 Schools, Edition 2, February 2022, Bailey Feit, Tammy Mittelstet

CASNR L.I.N.K.S. Newsletter

The purpose of this L.I.N.K.S. newsletter is to provide a monthly update of opportunities and resources for K-12 schools to connect with the University of Nebraska's CASNR Food, Energy, Water, and Societal Systems (FEWS²) programs and partners.

Included in this edition:

Classroom resources for all levels

Eye on new curriculum

Teacher opportunities

List of new partnerships

Ask an expert

Eye on CASR research: Travis Mulliniks

Student experiences

Send your students to campus

Success stories

Identifying Available Resources And Agricultural Practices Useful In Soil Fertility Management To Support Orange-Fleshed Sweet Potato Cultivation On Smallholder Farms In Mozambique, Rafaela Feola Conz, Engil Isadora Pujol Pereira, Abdul Naico, Maria Isabel Andrade, Johan Six

School of Earth, Environmental, & Marine Sciences Faculty Publications

Orange-fleshed sweet potato is an important source of macro-and micronutrients for humans, particularly in resource-poor rural communities. However, sweet potato cultivation removes large amounts of nutrients from the soil. Hence, soil fertility replenishment is vital to secure long-term food production. The lack of access to fertilizers hinders the ability of farmers to supply and replenish soil nutrients, intensifying food insecurity. This study aimed at identifying locally available organic residues and agricultural practices with potential application in soil fertility management to prevent soil degradation in southern Mozambique. We conducted a survey to gather information on the farmers’ demographics and farming systems …

Three Essays On Climate Smart Agriculture And Multidimensional Poverty In Uganda, Sarah Kagoya

LSU Doctoral Dissertations

Agriculture is the backbone of the Ugandan economy. It contributes about 23.1% to the gross domestic product and employs approximately 72% of the total labor force (World Bank, 2021). However, Uganda suffers from low agricultural productivity resulting from pests and diseases, changing climate, deteriorating natural resources, and lack of modern factors of production. In addition, land deterioration and fluctuating weather patterns lead to reduced crop productivity and cause food insecurity in the country. Climate-Smart Agriculture (CSA) can help transform the agricultural system and ensure food security in the country.

The dissertation is written in a three-essay format. The first essay …

Implementation Of Epigenetic Variation In Sorghum Selection And Implications For Crop Resilience Breeding, Dikungwa Ketumile, Xiaodong Yang, Robersy Sanchez, Hardik Kundariya, John F. Rajewski, Ismail M. Dweikat, Sally A. Mackenzie

Department of Agronomy and Horticulture: Faculty Publications

Crop resilience and yield stability are complex traits essential for food security. Sorghum bicolor is an important grain crop that shows promise for its natural resilience to drought and potential for marginal land production. We have developed sorghum lines in the Tx430 genetic background suppressed for MSH1 expression as a means of inducing de novo epigenetic variation, and have used these materials to evaluate changes in plant growth vigor. Plant crossing and selection in two distinct environments revealed features of phenotypic plasticity derived from MSH1 manipulation. Introduction of an epigenetic variation to an isogenic sorghum population, in the absence of …

The New Shiny Penny? Regenerative Agriculture Beliefs And Practices Among Portland's Urban Agriculturalists, Melia Ann Chase

Dissertations and Theses

Regenerative agriculture (RA) is a set of farming and land management practices intended to support or enhance soil health and carbon sequestration potential of soils while producing food, fiber, or other agricultural products. It has received broad acclaim from scholars, corporations, and governmental bodies as a potential means of sequestering carbon and mitigating climate change impacts. It has also received critique and pushback for its vague definition, shifting metrics, and lack of acknowledgement of the Indigenous practices underlying the modern suite of regenerative practices. The purpose of this research is to investigate the beliefs Portland, Oregon urban agricultural practitioners hold …

Drought Mitigation For Cow/Calf Producers: Depopulation Strategies, Reganne K. Briggs, Joshua Dallin, Jacob Hadfield, Matthew D. Garcia

All Current Publications

Drought is a recurring event faced by many cow/calf producers across the nation. As drought events increase in their severity, it is important for cattle producers to have a management plan to mitigate the economic effects of drought. Two of the most common strategies for mitigating the effects of drought include buying additional feed and depopulating a portion of the herd. This fact sheet reviews strategies that will guide the decision-making process to cull cattle during drought.

Tracking Spatial Regimes In Animal Communities: Implications For Resilience-Based Management, Caleb P. Roberts, Daniel R. Uden, Craig R. Allen, David G. Angeler, Larkin A. Powell, Brady W. Allred, Matthew O. Jones, Jeremy D. Maestas, Dirac L. Twidwell Jr

Department of Agronomy and Horticulture: Faculty Publications

Spatial regimes (the spatial extents of ecological states) exhibit strong spatiotemporal order as they expand or contract in response to retreating or encroaching adjacent spatial regimes (e.g., woody plant invasion of grasslands) and human management (e.g., fire treatments). New methods enable tracking spatial regime boundaries via vegetation landcover data, and this approach is being used for strategic management across biomes. A clear advancement would be incorporating animal community data to track spatial regime boundaries alongside vegetation data. In a 41,170-hectare grassland experiencing woody plant encroachment, we test the utility of using animal community data to track spatial regimes via two …

Water Use Characteristics Of Weeds: A Global Review, Best Practices, And Future Directions, Mandeep Singh, Meetpal Singh Kukal, Suat Irmak, Amit J. Jhala

Department of Agronomy and Horticulture: Faculty Publications

Weeds usually penalize crop yields by competing for resources, such as water, light, nutrients, and space. Most of the studies on the crop-weed competition domain are limited to assessing crop-yield losses due to weed pressure and other crop-weed interactions, overlooking the significant uptake of soil-water by weeds that exacerbates global water constraints and threatens the productivity and profitability. The objective of this review was to synthesize globally available quantitative data on weed water use (WU) sourced from 23 peer-reviewed publications (filtered from 233 publications via a multi-step protocol of inclusion criteria) with experimental investigations across space (3 continents), time (1927–2018), …

Reducing Tillage Affects Long-Term Yields But Not Grain Quality Of Maize, Soybeans, Oats, And Wheat Produced In Three Contrasting Farming Systems, Kirsten Ann Pearsons, Emmanuel Chiwo Omondi, Brad J. Heins, Gladis Zinati, Andrew Smith, Yichao Rui

Agricultural and Environmental Sciences Faculty Research

Reducing tillage has been widely promoted to reduce soil erosion, maintain soil health, and sustain long-term food production. The effects of reducing tillage on crop nutritional quality in organic and conventional systems, however, has not been widely explored. One possible driver of crop nutritional quality might be the changing soil nitrogen (N) availability associated with reduced tillage in various management systems. To test how reducing tillage affects crop nutritional quality under contrasting conventional and organic farming systems with varied N inputs, we measured nutritional quality (protein, fat, starch, ash, net energy, total digestible nutrients, and concentrations of Ca, K, Mg, …

Management-Intensive Grazing Impacts On Total Escherichia Coli, E. Coli O157: H7, And Antibiotic Resistance Genes In A Riparian Stream, Laura M. Rubeck, James E. Wells, Kathy Hanford, Lisa M. Durso, Walter H. Schacht, Elaine D. Berry

Department of Agronomy and Horticulture: Faculty Publications

The impacts of management-intensive grazing (MIG) of cattle on concentrations of total Escherichia coli, total suspended solids (TSS), and nitrate-nitrite nitrogen (NO₃+NO₂-N), and occurrence of E. coli O157:H7 and selected antibiotic resistance genes (ARGs) in stream water and/or sediments were evaluated. Cattle were grazed for twoweek periods in May in each of three years. Overall, grazing increased total E. coli in downstream water by 0.89 log10 MPN/100 mL (p < 0.0001), and downstream total E. coli concentrations were higher than upstream over all sampling intervals. Downstream TSS levels also increased (p ≤ 0.0294) during grazing. In contrast, there was …

Arkansas Bulletin Of Water Research - Issue 2021-2022, Erin Grantz, Lillie Haddock, Brian E. Haggard

Arkansas Bulletin of Water Research

The Arkansas Bulletin of Water Research (Bulletin) is a publication of the Arkansas Water Resources Center (AWRC). We publish the Bulletin to communicate the major findings of research funded by the Water Resources Research Act Section 104(b) in Arkansas. This research is relevant to Arkansas water stakeholders, and the Bulletin provides an easily searchable and aesthetically engaging access option.

This is the fourth publication of the Bulletin. This issue contains final reports from research projects that were funded by the 104(b) program in fiscal years 2019 and 2020. The articles in this issue can be cited as an AWRC publication. …

Cenchrus Setiger - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Birdwood grass (Cenchrus setiger). Birdwood grass (Cenchrus setiger) is native to north Africa, India and Middle east. It arrived in Western Australia (WA) when seed was sent from India in the 1920s by Field Marshal Lord Birdwood to his son-in-law, a grazier, in northern WA (Petheram and Kok 1991). It is a tufted, perennial bunch …

Stylosanthes Scabra - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Shrubby stylo (Stylosanthes scabra). Shrubby stylo (Stylosanthes scabra) is a shrubby, perennial legume, erect to suberect, with strong, woody stems, usually densely hairy and viscid, making them sticky under hot, dry conditions. It is a widespread and variable species, originating from South America and the Caribbean (Sousa Costa and Ferreira 1984) with two ecotypes identified …

Vicia Sativa - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Vetch, common vetch (Vicia sativa). Common vetch is a sprawling, climbing annual legume which has been grown in the Middle east and Europe since ancient times. It is a versatile legume for pasture, green manure, hay/silage and grain. Two subspecies are recognized: narrow-leaved vetch (Vicia sativa subsp. nigra) and common vetch (Vicia sativa subsp. sativa). …

Comparative Analysis Of Zoning Of Food Retail And Urban Agriculture For Richmond, Virginia, Hannah Quigley Mph, Meghan Dinofrio, Sarah Shaughnessy Mph, Aicp, John C. Jones Mpa, Phd

Environmental Studies Publications

This research partnership between local public health practitioners and urban food systems scholars suggests improvements to City of Richmond, Virginia’s zoning code related to food retail and urban agriculture by drawing inspiration from other American central cities. The authors created an empirical process to identify potential sister cities to Richmond as a source for high quality comparative examples. Next, the authors then engaged in a non-empirical, purposive process of identifying potential zoning code improvements from both identified sister cities, as well as other communities. Time and capacity constraints dictated the non-empirical nature of this search. Recommendations for improvement to Richmond’s …

Stylosanthes Hamata - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Caribbean stylo (Stylosanthes hamata). Caribbean stylo (Stylosanthes hamata) is an annual or short-lived perennial herbaceous legume. Individual plants behave as self-regenerating annuals or biennials. In the Northern Territory up to 40% of plants persist from one wet season to the next (Cameron 2010), but this varies depending on the length of the dry season. It …

Chloris Gayana - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Rhodes grass (Chloris gayana). Rhodes grass (Chloris gayana) is a warm season or sub-tropical (C4) perennial grass which is both tufted and has stolons (runners). The degree of stoloniferous growth not only varies between varieties but can also vary between different environments and management practices. Vegetative growth is generally 30 to 100 cm in height, …

Clitoria Ternatea - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Butterfly pea (Clitoria ternatea). Butterfly pea, also called blue pea, is a short-lived perennial legume with a semi-erect woody base with fine twining stems and pinnate leaves with 5–7 leaflets. Individual plants may persist for 2–4 years but, where well adapted, have good regeneration from seed, so reseeding is usually not required in permanent pastures. …

Secale Cereale - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Cereal rye (Secale cereale). Cereal rye (also called ryecorn, rye) is a minor cereal crop commonly grown on low fertility sandy soils and also for erosion control. Rye grain is refined into a flour and to make alcoholic drinks. It is also used for animal fodder. Cereal rye could be grown in northern Western Australia …

Zea Mays - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Maize (Zea mays). Maize (corn) is a tall, annual warm season (C4) grass grown for grain or silage. The first domestication of maize was by the indigenous people of southern Mexico, and it has been cultivated for thousands of years in central and southern America. Maize is a staple food in many parts of the …

Nebline, January/February 2022

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

2021 Extension Highlights

Your Trusted Educational Resource

4-H Programs Engaged 24,313 Youth

A New Year, A New You, A Renewed Community by Emily Gratopp

Garden Guide: Things to Do This Month

Extension’s 2022 Master Gardener Training, Two Sites Available

Upcoming Green Industry Conferences

ProHort Lawn & Landscape Update

2022 Pesticide Applicator Trainings

Crop Production Clinics In-Person and Zoom

Heart of 4-H Volunteer Award: Phil Wharton and Jenny DeBuhr

Watch Chicks Hatch on Egg Cam

4-H Rabbit Show, March 19

Dog Club Accepting New Members, Starts Jan. 10

4-H Club Gives Youth With Special Needs Opportunity to Show Lambs

4-H Announcements …

Soil Resilience And Arbuscular Mycorrhizal Fungi: How Fungi Can Inform Climate Change Mitigation And Adaptation In Maya Milpa Management, Courtney Mathers

Electronic Theses and Dissertations

In Mexico’s state of Yucatán, climate change impacts like prolonged and less predictable dry season length are manifesting as threats to agricultural production and food security. Nearly two thirds of Yucatán’s population is indigenous, many of whom live in rural communities that rely on rainfed subsistence agriculture (INEGI 2015). Ensuring sufficient food production in the face of climate change relies on the quality of agricultural soils. With both mismanagement of agricultural soils and climate change posing as threats to food production in Mexico, soil management practices that increase a soil quality should be identified and promoted. The primary objective of …

A Phytobacterial Tir Domain Effector Manipulates Nad+ To Promote Virulence, Samuel Eastman, Thomas Smith, Mark A. Zaydman, Panya Kim, Samuel Martinez, Neha Damaraju, Aaron Diantonio, Jeffrey Milbrandt, Thomas Clemente, James R. Alfano, Ming Guo

Department of Agronomy and Horticulture: Faculty Publications

The Pseudomonas syringae DC3000 type III effector HopAM1 suppresses plant immunity and contains a Toll/interleukin-1 receptor (TIR) domain homologous to immunity-related TIR domains of plant nucleotide-binding leucine-rich repeat receptors that hydrolyze nicotinamide adenine dinucleotide (NAD+) and activate immunity. In vitro and in vivo assays were conducted to determine if HopAM1 hydrolyzes NAD+ and if the activity is essential for HopAM1’s suppression of plant immunity and contribution to virulence. HPLC and LC-MS were utilized to analyze metabolites produced from NAD+ by HopAM1 in vitro and in both yeast and plants. Agrobacterium-mediated transient expression and in planta inoculation assays were performed to …

Drones In Agriculture, Jason P. De Koff, Priya Saini

Extension Publications

No abstract provided.

Cicer Arietinum - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Chickpeas (Cicer arietinum). Chickpeas are a widely cultivated annual pulse crop used for human consumption and as animal feed. They have been cultivated for thousands of years in the Middle East and most likely were first domesticated in what is now modern-day Turkey. There are two groups, the desi and kabuli types, which are differentiated …

Hordeum Vulgare - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an are a may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Barley (Hordeum vulgare). Barley is a major cereal grain grown in temperate climates globally. It was one of the first cultivated grains, particularly in Eurasia as early as 10,000 years ago. Barley has been used as animal fodder, as a source of fermentable material for beer and certain distilled beverages, and as a component …

Lupinus Angustifolius - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Narrowleaf lupins (Lupinus angustifolius). Narrowleaf lupins (white lupins, Australian sweet lupins) is an annual pulse crop first domesticated in Western Australia (WA). Farmers in WA produce about 80% of total world production and are the only significant exporters of lupin grain. Lupins are well suited to the deep, acid sandy soils that occur over large …

Stylosanthes Seabrana - Environmental Weed Risk Assessment 2022, Department Of Primary Industries And Regional Development, Western Australia

Environmental Weed Risk Assessments

Introducing new plants to an area may have both positive and negative effects on the environment, economy and community. To minimise the negative environmental impact of introducing new agricultural species, DPIRD conducts a risk assessment procedure based on widely accepted scientific standards. This report assesses Caatinga stylo (Stylosanthes seabrana). Stylosanthes seabrana is a perennial legume native to Bahia Region of Brazil. The common name ‘Caatinga’ is a type of subtropical vegetation (xeric shrubland and thorn forest), and an ecoregion characterized by this vegetation in interior north-eastern Brazil. Caatinga stylo is a short-lived perennial and generally lives between 2 to 4 …