scholarly journals Buckwheat breeding and production in Russia during the past 100 years

2019 ◽  
Vol 180 (1) ◽  
pp. 113-117
Author(s):  
A. N. Fesenko ◽  
I. N. Fesenko
Keyword(s):  
Climate Changes ◽  
Agricultural Technology ◽  
Abrupt Increase ◽  
Seed Shattering ◽  
First Order ◽  
The Past ◽  
Important Region ◽  
Determinate Growth ◽  
Determinate Growth Habit ◽  
The 1960S

Average buckwheat yield in Russia has increased from 0.49 to 0.94 t/ha (1.9 times) in the period from the 1960s to 2011-2017, which is comparable to the growth of wheat yields for the same period (2.1 times, from 1.18 to 2.42 t/ha). However, if the growth in wheat yields occurred gradually, the entire growth of buckwheat yield falls on the beginning of the 21st century. Such differences in dynamics indicate that the increase in buckwheat yield is not related to the improvements in agricultural technology or climate changes. Nor it is related to any significant changes in the structure of buckwheat sowing regions, as the average yield in the most important region of buckwheat cultivation, Altai Territory, is only 0.91 t/ha (i. e. less than the country’s average). Chronologically, the period of an abrupt increase in the yield of buckwheat in Russia coincides with widespread introduction of cultivars with determinate growth habit (determinants). Since 1999, the share of determinant varieties in the total area under buckwheat in Russia has increased from 8.2 to 56.7%. Apparently, it was a main cause for the significant growth of buckwheat yield in Russia. Determinant cultivars based on the d (det) mutation are characterized by reduced plant height, reduced number of flowers on shoots, and more intensive and fast blossoming of inflorescences (and, consequently, more intensive and fast maturation). The increased morphological potential of productivity (the number of vegetative nodes on the stem and first – order branches) ensures a higher level of yield for these cultivars. At present, our lab is developing determinant buckwheat cultivars using some additional mutations. A major success in this work has been the world’s first determinant cultivar with green flowers (the gc mutation) named ‘Design’, which develops thicker and stronger fruit stalks with higher resistance to seed shattering.

How the Desert got a Past: A History of Quaternary Research in Australia’s Deserts

2014 ◽  
Vol 25 (2) ◽  
pp. 172 ◽  
Author(s):  
Mike Smith
Keyword(s):  
Climate Changes ◽  
Conceptual Space ◽  
The Past ◽  
History Of ◽  
The 1960S

This paper examines how the past of desert landscapes has been interpreted since European explorers and scientists first encountered them. It charts the research that created the conceptual space within which archaeologists and Quaternarists now work. Studies from the 1840s–1960s created the notion of a ‘Great Australian Arid Period'. The 1960s studies of Lake Mungo and the Willandra Lakes by Jim Bowler revealed the cyclical nature of palaeolakes, that changed with climate changes in the Pleistocene, and the complexity of desert pasts. SLEADS and other researchers in the 1980s used thermoluminescence techniques that showed further complexities in desert lands beyond the Willandra particularly through new studies in the Strzelecki and Simpson Dunefields, Lake Eyre, Lake Woods and Lake Gregory. Australian deserts are varied and have very different histories. Far from ‘timeless lands', they have carried detailed information about long-term climate changes on continental scales.

scholarly journals A probe into the different fates of locust swarms in the plains of North America and East Asia

2012 ◽  
Vol 9 (8) ◽  
pp. 11179-11200
Author(s):  
G. Yu ◽  
D. Johnson ◽  
X. Ke ◽  
Y. Li
Keyword(s):  
Global Warming ◽  
North America ◽  
East Asia ◽  
Climate Changes ◽  
East Asian ◽  
Climate Extremes ◽  
Climate Extreme ◽  
The Past ◽  
The 1960S ◽  
Chemical Pesticides

Abstract. Locust swarms had periodically raged in both North American Plains (NAP) and East Asian Plains (EAP) before 1880 AD. After this period, the locust outbreaks almost never recurred in NAP but have continued to occur in EAP. Since large quantities of pesticides were used in the major agriculture regions of NAP in the late 1870s; this has been suggested as a possible major cause of the disappearing of locust outbreaks. Extensive applications of more effective chemical pesticides were also used in the granary regions of EAP in the 1950s in an effort to kill the pests at a much higher intensity. However, locust swarms came back again in many areas of China in the 1960s. Therefore, NAP locust extinction still remains a puzzle. Frequent locust outbreaks in EAP over the past 130 yr may offer clues to probe key control elements in the disappearing of locust outbreaks in NAP. This paper analyzes the climate extremes and monthly temperature-precipitation combines of NAP and EAP, and found the differences in their frequencies of these climate combines caused different locust fates in the two regions: restrained the locust outbreak in NAP but induced such events in EAP. Validation shows that severer EAP locust outbreak years were coincided with the climate extreme combines years. Thus we suggest that climate changes in frequency, extremes and trends can explain why the fate of the locust plague in EAP was different from that in NAP. The study also points out that, under the present global warming, cautions should be taken to make sure the pest hazard being nipped in the-bud.

Problems of Analysis of Design and Research Methods of Interaction with the Urban Environment

2020 ◽  
pp. 99-110
Author(s):  
П. В. Капустин ◽  
А. И. Гаврилов
Keyword(s):  
Urban Planning ◽  
Urban Environment ◽  
Urban Studies ◽  
Environmental Movement ◽  
The Past ◽  
Types Of Knowledge ◽  
Historical Dynamics ◽  
The 1960S ◽  
The City ◽  
Research And Design

Состояние проблемы. Проблематика городской среды заявила о себе в 1960-е годы как протест против модернистских методов урбанизма и других видов проектирования. Средовое движение не случайно тогда именовали «антипрофессиональным» - оно было направлено против устоявшихся и недейственных методов работы с городом - от исследования до управления. За прошедшие десятилетия в рамках самого средового движения и его идейных наследников наработано немало методов и приемов работы, однако они до сих не подвергались анализу как пребывающая в исторической динамике целостная совокупность инструментария, альтернативного традиционному градостроительству. Результаты. Рассмотрены особенности и проблемы анализа методологического «арсенала» средового движения и урбанистики. Методы работы с городской средой впервые структурированы по типам знания. Показана близость методов исследовательского и проектного подходов в отношении городской среды. Выводы. В ближайшее время можно ожидать появления новых синтетических знаний и частных методологий, связанных как с обострением средовой проблематики, с расширением круга средовых акторов, так и с процессом профессионализации урбанистики. Statement of the problem. The urban environment paradigm emerged in the 1960s as a protest against the modernist methods of urbanism and other types of design. It was no coincidence that the environmental movement was back then called "anti-professional" as it was directed against the established and ineffective methods of working with the city, i. e., from research to management. Over the past decades, within the framework of the environmental movement and its ideological heirs, a lot of methods and have been developed. However, they have not yet been analyzed as an integral set of tools in the historical dynamics which is an alternative to traditional urban planning. Results. The features and problems of the analysis of the methodological “arsenal” of environmental movement and urban studies are considered. The methods of working with the urban environment are first structured according to the types of knowledge. The proximity of research and design approaches in the case when the urban environment is dealt with is shown. Conclusions. In the nearest future, we can expect new synthetic knowledge and particular methodologies related to both the exacerbation of environmental problems to emerge as well as the expansion of the circle of environmental actors and the process of professionalization of urbanstics.

scholarly journals Sink Strength Maintenance Underlies Drought Tolerance in Common Bean

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 489
Author(s):  
Amber Hageman ◽  
Elizabeth Van Volkenburgh
Keyword(s):  
Common Bean ◽  
Sink Strength ◽  
Total Biomass ◽  
Seed Filling ◽  
Uptake Rates ◽  
Determinate Growth ◽  
Determinate Growth Habit ◽  
Water Limitations ◽  
Uptake And Metabolism ◽  
Do So

Drought is a major limiter of yield in common bean, decreasing food security for those who rely on it as an important source of protein. While drought can have large impacts on yield by reducing photosynthesis and therefore resources availability, source strength is not a reliable indicator of yield. One reason resource availability does not always translate to yield in common bean is because of a trait inherited from wild ancestors. Wild common bean halts growth and seed filling under drought and awaits better conditions to resume its developmental program. This trait has been carried into domesticated lines, where it can result in strong losses of yield in plants already producing pods and seeds, especially since many domesticated lines were bred to have a determinate growth habit. This limits the plants ability to produce another flush of flowers, even if the first set is aborted. However, some bred lines are able to maintain higher yields under drought through maintaining growth and seed filling rates even under water limitations, unlike their wild predecessors. We believe that maintenance of sink strength underlies this ability, since plants which fill seeds under drought maintain growth of sinks generally, and growth of sinks correlates strongly with yield. Sink strength is determined by a tissue’s ability to acquire resources, which in turn relies on resource uptake and metabolism in that tissue. Lines which achieve higher yields maintain higher resource uptake rates into seeds and overall higher partitioning efficiencies of total biomass to yield. Drought limits metabolism and resource uptake through the signaling molecule abscisic acid (ABA) and its downstream affects. Perhaps lines which maintain higher sink strength and therefore higher yields do so through decreased sensitivity to or production of ABA.

scholarly journals d4PDF: large-ensemble and high-resolution climate simulations for global warming risk assessment

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Masayoshi Ishii ◽  
Nobuhito Mori
Keyword(s):  
Risk Assessment ◽  
Global Warming ◽  
High Resolution ◽  
Climate Changes ◽  
Future Climate ◽  
Atmospheric Models ◽  
Large Ensemble ◽  
Past Climate ◽  
The Past ◽  
Climate Simulations

Abstract A large-ensemble climate simulation database, which is known as the database for policy decision-making for future climate changes (d4PDF), was designed for climate change risk assessments. Since the completion of the first set of climate simulations in 2015, the database has been growing continuously. It contains the results of ensemble simulations conducted over a total of thousands years respectively for past and future climates using high-resolution global (60 km horizontal mesh) and regional (20 km mesh) atmospheric models. Several sets of future climate simulations are available, in which global mean surface air temperatures are forced to be higher by 4 K, 2 K, and 1.5 K relative to preindustrial levels. Nonwarming past climate simulations are incorporated in d4PDF along with the past climate simulations. The total data volume is approximately 2 petabytes. The atmospheric models satisfactorily simulate the past climate in terms of climatology, natural variations, and extreme events such as heavy precipitation and tropical cyclones. In addition, data users can obtain statistically significant changes in mean states or weather and climate extremes of interest between the past and future climates via a simple arithmetic computation without any statistical assumptions. The database is helpful in understanding future changes in climate states and in attributing past climate events to global warming. Impact assessment studies for climate changes have concurrently been performed in various research areas such as natural hazard, hydrology, civil engineering, agriculture, health, and insurance. The database has now become essential for promoting climate and risk assessment studies and for devising climate adaptation policies. Moreover, it has helped in establishing an interdisciplinary research community on global warming across Japan.

scholarly journals A new diatom training set for the reconstruction of past water pH in the Tatra Mountain lakes

2021 ◽  
Author(s):  
Elwira Sienkiewicz ◽  
Michał Gąsiorowski ◽  
Ladislav Hamerlík ◽  
Peter Bitušík ◽  
Joanna Stańczak
Keyword(s):  
Surface Sediments ◽  
Tatra Mountains ◽  
Training Set ◽  
Statistical Parameters ◽  
The Past ◽  
Water Ph ◽  
Inferred Ph ◽  
The 1960S ◽  
The Tatra Mountains ◽  
The Relationship

AbstractLakes located in the Polish and Slovak parts of the Tatra Mountains were included in the Tatra diatom database (POL_SLOV training set). The relationship between the diatoms and the water chemistry in the surface sediments of 33 lakes was the basis for the statistical and numerical techniques for quantitative pH reconstruction. The reconstruction of the past water pH was performed using the alpine (AL:PE) and POL_SLOV training sets to compare the reliability of the databases for the Tatra lakes. The results showed that the POL_SLOV training set had better statistical parameters (R2 higher by 0.16, RMSE and max. bias lower by 0.2 and 0.36, respectively) compared to the AL:PE training set. The better performance of the POL_SLOV training set is particularly visible in the case of Przedni Staw Polski where the curve of the inferred water pH shows an opposite trend for the period from the 1960s to 1990 compared to that based on the AL:PE dataset. The reliability of the inferred pH was confirmed by the comparison with current instrumental measurements.

scholarly journals Criminology: Some lines of flight

2021 ◽  
Vol 54 (1) ◽  
pp. 21-33
Author(s):  
Julie Berg ◽  
Clifford Shearing
Keyword(s):  
21St Century ◽  
Energy Systems ◽  
Social Practices ◽  
Smart Phones ◽  
40Th Anniversary ◽  
The Past ◽  
Domain Of Existence ◽  
James Lovelock ◽  
The 1960S ◽  
Space Of Flows

The 40th Anniversary Edition of Taylor, Walton and Young’s New Criminology, published in 2013, opened with these words: ‘The New Criminology was written at a particular time and place, it was a product of 1968 and its aftermath; a world turned upside down’. We are at a similar moment today. Several developments have been, and are turning, our 21st century world upside down. Among the most profound has been the emergence of a new earth, that the ‘Anthropocene’ references, and ‘cyberspace’, a term first used in the 1960s, which James Lovelock has recently termed a ‘Novacene’, a world that includes both human and artificial intelligences. We live today on an earth that is proving to be very different to the Holocene earth, our home for the past 12,000 years. To appreciate the Novacene one need only think of our ‘smart’ phones. This world constitutes a novel domain of existence that Castells has conceived of as a terrain of ‘material arrangements that allow for simultaneity of social practices without territorial contiguity’ – a world of sprawling material infrastructures, that has enabled a ‘space of flows’, through which massive amounts of information travel. Like the Anthropocene, the Novacene has brought with it novel ‘harmscapes’, for example, attacks on energy systems. In this paper, we consider how criminology has responded to these harmscapes brought on by these new worlds. We identify ‘lines of flight’ that are emerging, as these challenges are being met by criminological thinkers who are developing the conceptual trajectories that are shaping 21st century criminologies.

scholarly journals Mathematical Creativity in Adults: Its Measurement and Its Relation to Intelligence, Mathematical Competence and General Creativity

2021 ◽  
Vol 9 (1) ◽  
pp. 10
Author(s):  
Michaela A. Meier ◽  
Julia A. Burgstaller ◽  
Mathias Benedek ◽  
Stephan E. Vogel ◽  
Roland H. Grabner
Keyword(s):  
Exploratory Study ◽  
Mathematical Creativity ◽  
Good Reliability ◽  
Mathematical Competence ◽  
First Order ◽  
The Past ◽  
Confirmatory Factor ◽  
Order Factor ◽  
General Creativity ◽  
Creativity Measure

Mathematical creativity is perceived as an increasingly important aspect of everyday life and, consequently, research has increased over the past decade. However, mathematical creativity has mainly been investigated in children and adolescents so far. Therefore, the first goal of the current study was to develop a mathematical creativity measure for adults (MathCrea) and to evaluate its reliability and construct validity in a sample of 100 adults. The second goal was to investigate how mathematical creativity is related to intelligence, mathematical competence, and general creativity. The MathCrea showed good reliability, and confirmatory factor analysis confirmed that the data fitted the assumed theoretical model, in which fluency, flexibility, and originality constitute first order factors and mathematical creativity a second order factor. Even though intelligence, mathematical competence, and general creativity were positively related to mathematical creativity, only numerical intelligence and general creativity predicted unique variance of mathematical creativity. Additional analyses separating quantitative and qualitative aspects of mathematical creativity revealed differential relationships to intelligence components and general creativity. This exploratory study provides first evidence that intelligence and general creativity are important predictors for mathematical creativity in adults, whereas mathematical competence seems to be not as important for mathematical creativity in adults as in children.

Old and New Results for First Order Periodic ODEs without Uniqueness: a Comprehensive Study by Lower and Upper Solutions

2004 ◽  
Vol 4 (3) ◽  
Author(s):  
Franco Obersnel ◽  
Pierpaolo Omari
Keyword(s):  
Cauchy Problem ◽  
Differential Equations ◽  
Lower And Upper Solutions ◽  
Elementary Approach ◽  
Qualitative Properties ◽  
First Order ◽  
The Past ◽  
The Cauchy Problem ◽  
Qualitative Properties Of Solutions ◽  
Comprehensive Study

AbstractAn elementary approach, based on a systematic use of lower and upper solutions, is employed to detect the qualitative properties of solutions of first order scalar periodic ordinary differential equations. This study is carried out in the Carathéodory setting, avoiding any uniqueness assumption, in the future or in the past, for the Cauchy problem. Various classical and recent results are recovered and generalized.

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