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Do Cover Crops Pay? Net Returns To Corn/Soybean Farmers In Iowa, Alejandro Plastina 2019 Iowa State University

Do Cover Crops Pay? Net Returns To Corn/Soybean Farmers In Iowa, Alejandro Plastina

Alejandro Plastina

COVER CROPS, which are planted on approximately 700,000 of Iowa’s 30 million acres of farmland, have been found to have varying net returns based on several factors— cover c rop species, planting technique, termination method, tillage practices, following cash crop, and the farmer’s years of experience with cover crops.


Is Arc-Co Acting As A Safety Net Program? Evidence From Iowa, Alejandro Plastina, Chad Hart 2019 Iowa State University

Is Arc-Co Acting As A Safety Net Program? Evidence From Iowa, Alejandro Plastina, Chad Hart

Alejandro Plastina

THE AGRICULTURAL Act of 2014, referred to as the 2014 Farm Bill, is the legislative backbone of federal farm income support programs and agricultural disaster assistance programs. These programs, combined with federal crop insurance, are what is typically referred to as the farm safety net. As the debate has begun for the next version of the Farm Bill, policy discussions have centered on improving the effectiveness of the safety net. However, in previous Farm Bills, there had been a concerted effort to utilize decoupled agricultural support to ensure that US farm programs would meet World Trade Organization (WTO) standards. The ...


The Impact Of The 2018 Trade Disruptions On The Iowa Economy, Edward J. Balistreri, Chad E. Hart, Dermot J. Hayes, Minghao Li, Lee Schulz, David A. Swenson, Wendong Zhang, John M. Crespi 2019 Iowa State University

The Impact Of The 2018 Trade Disruptions On The Iowa Economy, Edward J. Balistreri, Chad E. Hart, Dermot J. Hayes, Minghao Li, Lee Schulz, David A. Swenson, Wendong Zhang, John M. Crespi

Lee Schulz

In this analysis, we use historical trade patterns, revenue linkages, and recent futures market price changes to discern the 2018 tariffs’ near-term impacts on the state of Iowa. We use two distinct modeling techniques, and in each technique we make two distinct assumptions. First, we use partial-equilibrium modeling approaches that do not directly consider linkages among the markets and industries across the state of Iowa. In these approaches, two assumptions about price changes are invoked—either the price changes are based upon supply and demand elasticities or the price changes are based upon observations in the futures market. The partial ...


The Power Law Distribution Of Cumulative Coal Production, Andrew Balthrop, Siyu Quan 2019 University of Arkansas, Fayetteville

The Power Law Distribution Of Cumulative Coal Production, Andrew Balthrop, Siyu Quan

Andrew Balthrop

The coal industry is dominated by the largest mines, with 1% of coal mines in the US being responsible for 65% of cumulative production. This provides evidence that cumulative coal production may be well approximated by a
power law, where the amount of production is inversely proportionate to the distributional rank. Maximum likelihood and regression-based procedures estimate the counter-cumulative power law parameter to be less than one,
indicating there is no well-defined mean or variance for cumulative production. Goodness of fit tests indicate the power-law is a better fit to the data than other competing one-parameter distributions. Additionally, the powerlaw ...


Snapshot And Trends In The Production And Overseas Trade Of Vegetables From Western Australia, Manju Radhakrishnan, Rohan Prince 2019 Department of Agriculture and Food, Western Australia

Snapshot And Trends In The Production And Overseas Trade Of Vegetables From Western Australia, Manju Radhakrishnan, Rohan Prince

Bulletins 4000 -

This publication provides a snapshot and trends in the production and overseas trade of vegetables from Western Australia.

WA’s total vegetable crop reached 328 857 tonnes in 2015–16, worth an estimated $490 million. This was a 33% increase in wholesale value from levels of 2011–12.

Quantity increased by 24% during the same period. Production and export of vegetables have experienced strong growth in Western Australia in recent years, predominantly driven by continued expansion of the local carrot sector. There have also been solid gains in the quantity of beans, broccoli, celery and mushrooms produced, underpinning a positive ...


Measuring Cocoa Agricultural Productivity: A Spatio-Temporal Econometric Approach, Yurlady Chaverra-Palacios 2019 The University of San Francisco

Measuring Cocoa Agricultural Productivity: A Spatio-Temporal Econometric Approach, Yurlady Chaverra-Palacios

Master's Theses

A significant increase of 50.5 percent in the national production of cocoa was registered between 2011 and 2015 in Colombia. Nevertheless, 5,890 tons were imported in 2015 to supply domestic demand. Unlike other crops, the production of cocoa has made a significant contribution to the income of approximately 38,000 families of which 90 percent are small farm-producers with very little capital. Facilitating credit for investment is one of the main strategies of the national government to increase cocoa productivity. Correspondingly, the impact of the credit for investment on the cocoa agricultural productivity and if those investments have ...


Sustainable Agriculture Lesson For Middle School Classrooms, Sara Colombe, Madhav P. Nepal, Jennifer McLaughlin, Matthew L. Miller, Larry B. Browning, P. Troy White 2019 Hoven High School, Hoven, South Dakota

Sustainable Agriculture Lesson For Middle School Classrooms, Sara Colombe, Madhav P. Nepal, Jennifer Mclaughlin, Matthew L. Miller, Larry B. Browning, P. Troy White

Madhav Nepal

In this lesson, students will learn about sustainability, where farmers/agriculturists can meet the needs of food, fiber, and fuel for the growing population. Students learn about growing population, its growth rate, major food source, sustainability barrel, potential ripple effects of positive impacts as well as the food waste and its effects.


Citizen Preferences For Marine Environmental Policy, Amy Bainbridge 2019 University of Maine

Citizen Preferences For Marine Environmental Policy, Amy Bainbridge

Electronic Theses and Dissertations

The growing global population, combined with increased land use, has emphasized the demand for sustainable ocean management strategies. Among suggestions for these strategies is a closer examination of the visual impact that aquaculture sites may have on coastal homes, as well as perception and preferences on coastal issues including coastal hazards, impacts of development, and marine debris. Maine’s unique and extensive history, as well as geographic location makes it an ideal setting to study these vital coastal issues, as well as to assist decision makers with informed options for management and policy.

This research explores various coastal usages and ...


Rational Ecosystem-Based Fisheries Management: An Application To The Gom Commercial Reef Fish Fishery, Quinn Weninger 2019 Iowa State University

Rational Ecosystem-Based Fisheries Management: An Application To The Gom Commercial Reef Fish Fishery, Quinn Weninger

Economics Working Papers

Ecosystem-based fisheries management (EBFM) seeks to integrate the full complexity of real-world marine ecosystems into the design of fisheries management policies and regulations. EBFM is practiced currently with the help of complex ecosystem process models that track and simulate numerous ecosystem elements/organisms across space and time. For simplicity and to maintain tractability, the fishing sector component of process models maintain restrictive assumptions for harvesting technologies, fishing behavior, regulations, and fishing sector response to changing stock conditions. Predictions of fishing sector-ecosystem interaction obtained under these assumptions can grossly misinform EBFM policy design. An alternative rational fishing model is presented and ...


The Effect Of Foreign Direct Investment On Food Security: A Case Study From Rural Mozambique, Kali Fleming 2019 University of Arkansas, Fayetteville

The Effect Of Foreign Direct Investment On Food Security: A Case Study From Rural Mozambique, Kali Fleming

Agricultural Economics and Agribusiness Undergraduate Honors Theses

Poverty and food insecurity in the sub-Saharan African region have been exacerbated by the worst drought in 23 years, which impacted 25 countries in Southern and Eastern Africa from 2015-2016. In Mozambique alone it was estimated that the 2015-2016 drought resulted in over 1.5 million people becoming food insecure (FAO, 2016). To mitigate the increasing problem of household food insecurity in sub-Saharan Africa, the World Food Program recommends job creation to target the most vulnerable populations. Job creation is often the result of Foreign Direct Investment (FDI). However, critics of FDI often cite concerns of human rights abuses, inadequate ...


The Value Of Farmland: Mapping Assessor Data To Understand Land Use Change, Lyndi Perry 2019 Utah State University

The Value Of Farmland: Mapping Assessor Data To Understand Land Use Change, Lyndi Perry

All Graduate Theses and Dissertations

Ideas developed by regional economists have potential applications within the urban planning field. One potential application is toward conserving farmland, and within this thesis this topic is examined for the study area of Utah County, Utah. Using assessor data, a land value map is created and further used to develop a regional economic model and spatial models that were analyzed for patterns of land use change.

Findings show that representing land value as continuous surface maps is a useful approach. The maps reveal that Utah County has densified as its population increased while farmland loss still occurred in agriculturally-important areas ...


Neonicotinoids In U.S. Maize: Insecticide Substitution Effects And Environmental Risk, Edward D. Perry, Giancarlo Moschini 2019 Kansas State University

Neonicotinoids In U.S. Maize: Insecticide Substitution Effects And Environmental Risk, Edward D. Perry, Giancarlo Moschini

CARD Working Papers

This study exploits a novel dataset containing more than 89,000 farm-level surveys over a 17-year period to investigate how neonicotinoid seed treatments in maize, now ubiquitous, have affected the use of other insecticides. Neonicotinoid insecticides are the most used class of insecticides in the world, but they are controversial because of their high toxicity to honeybees. In the United States, maize production accounts for the majority of neonicotinoid use, mostly as seed treatments. We find that neonicotinoids substituted for other major insecticides: plots planted with neonicotinoid- treated seeds were 52% and 47% less likely to be treated with a ...


Adoption Of Secure Pork Supply Plan Biosecurity By U.S. Swine Producers, Christopher C. Pudenz, Lee L. Schulz, Glynn T. Tonsor 2019 Iowa State University

Adoption Of Secure Pork Supply Plan Biosecurity By U.S. Swine Producers, Christopher C. Pudenz, Lee L. Schulz, Glynn T. Tonsor

Economics Publications

There is mounting concern about the negative animal health and supply chain consequences of animal disease outbreaks in the United States. Recent disease outbreaks have drawn attention to the need for additional understanding of biosecurity efforts to reduce disease frequency, spread, and impact. Biosecurity is a key component of the Secure Pork Supply (SPS) Plan designed to provide business continuity in the event of a foreign animal disease outbreak as well as help protect operations from endemic diseases. Core biosecurity recommendations outlined in the SPS Plan are a written site-specific biosecurity plan and implementation of a perimeter buffer area and ...


Evaluating The Performance Of A Relative Humidity-Based Warning System For Sooty Blotch And Flyspeck In Iowa, Hafizi Bin Rosli, Derrick A. Mayfield, Jean C. Batzer, Philip M. Dixon, Wendong Zhang, Mark L. Gleason 2019 Iowa State University

Evaluating The Performance Of A Relative Humidity-Based Warning System For Sooty Blotch And Flyspeck In Iowa, Hafizi Bin Rosli, Derrick A. Mayfield, Jean C. Batzer, Philip M. Dixon, Wendong Zhang, Mark L. Gleason

Philip Dixon

A warning system for the sooty blotch and flyspeck (SBFS) fungal disease complex of apple, developed originally for use in the southeastern United States, was modified to provide more reliable assessment of SBFS risk in Iowa. Modeling results based on previous research in Iowa and Wisconsin had suggested replacing leaf wetness duration with cumulative hours of relative humidity (RH) >=97%as the weather input to the SBFS warning system. The purpose of the present study was to evaluate the performance of a RH based SBFS warning system, and to assess the potential economic benefits for its use in Iowa. The ...


Biotechnology And Pest Resistance: An Economic Assessment Of Refuges, Terrance M. Hurley, Bruce A. Babcock, Richard L. Hellmich 2019 Iowa State University

Biotechnology And Pest Resistance: An Economic Assessment Of Refuges, Terrance M. Hurley, Bruce A. Babcock, Richard L. Hellmich

Richard L Hellmich

Biologists now engineer transgenic crop varieties that offer farmers a new tool for effectively managing pests. Concern over pest resistance, however, has prompted the Environmental Protection Agency to require resistance management plans. This paper develops an economic model of pest management with pest resistance to estimate the constant proportion of cropland planted in refuge that maximizes farm income over a fixed planning horizon. Results indicate a clear economic tradeoff between the pest control benefits of a transgenic variety and the resistance management benefits afforded by refuge.


The Montana Energy Security Act, Kennedy Bahm 2019 Carroll College

The Montana Energy Security Act, Kennedy Bahm

Carroll College Student Undergraduate Research Festival

Eliminating the use of coal-fired power nationwide has been a popular talking point in recent legislative debates in Washington, D.C. Despite obvious threats to the environment, investing in coal-fired energy offers considerable economic benefits to Americans. In Montana, this debate has been centered around the closure of the Colstrip Power Plant. The Montana Energy Security Act (HB 203), proposed by Representative Rodney Garcia, would permit the state of Montana to sell bonds to finance the $500m purchase of the Colstrip Power Plant. This case study offers a cost benefit analysis of the Montana Energy Security Act, comparing the societal ...


The Development Of The Infews-Er: A Virtual Resource Center For Transdisciplinary Graduate Student Training At The Nexus Of Food, Energy, And Water, Luis F. Rodríguez, Anna-Maria Marshall, Dan Cotton, Richard Koelsch, Jacek A. Koziel, Deanne Meyer, Dan Steward, Jill Heemstra, Anand Padmanabahn, John Classen, Nathan J. Meyer, Benjamin L. Ruddell, Sean M. Ryan, Ximing Cai, Emad Habib, Peter D. Saundry 2019 University of Illinois at Urbana-Champaign

The Development Of The Infews-Er: A Virtual Resource Center For Transdisciplinary Graduate Student Training At The Nexus Of Food, Energy, And Water, Luis F. Rodríguez, Anna-Maria Marshall, Dan Cotton, Richard Koelsch, Jacek A. Koziel, Deanne Meyer, Dan Steward, Jill Heemstra, Anand Padmanabahn, John Classen, Nathan J. Meyer, Benjamin L. Ruddell, Sean M. Ryan, Ximing Cai, Emad Habib, Peter D. Saundry

Agricultural and Biosystems Engineering Publications

Problems at the nexus of Food, Energy and Water Systems (FEWS) are among the most complex challenges we face. Spanning simple to complex temporal, geographic, social, and political framings, the questions raised at this nexus require multidisciplinary if not transdisciplinary approaches. Answers to these questions must draw from engineering, the physical and biological sciences, and the social sciences. Practical solutions depend upon a wide community of stakeholders, including industry, policymakers, and the general public. Yet there are many obstacles to working in a transdisciplinary environment: unfamiliar concepts, specialized terminology, and countless “blind” spots. Graduate education occurs in disciplinary ‘silos', often ...


British Government Information Resources, Bert Chapman 2019 Purdue University

British Government Information Resources, Bert Chapman

Libraries Faculty and Staff Creative Materials

Provides an overview of British Government information resources. Contents include basic British economic and political background and information from British Government websites including the Department of Environment, Food, and Rural Affairs (DEFRA), Brexit related material produced by British government agencies such as the Department for Exiting the European Union,, the Ministry of Defence, the National Museum of the Royal Navy, the Home Office Visas and Immigration Section, the Office of National Statistics, Her Majesty's Treasury, the British Parliament including parliamentary committees and research agencies, the website of Member of Parliament (MP) Jacob Rees-Mogg (Conservative-North East Somerset), a webcast of ...


The Impact Of The 2018 Trade Disruptions On The Iowa Economy, Edward J. Balistreri, Chad E. Hart, Dermot J. Hayes, Minghao Li, Lee Schulz, David A. Swenson, Wendong Zhang, John M. Crespi 2019 Iowa State University

The Impact Of The 2018 Trade Disruptions On The Iowa Economy, Edward J. Balistreri, Chad E. Hart, Dermot J. Hayes, Minghao Li, Lee Schulz, David A. Swenson, Wendong Zhang, John M. Crespi

John Crespi

In this analysis, we use historical trade patterns, revenue linkages, and recent futures market price changes to discern the 2018 tariffs’ near-term impacts on the state of Iowa. We use two distinct modeling techniques, and in each technique we make two distinct assumptions. First, we use partial-equilibrium modeling approaches that do not directly consider linkages among the markets and industries across the state of Iowa. In these approaches, two assumptions about price changes are invoked—either the price changes are based upon supply and demand elasticities or the price changes are based upon observations in the futures market. The partial ...


Has Specialization Put A Limit On How Far Cattle Contracting Can Go?, John Crespi, Tina L. Saitone 2019 University of California - Davis

Has Specialization Put A Limit On How Far Cattle Contracting Can Go?, John Crespi, Tina L. Saitone

John Crespi

I N 1776 Scottish philosopher Adam Smith published An Inquiry into the Nature and Causes of the Wealth of Nations, or as it is better known, The Wealth of Nations. In many mundane ways, Smith merely chronicled the burgeoning European industries he was observing; but, in doing so, he helped spread a revolutionary thinking about how factories could take advantage of specialization. Smith’s discussion of a visit to a pin factory has been re-told so often that many people probably know the story without knowing the source. The story goes like this: If you were to make a pin ...


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