Soil tillage erosion estimated by using magnetism of soils—a case study from Bulgaria

2011 ◽  
Vol 183 (1-4) ◽  
pp. 381-394 ◽  
Author(s):  
Diana Jordanova ◽  
Neli Jordanova ◽  
Anna Atanasova ◽  
Tsenka Tsacheva ◽  
Petar Petrov
Keyword(s):  
Soil Tillage ◽  
Tillage Erosion

THE USE OF CASE STUDY METHOD IN TEACHING THE TERMINOLOGY IN THE FIELD OF AGRICULTURAL MACHINERY

2019 ◽  
pp. 123-130
Keyword(s):  
Case Studies ◽  
High Performance ◽  
Mechanical Engineering ◽  
The United States ◽  
Machine Building ◽  
Soil Tillage ◽  
Case Study Method ◽  
Agricultural Machine ◽  
Manufacturing Machine

The scientific research works concerning the field of mechanical engineering such as, manufacturing machine slate, soil tillage, sowing and harvesting based on the requirements for the implementation of agrotechnical measures for the cultivation of plants in its transportation, through the development of mastering new types of high-performance and energy-saving machines in manufacturing machine slate, creation of multifunctional machines, allowing simultaneous soil cultivation, by means of several planting operations, integration of agricultural machine designs are taken into account in manufacturing of the local universal tractor designed basing on high ergonomic indicators. For this reason, this article explores the use of case studies in teaching agricultural terminology by means analyzing the researches in machine building. Case study method was firstly used in 1870 in Harvard University of Law School in the United States. Also in the article, we give the examples of agricultural machine-building terms, teaching terminology and case methods, case study process and case studies method itself. The research works in the field of mechanical engineering and the use of case studies in teaching terminology have also been analyzed. In addition, the requirements for the development of case study tasks are given in their practical didactic nature. We also give case study models that allow us analyzing and evaluating students' activities.

Formation and Land-Use History of Celtic Fields in North-West Europe – an Interdisciplinary Case Study at Zeijen, the Netherlands

2003 ◽  
Vol 6 (2) ◽  
pp. 141-173 ◽  
Author(s):  
Theo Spek ◽  
Willy Groenman-van Waateringe ◽  
Maja Kooistra ◽  
Lideweij Bakker
Keyword(s):  
Land Use ◽  
The Netherlands ◽  
Iron Age ◽  
Large Scale ◽  
Roman Period ◽  
Soil Tillage ◽  
North West ◽  
Late Iron Age ◽  
History Of

Celtic field research has so far been strongly focused on prospection and mapping. As a result of this there is a serious lack of knowledge of formation and land-use processes of these fields. This article describes a methodological case study in The Netherlands that may be applied to other European Celtic fields in the future. By interdisciplinary use of pedological, palynological and micromorphological research methods the authors were able to discern five development stages in the history of the field, dating from the late Bronze Age to the early Roman Period. There are strong indications that the earthen ridges, very typical for Celtic fields in the sandy landscapes of north-west Europe, were only formed in the later stages of Celtic field agriculture (late Iron Age and early Roman period). They were the result of a determined raising of the surface by large-scale transportation of soil material from the surroundings of the fields. Mainly the ridges were intensively cultivated and manured in the later stages of Celtic field cultivation. In the late Iron Age a remarkable shift in Celtic field agriculture took place from an extensive system with long fallow periods, a low level of manuring and extensive soil tillage to a more intensive system with shorter fallow periods, a more intensive soil tillage and a higher manuring intensity. There are also strong indications that rye (Secale cereale) was the main crop in the final stage of Celtic field agriculture.

Rethinking vineyard ground management to counter soil tillage erosion

2022 ◽  
Vol 217 ◽  
pp. 105275
Author(s):  
Luciano Gristina ◽  
Agata Novara ◽  
Mario Minacapilli
Keyword(s):  
Soil Tillage ◽  
Tillage Erosion

scholarly journals The Effect of Shallow Tillage on Soil Erosion in a Semi-Arid Vineyard

Agronomy ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 257 ◽  
Author(s):  
Agata Novara ◽  
Giovanni Stallone ◽  
Artemio Cerdà ◽  
Luciano Gristina
Keyword(s):  
Soil Erosion ◽  
Soil Degradation ◽  
Erosion Rate ◽  
Arable Land ◽  
Water Erosion ◽  
Soil Tillage ◽  
Strip Tillage ◽  
The Impact ◽  
Semi Arid ◽  
Tillage Erosion

Soil erosion has been considered a threat for semi-arid lands due to the removal of solid materials by water and wind. Although water erosion is currently considered the most important process of soil degradation, a growing interest has been drawn to the impact of soil tillage. Although numerous studies on tillage erosion have been carried out on arable land using a moldboard plow, a chisel, and a tandem disc for different crops, there are no studies on the effect of shallow tillage on soil redistribution in vineyards. The aim of this work was to evaluate the soil tillage erosion rate in a vineyard using a 13C natural abundance tracer. A strip of soil (C3-C soil) was removed, mixed with C4-C tracer, and replaced. After the installation of the strip, tillage (upslope in one inter-row and downslope in the other inter-row) was performed with a cultivator and soil was collected along the slope with an interval of 0.2 m from the C4-C strip. Soil organic carbon and δ13C were measured and the total mass of translocated soil (T) soil was calculated. The net effect of tillage after two consecutive operations (downslope and upslope tillage) was a T of 49.3 ± 4.2 kg m−1. The estimated annual erosion rate due to tillage in the studied vineyard was 9.5 ± 1.2 Mg ha−1year−1. The contribution of the soil tillage erosion rate was compared with that of water erosion in the same vineyard, and we conclude that tillage is a threat to soil degradation.

scholarly journals Interactive Effects of Subsidiary Crops and Weed Pressure in the Transition Period to Non-Inversion Tillage, A Case Study of Six Sites Across Northern and Central Europe

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 495 ◽  
Author(s):  
Marie Reimer ◽  
Björn Ringselle ◽  
Göran Bergkvist ◽  
Sally Westaway ◽  
Raphaël Wittwer ◽  
...  
Keyword(s):  
Central Europe ◽  
Cover Crops ◽  
Transition Period ◽  
N Fertilization ◽  
Transition Phase ◽  
Interactive Effects ◽  
Soil Tillage ◽  
Site Specific ◽  
Fertilization Level

Reducing soil tillage can lead to many benefits, but this practice often increases weed abundance and thus the need for herbicides, especially during the transition phase from inversion tillage to non-inversion tillage. We evaluated if subsidiary crops (SCs, e.g., cover crops) can mitigate the effects of non-inversion tillage on weed abundance. Two-year experiments studying SC use, tillage intensity, and nitrogen (N) fertilization level were carried out twice at six sites throughout northern and central Europe. SCs significantly reduced weed cover throughout the intercrop period (−55% to −1% depending on site), but only slightly during the main crops. Overall weed abundance and weed biomass were higher when using non-inversion tillage with SCs compared to inversion tillage without SCs. The effects differed due to site-specific weed pressure and management. With increasing weed pressure, the effect of SCs decreased, and the advantage of inversion over non-inversion tillage increased. N fertilization level did not affect weed abundance. The results suggest that SCs can contribute by controlling weeds but cannot fully compensate for reduced weed control of non-inversion tillage in the transition phase. Using non-inversion tillage together with SCs is primarily recommended in low weed pressure environments.

Corrigendum to “Do conservative agriculture practices increase soil water repellency? A case study in citrus-cropped soils” [Soil Tillage Res. 124 (2012), 233–239]

2013 ◽  
Vol 128 ◽  
pp. 156 ◽  
Author(s):  
Félix A. González-Peñaloza ◽  
Artemi Cerdà ◽  
Lorena M. Zavala ◽  
Antonio Jordán ◽  
Antonio Giménez-Morera ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Repellency ◽  
Soil Tillage ◽  
Soil Water Repellency

The Genesis and Internal Dynamics of El Salvador's People's Revolutionary Army, 1970–1976

2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO
Keyword(s):  
Latin America ◽  
El Salvador ◽  
Early Years ◽  
Left Wing ◽  
Internal Dynamics ◽  
Internal Coherence ◽  
The 1960S

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.

Culture and the plasticity of perception

2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann
Keyword(s):  
Cultural Context ◽  
Sensory Experience ◽  
Cultural Learning ◽  
The World

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.

Sign in / Sign up

Export Citation Format

Share Document