scholarly journals Estimates of Soil Renewal Rates: Applications for Anti-Erosion Arrangement of the Agricultural Landscape

Geosciences ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 266 ◽  
Author(s):  
Fedor Lisetskii
Keyword(s):  
Organic Carbon ◽  
Soil Quality ◽  
Humus Horizon ◽  
Agricultural Landscape ◽  
Soil Formation ◽  
Agricultural Landscapes ◽  
Crimean Peninsula ◽  
History Of ◽  
T Values ◽  
Over Time

Engineering and geographic substantiation of the anti-erosion organization of agricultural landscapes requires not only differentiated estimations of erosion losses, but also commensurate (in terms of space–time scales) estimations of the soil loss tolerance. The main approaches for determining the participation of estimations of soil formation in the substantiation of erosion tolerance have been defined. This study is aimed at justifying the methods of incorporating the results of pedogenesis modeling into computational methods for organizing agricultural landscapes. This paper presents the results of a study of the process of formation of the humus horizon and the accumulation of organic carbon in soils, based on soils from archaeological sites in the Crimean Peninsula over a period from 25 to 2000 years ago, with differences in climate and parent rock, in a region with a thousand-year history of human activity. The patterns of variation in the thickness of the humus horizons over time and the accumulation of carbon were determined, and estimates for the rate of the pedogenesis were obtained. In connection with the slowing of the rate of pedogenesis over time, the chronofunction of the change in the thickness of soils (of both exponential and logistic types) may be applied and, on this basis, it is possible to calculate the rates of the formation of the humus horizon depending on the morphological status of the soils. During re-naturation of highly degraded soils, maximum renewal rates may take place only with a very high input of organic matter, which is crucial to take into account in the development and implementation of programs for the rehabilitation of degraded lands. Under the conditions of slope agriculture, the rationale for T-values should be linked to many factors of the input and consumption of organic carbon, which provides a logical mathematical model of the formation of soil quality. For soil quality management on agricultural lands, a formula for calculating T-values, using an equation where the rate of pedogenesis is associated with a variety of changes in soil organic carbon, is proposed in this article.

scholarly journals Monitoring soil organic carbon stock changes in agricultural landscapes: Issues and a proposed approach

2006 ◽  
Vol 86 (3) ◽  
pp. 451-463 ◽  
Author(s):  
A J VandenBygaart
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Agricultural Landscape ◽  
Multiple Scales ◽  
Spatial Scales ◽  
Agricultural Landscapes ◽  
Spatial And Temporal Scales ◽  
Landscape Processes ◽  
Daunting Task ◽  
Soc Stock

The distribution of soil organic carbon (SOC) in the landscape is governed by multiple factors and processes occurring at multiple scales. Thus, an understanding of landscape processes and pedology should aid in designing approaches to study SOC stock changes. Numerous factors affect distribution of SOC in the landscape at varying spatial and temporal scales. Each of these is summarized to set the stage for outlining a proposed approach to monitoring SOC in the agricultural landscape. Many tools are used to assess the variability of soil properties at varying spatial scales. Pedological knowledge and interpretation of landscape processes can be used to understand the spatial distribution of SOC in the landscape. I show that semi-variograms and the minimum detectable difference may be of limited value in deriving a universal approach to assess SOC change. Issues to be considered or resolved before initiating a monitoring system include depth of sampling and influence of management, compositing and sub-sampling, changes in bulk density, landscape effects and SOC dynamics. After considering these issues, I propose an approach to monitor SOC stock change in agroecosystems, acknowledging that any methodology likely cannot be strictly and universally applicable. The approach considers issues such as location, plot layout, and experimental and statistical design. Such an approach, derived from a landscape and pedology perspective, may make the measurement and verification of SOC at varying scales a less daunting task. Key words: Soil organic carbon change, landscape, pedology, experimental design

Phanerozoic Oxygen

2017 ◽  
Author(s):  
Donald Eugene Canfield
Keyword(s):  
Oxygen Consumption ◽  
Organic Carbon ◽  
Sea Level ◽  
Time Scale ◽  
Atmospheric Oxygen ◽  
Sea Level Change ◽  
Oxygen Production ◽  
Level Change ◽  
History Of ◽  
Geologic Processes

This chapter discusses the modeling of the history of atmospheric oxygen. The most recently deposited sediments will also be the most prone to weathering through processes like sea-level change or uplift of the land. Thus, through rapid recycling, high rates of oxygen production through the burial of organic-rich sediments will quickly lead to high rates of oxygen consumption through the exposure of these organic-rich sediments to weathering. From a modeling perspective, rapid recycling helps to dampen oxygen changes. This is important because the fluxes of oxygen through the atmosphere during organic carbon and pyrite burial, and by weathering, are huge compared to the relatively small amounts of oxygen in the atmosphere. Thus, all of the oxygen in the present atmosphere is cycled through geologic processes of oxygen liberation (organic carbon and pyrite burial) and consumption (weathering) on a time scale of about 2 to 3 million years.

The Path of Standard Albanian Language Formation

2018 ◽  
Vol 5 (2) ◽  
pp. 106-115
Author(s):  
Sindorela Doli Kryeziu
Keyword(s):  
Single Unit ◽  
Cultural Factors ◽  
Language History ◽  
Whole Process ◽  
History Of ◽  
Social And Cultural Factors ◽  
Cultural Body ◽  
Over Time ◽  
Language Literature

Abstract In our paper we will talk about the whole process of standardization of the Albanian language, where it has gone through a long historical route, for almost a century.When talking about standard Albanian language history and according to Albanian language literature, it is often thought that the Albanian language was standardized in the Albanian Language Orthography Congress, held in Tirana in 1972, or after the publication of the Orthographic Rules (which was a project at that time) of 1967 and the decisions of the Linguistic Conference, a conference of great importance that took place in Pristina, in 1968. All of these have influenced chronologically during a very difficult historical journey, until the standardization of the Albanian language.Considering a slightly wider and more complex view than what is often presented in Albanian language literature, we will try to describe the path (history) of the standard Albanian formation under the influence of many historical, political, social and cultural factors that are known in the history of the Albanian people. These factors have contributed to the formation of a common state, which would have, over time, a common standard language.It is fair to think that "all activity in the development of writing and the Albanian language, in the field of standardization and linguistic planning, should be seen as a single unit of Albanian culture, of course with frequent manifestations of specific polycentric organization, either because of divisions within the cultural body itself, or because of the external imposition"(Rexhep Ismajli," In Language and for Language ", Dukagjini, Peja, 1998, pp. 15-18.)

Transocean and the History of Tax Inversions

2018 ◽  
Vol 34 (1) ◽  
pp. 1-12
Author(s):  
Susan M. Albring ◽  
Randal J. Elder ◽  
Mitchell A. Franklin
Keyword(s):  
Multinational Corporations ◽  
Economic Impacts ◽  
Income Taxes ◽  
Tax Rates ◽  
Corporate Tax ◽  
Corporate Income Taxes ◽  
History Of ◽  
Jobs Act ◽  
The U.S ◽  
Over Time

ABSTRACT The first tax inversion in 1983 was followed by small waves of subsequent inversion activity, including two inversions completed by Transocean. Significant media and political attention focused on transactions made by U.S. multinational corporations that were primarily designed to reduce U.S. corporate income taxes. As a result, the U.S. government took several actions to limit inversion activity. The Tax Cuts and Jobs Act of 2017 (TCJA) significantly lowered U.S. corporate tax rates and one expected impact of TCJA is a reduction of inversion activity. Students use the Transocean inversions to understand the reasons why companies complete a tax inversion and how the U.S. tax code affects inversion activity. Students also learn about the structure of inversion transactions and how they have changed over time as the U.S. government attempted to limit them. Students also assess the tax and economic impacts of inversion transactions to evaluate tax policy.

Historical Representations and Recent Changes

2018 ◽  
Author(s):  
Jürgen Schaflechner
Keyword(s):  
Comparative Analysis ◽  
South Asia ◽  
Oral Histories ◽  
Detailed History ◽  
Modern Times ◽  
History Of ◽  
Historical Representations ◽  
The Rich ◽  
Many Sources ◽  
Over Time

Chapter 3 introduces the tradition of ritual journeys and sacred geographies in South Asia, then hones in on a detailed history of the grueling and elaborate pilgrimage attached to the shrine of Hinglaj. Before the construction of the Makran Coastal Highway the journey to the Goddess’s remote abode in the desert of Balochistan frequently presented a lethally dangerous undertaking for her devotees, the hardships of which have been described by many sources in Bengali, Gujarati, Hindi, Sindhi, and Urdu. This chapter draws heavily from original sources, including travelogues and novels, which are supplanted with local oral histories in order to weave a historical tapestry that displays the rich array of practices and beliefs surrounding the pilgrimage and how they have changed over time. The comparative analysis demonstrates how certain motifs, such as austerity (Skt. tapasyā), remain important themes within the whole Hinglaj genre even in modern times while others have been lost in the contemporary era.

Introduction

2018 ◽  
Author(s):  
Marko Geslani
Keyword(s):  
Comparative Study ◽  
Royal Power ◽  
History Of ◽  
Historical Developments ◽  
The Comparative Study ◽  
The Relationship ◽  
Over Time ◽  
Indian Religion

The introduction reviews the historiographic problem of the relation between fire sacrifice (yajña) and image worship (pūjā), which have traditionally been seen as opposing ritual structures serving to undergird the distinction of “Vedic” and “Hindu.” Against such an icono- and theocentric approach, it proposes a history of the priesthood in relation to royal power, centering on the relationship between the royal chaplain (purohita) and astrologer (sāṃvatsara) as a crucial, unexplored development in early Indian religion. In order to capture these historical developments, it outlines a method for the comparative study of ritual forms over time.

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