scholarly journals Northwestward Cropland Expansion and Growing Urea-Based Fertilizer Use Enhanced NH<sub>3</sub> Emission Loss in the Contiguous United States

2020 ◽  
Author(s):  
Peiyu Cao ◽  
Chaoqun Lu ◽  
Jien Zhang ◽  
Avani Khadilkar
Keyword(s):  
United States ◽  
The United States ◽  
N Fertilizer ◽  
Spatiotemporal Patterns ◽  
Fertilizer Management ◽  
Fertilizer Use ◽  
Nh3 Emission ◽  
The U.S

Abstract. The increasing demands of food and biofuel have promoted century-long cropland expansion and nitrogen (N) fertilizer enrichment in the United States. However, the role of such long-term human activities in influencing the spatiotemporal patterns of Ammonia (NH3) emission remains poorly understood. Based on an empirical model including climate, soil properties, N fertilizer management, and cropland distribution history, we have quantified monthly fertilizer-induced NH3 emission across the contiguous U.S. from 1900 to 2015. Our results show that N fertilizer-induced NH3 emission in the U.S. has increased from

scholarly journals Northwestward cropland expansion and growing urea-based fertilizer use enhanced NH<sub>3</sub> emission loss in the contiguous United States

2020 ◽  
Vol 20 (20) ◽  
pp. 11907-11922
Author(s):  
Peiyu Cao ◽  
Chaoqun Lu ◽  
Jien Zhang ◽  
Avani Khadilkar
Keyword(s):  
United States ◽  
Great Plains ◽  
Spring Wheat ◽  
The United States ◽  
N Fertilizer ◽  
Northern Great Plains ◽  
Fertilizer Use ◽  
Nh3 Emission ◽  
The Us ◽  
The 1960S

Abstract. The increasing demands of food and biofuel have promoted cropland expansion and nitrogen (N) fertilizer enrichment in the United States over the past century. However, the role of such long-term human activities in influencing the spatiotemporal patterns of ammonia (NH3) emission remains poorly understood. Based on an empirical model and time-series gridded datasets including temperature, soil properties, N fertilizer management, and cropland distribution history, we have quantified monthly fertilizer-induced NH3 emission across the contiguous US from 1900 to 2015. Our results show that N-fertilizer-induced NH3 emission in the US has increased from <50 Gg N yr−1 before the 1960s to 641 Gg N yr−1 in 2015, for which corn and spring wheat are the dominant contributors. Meanwhile, urea-based fertilizers gradually grew to the largest NH3 emitter and accounted for 78 % of the total increase during 1960–2015. The factorial contribution analysis indicates that the rising N fertilizer use rate dominated the NH3 emission increase since 1960, whereas the impacts of temperature, cropland distribution and rotation, and N fertilizer type varied among regions and over periods. Geospatial analysis reveals that the hot spots of NH3 emissions have shifted from the central US to the Northern Great Plains from 1960 to 2015. The increasing NH3 emissions in the Northern Great Plains have been found to closely correlate to the elevated NH4+ deposition in this region over the last 3 decades. This study shows that April, May, and June account for the majority of NH3 emission in a year. Interestingly, the peak emission month has shifted from May to April since the 1960s. Our results imply that the northwestward corn and spring wheat expansion and growing urea-based fertilizer uses have dramatically altered the spatial pattern and temporal dynamics of NH3 emission, impacting air pollution and public health in the US.

The Artist as Environmentalist: Ansel Adams, Policy Entrepreneurship, and the Growth of Environmentalism

Public Voices ◽  
2017 ◽  
Vol 9 (2) ◽  
pp. 9
Author(s):  
John C. Morris
Keyword(s):  
United States ◽  
Policy Process ◽  
The United States ◽  
Policy Entrepreneur ◽  
Policy Entrepreneurship ◽  
Ansel Adams

The role of the policy entrepreneur in the policy process forms an integral part of our understanding of the formulation and implementation of policy in the United States. For all its theoretical importance, however, little work has been done to develop or test the propositions of entrepreneurship offered by Kingdon (1984). By examining the life of Ansel Adams (1902-1984), this paper explores more fully the concept of policy entrepreneurship and seeks to develop a more robust concept that accounts for the long-term, diffuse series of activities that precede Kingdon’s “stream coupling” in the policy process. The analysis suggests that such an approach offers some promise for capturing a broader spectrum of policy activity.

THE INFLUENCE OF SCOTTISH ACCOUNTANTS IN THE UNITED STATES: THE EARLY CASE OF THE SOCIETY OF ACCOUNTANTS IN EDINBURGH

1997 ◽  
Vol 24 (1) ◽  
pp. 117-141 ◽  
Author(s):  
T. A. LEE
Keyword(s):  
United States ◽  
General Theory ◽  
Research Program ◽  
The United States ◽  
The World ◽  
Early Case ◽  
The Impact ◽  
Chartered Accountants ◽  
The U.S

This study represents part of a long-term research program to investigate the influence of U.K. accountants on the development of professional accountancy in other parts of the world. It examines the impact of a small group of Scottish chartered accountants who emigrated to the U.S. in the late 1800s and early 1900s. Set against a general theory of emigration, the study's main results reveal the significant involvement of this group in the founding and development of U.S. accountancy. The influence is predominantly with respect to public accountancy and its main institutional organizations. Several of the individuals achieved considerable eminence in U.S. public accountancy.

Univision, Telemundo, and the Rise of Spanish-Language Television in the United States

2020 ◽  
Author(s):  
Craig Allen
Keyword(s):  
United States ◽  
Mass Communication ◽  
The United States ◽  
Spanish Language ◽  
Spanish Speaking ◽  
History Of ◽  
English Speaking ◽  
American Society ◽  
The U.S

The first completely researched history of U.S. Spanish-language television traces the rise of two foremost, if widely unrecognized, modern American enterprises—the Spanish-language networks Univision and Telemundo. It is a standard scholarly history constructed from archives, original interviews, reportage, and other public materials. Occasioned by the public’s wakening to a “Latinization” of the U.S., the book demonstrates that the emergence of Spanish-language television as a force in mass communication is essential to understanding the increasing role of Latinos and Latino affairs in modern American society. It argues that a combination of foreign and domestic entrepreneurs and innovators who overcame large odds resolves a significant and timely question: In an English-speaking country, how could a Spanish-speaking institution have emerged? Through exploration of significant and colorful pioneers, continuing conflicts and setbacks, landmark strides, and ongoing controversies—and with revelations that include regulatory indecision, behind-the-scenes tug-of-war, and the internationalization of U.S. mass media—the rise of a Spanish-language institution in the English-speaking U.S. is explained. Nine chapters that begin with Spanish-language television’s inception in 1961 and end 2012 chronologically narrate the endeavor’s first 50 years. Events, passages, and themes are thoroughly referenced.

scholarly journals The Role of the United States and The “Asian Solution” Approach in the Malaysia-Indonesia Confrontation (1963-1966)

2020 ◽  
Author(s):  
Rohani Hj Ab Ghani ◽  
Zulhilmi Paidi
Keyword(s):  
United States ◽  
Cold War ◽  
The United States ◽  
Asian Countries ◽  
Power Struggle ◽  
Solution Approach ◽  
Major Powers ◽  
Asian Region ◽  
The U.S

The Indonesia-Malaysia confrontation between 1963-1966 was an important event attracting the attention of politicians and scholars alike as the conflict had threatened the long existing relations between the two countries. Indonesian confrontation with Malaysia was due to its refusal to accept the formation of the new federation of Malaysia, founded on 16th September 1963. Sukarno’s confrontational stand on this had broken the long-standing sentiments of regional brotherhood or “saudara serumpun” that had nurtured between the two countries for many years. The conflict also saw the involvement of major powers like the United States (U.S.), Britain, China and Russia in the midst of bipolar power struggle between the communist and the anti-communist as part of the ongoing Cold War. The three years of confrontation witnessed great attempts at peace efforts by U.S. Although U.S. involvement in the conflict was merely as a moderator for both countries it was also fueled by its efforts of containment of communism in the Southeast Asian region. The U.S. viewed that the conflict should be resolved in the context of “Asian solution” as it involved two Asian countries A settlement to the Malaysia-Indonesia confrontation was finally achieved through the Bangkok Agreement, signed in August 1966. This paper discusses the role of U.S. in its attempts at finding an amicable settle to the confrontation in the form of “Asian solution.”  

scholarly journals Ewolucja instytucji sędziów pokoju w Stanach Zjednoczonych

2019 ◽  
Vol 28 (1) ◽  
pp. 39
Author(s):  
Ewa Gmurzyńska
Keyword(s):  
United States ◽  
The United States ◽  
General Tendency ◽  
Court Decisions ◽  
American Democracy ◽  
Modern Times ◽  
Justices Of The Peace ◽  
Pros And Cons ◽  
The U.S

<p class="Normalny1">This article presents a history and development of the institution of justices of the peace in the United States from the beginning of formation of American democracy until modern times. It presents jurisdiction, the scope of the activities and the role of justices of the peace in several states through different periods of times. It includes a thorough discussion concerning pros and cons of justices of the peace in the U.S. legal system and general tendency of declining the institution of justices of the peace in modern times. The article includes also a discussion of the major court decisions concerning justices of the peace.</p>

scholarly journals Sample-Selection Biases and the Industrialization Puzzle

2017 ◽  
Vol 77 (1) ◽  
pp. 171-207 ◽  
Author(s):  
Howard Bodenhorn ◽  
Timothy W. Guinnane ◽  
Thomas A. Mroz
Keyword(s):  
United States ◽  
Selection Bias ◽  
Meta Analysis ◽  
Sample Selection ◽  
Well Being ◽  
The United States ◽  
Compelling Evidence ◽  
Long Term Changes ◽  
The U.S

Understanding long-term changes in human well-being is central to understanding the consequences of economic development. An extensive anthropometric literature purports to show that heights in the United States declined between the 1830s and the 1890s, which is when the U.S. economy modernized. Most anthropometric research contends that declining heights reflect the negative health consequences of industrialization and urbanization. This interpretation, however, relies on sources subject to selection bias. Our meta-analysis shows that the declining height during industrialization emerges primarily in selected samples. We also develop a parsimonious diagnostic test that reveals, but does not correct for, selection bias in height samples. When applied to four representative height samples, the diagnostic provides compelling evidence of selection.

Youth Negotiate Deportation

2019 ◽  
pp. 135-146
Author(s):  
Lauren Heidbrink
Keyword(s):  
United States ◽  
Young People ◽  
The United States ◽  
Children And Youth ◽  
Ethnographic Research ◽  
Institutional Practices ◽  
Unaccompanied Children ◽  
Forced Return ◽  
The U.S

This chapter chronicles how young people experience deportation from the United States to Guatemala. It examines the policies and institutional practices that govern the removal of unaccompanied children and trace the ways in which young people and their families understand and navigate these policies and practices. Through multi-sited ethnographic research in the United States and Guatemala, the chapter reveals the various impacts of the forced “repatriation” of children, exacerbating the very conditions that spurred their migration and causing new interrelated uncertainties and related risks as “deportees.” As they are physically expelled from the United States, deported young people move out of U.S. legal systems. The effects of a forced “return” to their nations of origin produce new challenges such as feelings of isolation and vulnerability as well as danger, such that, in many ways, they continue to be in and moving through regimes of illegality. Demonstrating the long-term and geographically distant effects of the U.S. government’s deportation of children and youth, the chapter outlines the confining character of being out of a system, especially if once in it.

Chilean Copper and U.S. Companies

2020 ◽  
pp. 97-117
Author(s):  
Sebastián Hurtado-Torres
Keyword(s):  
United States ◽  
Cold War ◽  
The United States ◽  
The Political ◽  
Political Debate ◽  
Democratic Government ◽  
Chilean Copper ◽  
The Cold War ◽  
The U.S

This chapter focuses on the role of copper policies in the relations between the United States and Chile during the Frei administration, especially as they relate to the developmental efforts of the Christian Democratic project. During the Frei administration, the political debate on copper policies reached a climax. Since U.S. capitals were among the most significant actors in the story, the discussions around the issue of copper converged with the ideological visions of the United States and the Cold War held by the different Chilean political parties. As the Frei administration tried to introduce the most comprehensive and consistent reform around the structure of the property of the Gran Minería del Cobre, the forces in competition in the arena of Chilean politics stood by their ideological convictions, regarding both copper and the United States, in their opposition or grudging support for the policies proposed by the Christian Democratic government. Moreover, the U.S. government became deeply involved in the matter of copper in Chile, first by pressuring the Chilean government into rolling back a price increase in 1965 and then, mostly through the personal efforts of Ambassador Edward Korry, by mediating in the negotiation between the Frei administration and Anaconda on the nationalization of the U.S. company's largest mine, Chuquicamata, in 1969.

Planning or Improvisation

2020 ◽  
pp. 116-120
Author(s):  
Alasdair Roberts
Keyword(s):  
United States ◽  
Twentieth Century ◽  
Large Scale ◽  
The United States ◽  
Unintended Consequences ◽  
Governance Strategies ◽  
The Face ◽  
Imperfect Knowledge

This chapter assesses the role of planning in the design of governance strategies. Enthusiasm for large-scale planning—also known as overall, comprehensive, long-term, economic, or social planning—boomed and collapsed in twentieth century. At the start of that century, progressive reformers seized on planning as the remedy for the United States' social and economic woes. By the end of the twentieth century, enthusiasm for large-scale planning had collapsed. Plans could be made, but they were unlikely to be obeyed, and even if they were obeyed, they were unlikely to work as predicted. The chapter then explains that leaders should make plans while being realistic about the limits of planning. It is necessary to exercise foresight, set priorities, and design policies that seem likely to accomplish those priorities. Simply by doing this, leaders encourage coordination among individuals and businesses, through conversation about goals and tactics. Neither is imperfect knowledge a total barrier to planning. There is no “law” of unintended consequences: it is not inevitable that government actions will produce entirely unexpected results. The more appropriate stance is modesty about what is known and what can be achieved. Plans that launch big schemes on brittle assumptions are more likely to fail. Plans that proceed more tentatively, that allow room for testing, learning, and adjustment, are less likely to collapse in the face of unexpected results.

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