scholarly journals Soil survey and characterization of soil of Argo- Gedilala Sub Watershed in Dugda District, Central Rift Valley of Ethiopia

2021 ◽  
Vol 12 (3) ◽  
pp. 94-106
Author(s):  
Abebe Bekele ◽  
Wogi Lemma ◽  
Feyissa Samuel
Keyword(s):  
2009 ◽  
Vol 47 (3) ◽  
pp. 289-298 ◽  
Author(s):  
Tanguy De Bock ◽  
Baptiste Kervyn de Meerendré ◽  
Tim Hess ◽  
Anne-Christine Gouder de Beauregard
Keyword(s):  

Vaccine ◽  
2016 ◽  
Vol 34 (4) ◽  
pp. 523-530 ◽  
Author(s):  
Phillip R. Pittman ◽  
Sarah L. Norris ◽  
Elizabeth S. Brown ◽  
Manmohan V. Ranadive ◽  
Barbara A. Schibly ◽  
...  

OENO One ◽  
1997 ◽  
Vol 31 (4) ◽  
pp. 157
Author(s):  
Isabelle Mérouge ◽  
Dominique Arrouays ◽  
Gérard Seguin

<p style="text-align: justify;">The Pomerol vineyard (France) is located 35 km east from Bordeaux, on the left side of the Isle river. Its area is approximately 800 ha. The geology is made of a system of fluvial terraces, including gravels and stones of various sizes. The underlying substratum is made of tertiary clays and sands. This stratification of terraces of various thickness leads to overlays of very different materials in which various soil development are observed.</p><p style="text-align: justify;">We studied the distribution of soils and produced a 1/25 000 soil map showing four main soil scapes and 11 soil maping units. The four main soil scapes were : a plateau, mainly characterised by the presence of swelling clays ; a large area (south and west) made of filtering sands on underlying more clayey materials ; the lower terraces with deep sandy soils ; and areas of immature soils from recent colluvial or alluvial origin. The soil survey pointed out the great variability of soils within the Pomerol vineyard. The textural properties exhibited a very broad range from very sandy to heavy clayey ones, with abrupt changes, both laterally and vertically. These various textural changes might induce various water behaviours.</p><p style="text-align: justify;">All basic soil data were stored into a geographical information system. Besides its interest for map production, this computerization enables a better characterization of mapping units variability. Actually, from a soil map user point of view, the range of variation - and even the statistical distribution - of a given parameter is as important as the mean observed value. This study gives an exarnple of spatial output taking into account this variability. These georeferenced data will also allow the overlay with other sources of geographical information.</p>


Virology ◽  
2006 ◽  
Vol 356 (1-2) ◽  
pp. 155-164 ◽  
Author(s):  
Claire Marie Filone ◽  
Mark Heise ◽  
Robert W. Doms ◽  
Andrea Bertolotti-Ciarlet

2016 ◽  
Vol 9 (1) ◽  
pp. 200 ◽  
Author(s):  
Alisson Cesar Da Cunha Souza ◽  
Márcio Luiz Da Silva

A identificação e mapeamento dos solos servem como subsidio para planejamentos agrícolas, levantamentos do uso da terra, estudos de terras para irrigação, estudos de preservação, análise e recuperação ambientais, predição de desastres naturais como o monitoramento de processos erosivos, dentre outros. Nesse sentido, os levantamentos e avaliações de solo, para fins agrícolas ou não, ganham importância, pois através deles é possível conhecer as propriedades desse recurso natural, permitindo sua utilização de forma consciente e adequada. O uso de sistemas de informações geográficas tem introduzido novos métodos para o levantamento e mapeamento de solos, por meio de modelagens, a partir da utilização de mapas temáticos básicos e modelos numéricos de terreno ou modelos digitais de elevação, que possibilitam, principalmente, a compreensão das relações entre a paisagem e as classes de solo. Assim, o objetivo deste trabalho foi a realização do levantamento e mapeamento dos solos do município de Inconfidentes - MG, utilizando técnicas de geoprocessamento, e a classificação pedológica até o quarto nível categórico através da generalização, a partir da descrição morfológica e determinações analíticas de perfis de solos representativos. Foi realizada a caracterização da área de estudos, a aquisição e tratamento de dados cartográficos. A descrição morfológica dos perfis foi realizada em pontos previamente definidos, representativos das distintas classes de solo do município. As análises físico-químicas foram realizadas em todas as amostras dos horizontes dos perfis de solos coletados em campo. A generalização do levantamento de solos foi elaborada através do processamento dos dados cartográficos e obtidos em campo, com a utilização do software ArGIS 9.3. O mapeamento pedológico do município foi então o resultado da integração e correlação dos dados altimétricos, da declividade, da rede de drenagem, do canal fluvial, do relevo e da litologia, associados com a caracterização feita em campo e as determinações analíticas. Como resultado, foi possível mapear as áreas de ocorrência de Latossolos, Gleissolos e Cambissolos, as três ordens de solos mais representativos do município, classificando-os até o quarto nível categórico. O uso das ferramentas de geotecnologia se mostrou muito útil para a caracterização das classes pedológicas e posterior generalização, uma vez que através delas foi possível inferir as condições ambientais de formação dos solos e integrá-los com dados de campo e análises laboratoriais.  ABSTRACT The identification and mapping of soils serve as subsidy for agricultural planning, land use surveys, land studies for irrigation, preservation studies, environmental analysis and recovery, prediction of natural disasters such as monitoring erosion, among others. In this sense, soil surveys and assessments, for agricultural purposes or not, become important because through them you can know the properties of this natural resource, allowing its use consciously and appropriately. The use of geographic information systems has introduced new methods to survey and soil mapping, through modeling, from the use of basic thematic maps and numerical terrain models and digital elevation models, which enable, especially, understanding the relationship between the landscape and the soil classes. The objective of this work was the completion of the survey and mapping of soils of city of Inconfidentes - MG, using geoprocessing techniques, and the pedological classification until the fourth categorical level by generalising from the morphological description and analytical profiles determinations representative soil. It was carried out to characterize their field of study, the acquisition and processing of cartographic data. The morphological description of the profiles was held in fixed locations, representative of the different soil classes of the municipality. The physicochemical analyzes were performed on all samples from the horizons of soil profiles collected in the field. Widespread soil survey was prepared by processing the cartographic data obtained in the field and, with the use of ArGIS 9.3 software. The pedological mapping of the municipality was then the result of the integration and correlation of altimetry data, the slope, the drainage network, the river channel, relief and lithology associated with the characterization made in the field and the analytical determinations. As a result, it was possible to map the areas of occurrence of Ferrasols, Cambisols and Gleysols, the three most representative soils of the municipality orders, sorting them until the fourth categorical level. The use of geotechnology tools proved very useful for the characterization of soil classes and subsequent generalization, since through them it was possible to infer the environmental conditions of soil formation and integrate them with field data and laboratory analysis. Keywords: Cambisols, Gleysols, Ferrasols, classification, hillslope.


1989 ◽  
Vol 69 (1) ◽  
pp. 1-16 ◽  
Author(s):  
G. M. COEN ◽  
C. Wang

Vertical saturated hydraulic conductivity, as an important soil characteristic, should be part of the information displayed on soil survey maps. As rigorous measurement techniques are relatively slow and cumbersome, a rapid procedure for estimating vertical saturated hydraulic conductivity of soils using soil morphology was tested for Prairie conditions. Morphological estimates of vertical saturated hydraulic conductivity were compared to field measurements using an air entry permeameter for 36 sites representing 25 soil series. Eighty-three percent of the estimated values were within one saturated hydraulic conductivity class of the mean measured value. It was concluded that morphological observations are sufficiently accurate to allow field characterization of pedons. In Alberta, in Chernozemic areas, management procedures do not appear to modify strongly the saturated hydraulic conductivity. This in turn allows useful predictions of saturated hydraulic conductivity to be related to soil series concepts and therefore allows extrapolation to manageable tracts of land using map unit concepts. Key words: Saturated hydraulic conductivity, soil morphology, Alberta, estimating


2021 ◽  
Vol 21 (12) ◽  
pp. 1003-1006
Author(s):  
Omar Sayed Saeed ◽  
Ayman Hany El-Deeb ◽  
Mohamed Rasheed Gadalla ◽  
Sherif Abdel Ghafar El-Soally ◽  
Hussein Aly Hussein Ahmed

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