scholarly journals Soil modification in a chronosequence of postagricultural ecosystems of the intrazonal lithogenic matrix (Arkhangelsk region, Russia)

2019 ◽  
Vol 72 (4) ◽  
Author(s):  
Elena Nakvasina ◽  
Tatyana Parinova ◽  
Alexey Volkov ◽  
Anna Popova ◽  
Nadezhda Prozherina
Keyword(s):  
Agricultural Production ◽  
Soil Restoration ◽  
Agricultural Practice ◽  
Restoration Process ◽  
The Past ◽  
Arkhangelsk Region ◽  
Floodplain Soils ◽  
Short Period ◽  
Floodplain Meadow ◽  
Soil Modification

Processes of soil self-restoration and soil modification in the chronosequence of postagricultural ecosystems located within the intrazonal (floodplain) soils of boreal forests were studied. Successional changes in ecological features of the floodplain meadow soil properties in the postagricultural period were considered. We used arable land plots (22 model fields) in the Northern Dvina River delta (Primorsky District, Arkhangelsk region, Northwestern Russia) that have been removed from agricultural practice for the past 50 years and are currently at the self-overgrowing stage. Primary/secondary floodplain meadows with natural floodplain soils were used as reference plots. Changes in soil profiles and chemical properties in an old-arable horizon were observed during the restoration of abandoned fields. Floodplain soils of the Northern Dvina River basin occupied 4.8% of the area. These soils were characterized by high fertility and were actively used in agricultural production in the past. Postagricultural ecosystems of the Northern Dvina River floodplain tended to form natural waterlogged soils to varying extents. Ecosystems were characterized by a short period of soil restoration. The soil restoration process was slower than the vegetation cover restoration process. Soil fertility of the arable horizon persisted for 20 years. A cost-effective return of floodplain meadow lands to agricultural production is feasible over a period of 40 years. Then, soils return to natural floodplain soils, whereby they become waterlogged and lose their fertility.

The Origin of the Moon and its Relationship to the Origin of the Solar System

1962 ◽  
Vol 14 ◽  
pp. 133-148 ◽  
Author(s):  
Harold C. Urey
Keyword(s):  
Solar System ◽  
The Moon ◽  
The Past ◽  
The Earth ◽  
Short Period ◽  
Origin Of The Moon

During the last 10 years, the writer has presented evidence indicating that the Moon was captured by the Earth and that the large collisions with its surface occurred within a surprisingly short period of time. These observations have been a continuous preoccupation during the past years and some explanation that seemed physically possible and reasonably probable has been sought.

An Overview of Rural to Urban Migration in China and Social Challenges

2019 ◽  
Vol 16 (2) ◽  
pp. 273-282
Author(s):  
Ziwei Qi
Keyword(s):  
Agricultural Production ◽  
Rural Populations ◽  
Urban Migration ◽  
Open Market ◽  
Labour Demand ◽  
Social Challenges ◽  
The Past ◽  
Internal Migrations ◽  
Rural To Urban Migration ◽  
Employment Sectors

The rural to urban migration in China represents one of the greatest internal migrations of people in history as rural populations have moved to cities in response to growing labour demand. One major cause of the increased labour demand was the “Reform and Open Market Policy” initiated at the end of the 1970s. The policy amplified the rural to urban divide by promoting a more thoroughly market-based economy with a corresponding reduction in the importance of agricultural production and a greater emphasis on non-agricultural market sectors. As a result, a series of economic reforms have drastically changed the cultural and social aspects of the rural area over the past three decades. Many social problems have been created due to rural to urban migration. These problems include institutional discrimination because of the restrictive household registration policies; social stigmatisation and discrimination in state-owned employment sectors and among urban residents; psychological distress and feelings of alienation.

Problems and prospects of land reclamation in the non-Chernozem zone of Russia

2020 ◽  
Author(s):  
V.A. Shevchenko ◽  
Keyword(s):  
Agricultural Production ◽  
Land Reclamation ◽  
Agricultural Practice ◽  
Agricultural Crops ◽  
Agricultural Lands ◽  
High Level

The non-black earth zone of Russia is a zone of guaranteed harvest of major agricultural crops. However, at present, the potential of the reclaimed lands of the Non-Black Earth Region remains largely unrealized. In world agricultural practice, land reclamation combined with the use of modern technical means is an important factor in the development of agriculture, a condition for a consistently high level of agricultural production. Therefore, in all countries, reclaimed lands are given a special status, and the necessary amount of reclamation fund of agricultural lands is created.

Recognition Pattern, Functional Mechanism and Application of Chitin and Chitosan Oligosaccharides in Sustainable Agriculture

2020 ◽  
Vol 26 (29) ◽  
pp. 3508-3521 ◽  
Author(s):  
Xiaochen Jia ◽  
Mijanur R. Rajib ◽  
Heng Yin
Keyword(s):  
Agricultural Production ◽  
Growth And Yield ◽  
Biotic Stresses ◽  
The Past ◽  
Chitosan Oligosaccharides ◽  
Recognition Pattern ◽  
Functional Mechanism ◽  
Chitin And Chitosan ◽  
And Storage ◽  
Further Development

Background: Application of chitin attracts much attention in the past decades as the second abundant polysaccharides in the world after cellulose. Chitin oligosaccharides (CTOS) and its deacetylated derivative chitosan oligosaccharides (COS) were shown great potentiality in agriculture by enhancing plant resistance to abiotic or biotic stresses, promoting plant growth and yield, improving fruits quality and storage, etc. Those applications have already served huge economic and social benefits for many years. However, the recognition mode and functional mechanism of CTOS and COS on plants have gradually revealed just in recent years. Objective: Recognition pattern and functional mechanism of CTOS and COS in plant together with application status of COS in agricultural production will be well described in this review. By which we wish to promote further development and application of CTOS and COS–related products in the field.

scholarly journals Impact of the COVID-19 pandemic on agricultural production, livelihoods, and food security in India: baseline results of a phone survey

Food Security ◽  
2021 ◽  
Author(s):  
Lindsay M. Jaacks ◽  
Divya Veluguri ◽  
Rajesh Serupally ◽  
Aditi Roy ◽  
Poornima Prabhakaran ◽  
...  
Keyword(s):  
Food Security ◽  
Agricultural Production ◽  
Dietary Diversity ◽  
The Past ◽  
Phone Survey ◽  
Extra Food ◽  
The Government ◽  
Time Of Year ◽  
Livestock Products ◽  
The Impact

AbstractThe aim of this study was to evaluate the impact of the COVID-19 lockdown on agricultural production, livelihoods, food security, and dietary diversity in India. Phone interview surveys were conducted by trained enumerators across 12 states and 200 districts in India from 3 to 15 May 2020. A total of 1437 farmers completed the survey (94% male; 28% 30–39 years old; 38% with secondary schooling). About one in ten farmers (11%) did not harvest in the past month with primary reasons cited being unfavorable weather (37%) and lockdown-related reasons (24%). A total of 63% of farmers harvested in the past month (primarily wheat and vegetables), but only 44% had sold their crop; 12% were still trying to sell their crop, and 39% had stored their crop, with more than half (55%) reporting lockdown-related issues as the reason for storing. Seventy-nine percent of households with wage-workers witnessed a decline in wages in the past month and 49% of households with incomes from livestock witnessed a decline. Landless farmers were about 10 times more likely to skip a meal as compared to large farmers (18% versus 2%), but a majority reported receiving extra food rations from the government. Nearly all farmers reported consuming staple grains daily in the past week (97%), 63% consumed dairy daily, 40% vegetables daily, 26% pulses daily, and 7% fruit daily. These values are much lower than reported previously for farmers in India around this time of year before COVID-19: 94–95% dairy daily, 57–58% pulses daily, 64–65% vegetables daily, and 42–43% fruit daily. In conclusion, we found that the COVID-19 lockdown in India has primarily impacted farmers’ ability to sell their crops and livestock products and decreased daily wages and dietary diversity.

RAPIDLY GROWING DYSEMBRYOPLASTIC NEUROEPITHELIAL TUMOR

Neurosurgery ◽  
2006 ◽  
Vol 59 (6) ◽  
pp. E1337-E1338 ◽  
Author(s):  
Oltea Sampetrean ◽  
Taketoshi Maehara ◽  
Nobutaka Arai ◽  
Tetsuo Nemoto
Keyword(s):  
Complex Form ◽  
Interesting Case ◽  
Labeling Index ◽  
Pathological Examination ◽  
Dysembryoplastic Neuroepithelial Tumor ◽  
Complex Partial Seizures ◽  
Ki 67 ◽  
The Past ◽  
Short Period ◽  
Postoperative Diagnosis

Abstract OBJECTIVE During the past 15 years, the concept of dysembryoplastic neuroepithelial tumors has continued to evolve. We present an interesting case of dysembryoplastic neuroepithelial tumor that showed rapid growth during a short period of time. CLINICAL PRESENTATION A 9-year-old boy had been experiencing intractable complex partial seizures since the age of 7 years. Magnetic resonance imaging scans demonstrated a well-demarcated 3.5-cm lesion with a 1.5-cm ring-enhanced core in the left temporal lobe. One month later, the lesion had rapidly grown to occupy three times more space than on the first evaluation, with the ring-enhanced core reaching approximately five times its initial volume. INTERVENTION A combined tumor removal and epileptogenic focus resection surgery was performed immediately. In the pathological examination, the presence of the specific glioneuronal element with a Ki-67 labeling index of lower than 1%, as well as the glial component with a Ki-67 labeling index of 8%, led to a postoperative diagnosis of dysembryoplastic neuroepithelial tumor, complex form. No adjuvant therapy was performed. Five years after surgery, there is no evidence of any recurrence and the boy continues to be seizure free without antiepileptic drugs. CONCLUSION The lesion did not behave as a stable benign entity as it is generally accepted, and is, therefore, presented as an argument in favor of an early and complete resection.

scholarly journals Product Complementarity in Production: The By-product Case

1974 ◽  
Vol 6 (2) ◽  
pp. 161-165 ◽  
Author(s):  
Bruce Beattie ◽  
Stassen Thompson ◽  
Michael Boehlje
Keyword(s):  
Production Process ◽  
Production Function ◽  
Environmental Degradation ◽  
Agricultural Production ◽  
Farm Management ◽  
Production Economics ◽  
Production Sector ◽  
The Past ◽  
Product Optimization

The product-product relationship has been a traditional subject of most production economics and farm management courses for the past two decades. Although the traditional examples of product-product optimization have come primarily from the agricultural production sector (e.g., legume-corn rotations and crop-livestock combinations), the concept is useful in analyzing the organization of any multi-product firm-including those firms which produce externalities in the form of environmental degradation.Three concepts or ideas usually are offered as giving rise to a positively sloped or complementary range on the product transformation surface-(l) one production process uses as an input a by-product of another production process, (2) one process uses quantities of a factor that are “surplus” to another, or (3) technical interaction (production function shifts) occurs.

Prospects for increasing the volume of agricultural production for export due to the expansion and intensification of the use of Russian land resources

2021 ◽  
pp. 40-47
Author(s):  
Gennadiy A. Polunin ◽  
Keyword(s):  
Agricultural Production ◽  
Agricultural Land ◽  
Arable Land ◽  
Agricultural Products ◽  
Land Resources ◽  
The Past ◽  
Federal Districts ◽  
Near Future

The article is devoted to substantiating the prospects for increasing the marginal volumes of agricultural production for export in the next four years. Two scenarios of such production are considered: 1) expansion and 2) intensification of the use of land resources. As part of the development of the first scenario, an analysis of the distribution of unused agricultural land, including arable land, by federal districts was carried out. Also, based on the forecast of the introduction of additional annual volumes of acreage in the subjects of the Federation, the calculation of additional volumes of agricultural production, which can be expected in the next four years, was carried out. The analysis of data on the increase in the yield of export-oriented crops over the past five years has been carried out, in the framework of the second scenario, the calculation of the projected additional yield due to the intensification of agriculture is presented. The results of the study indicate that the intensification of agriculture will have the greatest impact on the growth of production and export of agricultural products in the near future.

scholarly journals AT VENDE TILBAGE TIL UKENDTE STEDER - POSTHUKOMMELSE OG STED HOS JACOB DAMMAS, JACOB KOFLER OG MAJA MAGDALENA SWIDERSKA

1970 ◽  
Vol 42 (117) ◽  
pp. 113-130
Author(s):  
Anna Estera Mrozewicz
Keyword(s):  
Second Generation ◽  
Cultural Trauma ◽  
Documentary Films ◽  
The Past ◽  
Personal Stories ◽  
Short Period ◽  
Personal Approach ◽  
Personal Trauma ◽  
Related Identity ◽  
Theoretical Reflection

RETURNING TO UNFAMILIAR PLACES. PLACE AND POSTMEMORY IN THE WORKS OF JACOB DAMMAS, JACOB KOFLER, AND MAJA MAGDALENA SWI-DERSKA | The emigration of three thousand Polish-Jewish citizens to Denmark as a result of the events in March 1968 in Poland has only recently attracted attention from filmmakers and writers in Denmark. Two documentary films and a novel, created within a relatively short period of time, deal with the topic: Jacob Kofler’s Statsløs (Stateless), 2004, Jacob Dammas’ Kredens (Dresser), 2007, and Maja Magdalena Swiderska’s The Border Breaking Bunch, 2008. The authors are all children of refugees and represent second generation in relation to the cultural trauma of exile. The article examines aesthetic approaches developed by the authors as they (re)tell personal stories, which are mediated through various strategies of postmemory (Hirsch 1997). Postmemory is distinguished from memory by a non-indexical relation to the past and a generational distance, and from history by a highly personal approach. However, it is not addressed here as a psychological category. On the contrary, I argue that postmemory can be viewed as both an analytical and a narrative and aesthetic tool. Questions of place and place-related identity are relevant and inseparable from the three authors’ creative reimaginings of the cultural and personal trauma. Thus, the article focuses on the concepts of place and postmemory, and their interdependencies in the analysed works. Close readings are combined with theoretical reflection, which allows the objects and theories to illuminate each other.

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