scholarly journals CHARACTERIZATION OF YELLOW LATOSOLS (OXISOLS) OF SERRA DO QUILOMBO, IN PIAUÍ STATE SAVANNA WOODLANDS - BRAZIL

2016 ◽  
Vol 29 (4) ◽  
pp. 832-840 ◽  
Author(s):  
ROSSANNA BARBOSA PRAGANA ◽  
VALDOMIRO SEVERINO DE SOUZA JUNIOR ◽  
REGIANA DOS SANTOS MOURA ◽  
JORDÂNIA MEDEIROS SOARES
Keyword(s):  
Soil Classification ◽  
Economic Importance ◽  
Native Vegetation ◽  
Soil Profiles ◽  
Physical Chemical ◽  
Great Economic Importance ◽  
Geological Formation ◽  
Source Materials ◽  
State Area

ABSTRACT The savanna woodlands of Piauí state has great economic importance since it is an area for agricultural expansion, being the fourth most important of Brazil and the first from Brazilian Northeastern. The area accounts for 5.9% of the Brazilian savanna woodlands and 36.9% of the Northeastern savanna, covering 46% of the Piauí state area, in a total of 11.5 million hectares. The goal of this research was to study pedoenvironments of Serra do Quilombo region, which is in Piauí state savanna, as well as identifying existing soil classes, according to the Brazilian System of Soil Classification - SiBCS. Soil identification consisted in characterizing soil profiles along a transect, assessing in-field conditions and collecting soil samples, in areas of native vegetation. The samples were gathered from three distinct points, being two at the edges and one at the center of the plateau. Soil analyses were carried out with samples collected from each horizon through trench digging up to a 2-m depth. Morphological, physical, chemical and mineralogical characterizations were performed for each soil profile, along with an evaluation of the effect of pedogenic factors on their formation and development. All soils under study were formed with source materials of the same geological formation; however, each rock has a distinct contribution to the process, involving sandstones and shales. The characteristics observed in the soil from Serra do Quilombo have no difference from the pattern found in the Brazilian plateaus, and soil profiles were classified as dystrophic clayey Yellow Latosols (Oxisols), according to the SiBCS.

Pedometric tools for classification of southwestern Amazonian soils: A quali-quantitative interpretation incorporating visible-near infrared spectroscopy

2022 ◽  
pp. 096703352110618
Author(s):  
Orlando CH Tavares ◽  
Tiago R Tavares ◽  
Carlos R Pinheiro Junior ◽  
Luciélio M da Silva ◽  
Paulo GS Wadt ◽  
...  
Keyword(s):  
Near Infrared ◽  
Environmental Variability ◽  
Diffuse Reflectance Spectroscopy ◽  
Soil Classification ◽  
R Package ◽  
Chemical Components ◽  
Soil Profiles ◽  
Wide Range

The southwestern region of the Amazon has great environmental variability, presents a great complexity of pedoenvironments due to its rich variability of geological and geomorphological environments, as well as for being a transition region with other two Brazilian biomes. In this study, the use of pedometric tools (the Algorithms for Quantitative Pedology (AQP) R package and diffuse reflectance spectroscopy) was evaluated for the characterization of 15 soil profiles in southwestern Amazon. The AQP statistical package—which evaluates the soil in-depth based on slicing functions—indicated a wide range of variation in soil attributes, especially in the superficial horizons. In addition, the results obtained in the similarity analysis corroborated with the description of physical, chemical components and oxide contents in-depth, aiding the classification of soil profiles. The in-depth characterization of visible-near infrared spectra allowed inference of the pedogenetic processes of some profiles, setting precedents for future work aiming to establish analytical strategies for soil classification in southwestern Amazon based on spectral data.

scholarly journals Pedon Characterization in the Caatinga Biome Area in Chapada Apodi, RN, Brazil

2020 ◽  
Vol 12 (9) ◽  
pp. 138 ◽  
Author(s):  
Francisca Elisângela Maniçoba ◽  
Francisco Gonçalo Filho ◽  
Lunara G. da S. Rêgo ◽  
Carolina M. M. Souza ◽  
Ana Carla Rodrigues da Silva ◽  
...  
Keyword(s):  
Classification System ◽  
Rio Grande ◽  
Soil Classification ◽  
Soil Profiles ◽  
Agricultural Activity ◽  
Physical Chemical ◽  
Caatinga Biome

The Apodi Plateau is a Brazilian with important agricultural activity, which is located between the states of Ceará and Rio Grande do Norte, in an area of the Caatinga biome. Therefore, this work was developed to characterize the morphological, physical, chemical and mineralogical attributes of soil profiles of this region. For this purpose, trenches were open in three areas in the Tabuleiro Grande Settlement Project, in the municipality of Apodi, RN, Brazil. The profiles were described in the field and samples of the horizons were collected for physical, chemical and mineralogical analyzes. The profiles were classified up to the fourth categorical level and correlated with Soil Taxonomy.According to the Brazilian Soil Classification System, the soils studied were Vertissolo Háplico Órtico chernossólico (Mollisols), Chernossolo Rêndzico Petrocálcico típico (Mollisols) e Vertissolo Háplico Órtico chernossólico (Vertisols).

scholarly journals PALE SOILS ON CARBONATE-FREE DEPOSITS IN CENTRAL SIBERIA AND THEIR TAXONOMIC POSITION IN THE SOIL CLASSIFICATION OF RUSSIA

2015 ◽  
pp. 29-50 ◽  
Author(s):  
T. V. Ananko ◽  
M. I. Gerasimova ◽  
D. E. Konyushkov
Keyword(s):  
Soil Cover ◽  
Analytical Data ◽  
Chemical Properties ◽  
Acid Soils ◽  
Soil Classification ◽  
Soil Profiles ◽  
New Classification ◽  
Taxonomic Level ◽  
Physical Chemical

Based upon a comprehensive analysis of detailed descriptions of soil profiles and analytical data obtained by I. Sokolov, V. Zolnikov, L. Yelovskaya and other researchers, as well as upon data on the soil-forming factors, an attempt is made to determine the taxonomic level of pale undifferentiated neutral and slightly acid soils derived from carbonate-free deposits in the new classification system of Russian soils (versions 2004, 2008). The above group of soils is not uniform. According to their diagnostic morphological and physical-chemical properties the loamy permafrost-affected soils with ice-rich permafrost should be placed in the order of cryometamorphic or iron-metamorphic soils. The loamy sandy soils with dry permafrost may be placed in the same order. The soils with a shallow profile (< 30 cm) on hard parent rock should be qualified as members of the order of lithozems. The specific features of these soils make it possible to suggest new elements to the soil classification. A subtype of pale-metamorphized soils is offered to recognize the types of rzhavozems and raw-humus rzhavozems as the soils transitional to the pale soils. This suggestion is aimed at harmonization of a variety of ideas on the genesis, conditions for the development and nomenclature of soils, which permits us to give a more complete and reliable perception of the soil cover in the Central Siberian plateau.

scholarly journals Assessing diversity among traditional Greek and foreign eggplant cultivars using molecular markers and morphometrical descriptors

2016 ◽  
Vol 14 (4) ◽  
pp. e0710 ◽  
Author(s):  
Antonios A. Augustinos ◽  
Constantinos Petropoulos ◽  
Vassiliki Karasoulou ◽  
Fotios Bletsos ◽  
Vasilis Papasotiropoulos
Keyword(s):  
Molecular Markers ◽  
Plant Material ◽  
Economic Importance ◽  
Diagnostic Tools ◽  
Vegetable Crop ◽  
Morphological Descriptors ◽  
Great Economic Importance ◽  
Domestication Selection ◽  
History Of

Eggplant is a widely cultivated vegetable crop of great economic importance. Its long lasting history of domestication, selection and breeding has led to the development of numerous cultivars with variable traits. In the present study, we assessed the diversity levels within and among eleven Greek and foreign cultivars, using 22 morphological descriptors and two different classes of molecular markers (retrotransposon microsatellite amplified polymorphism-REMAP markers and nuclear microsatellites). Our results, in accordance with other studies in the field showed: a) the limited levels of genetic polymorphism within the cultivars; b) the high morphological and genetic divergence existing among them as indicated by the genetic distance values calculated, which could be attributed to selection, inbreeding and bottleneck effects; and c) the lack of concordance among morphological descriptors and molecular markers. Despite these, our analysis showed that the utilization of combinations of markers is an effective method for the characterization of plant material providing also useful diagnostic tools for the identification and authentication of the selected Greek cultivars.

scholarly journals PEDOGENESIS AND SOIL CLASSIFICATION OF AN EXPERIMENTAL FARM IN MOSSORÓ, STATE OF RIO GRANDE DO NORTE, BRAZIL

2016 ◽  
Vol 29 (4) ◽  
pp. 1036-1042 ◽  
Author(s):  
LUNARA GLEIKA DA SILVA RÊGO ◽  
CAROLINA MALALA MARTINS ◽  
EULENE FRANCISCO DA SILVA ◽  
JÉSSIA JULIANA ALVES DA SILVA ◽  
REBECA NAIRONY DA SILVA LIMA
Keyword(s):  
Rio Grande ◽  
Soil Classification ◽  
Soil Types ◽  
Soil Profiles ◽  
Mineralogical Analysis ◽  
Parent Materials ◽  
Physical Chemical ◽  
Determining Factors ◽  
Pedogenic Processes

ABSTRACT The Rafael Fernandes experimental farm is located in the Alagoinha district, northwest of Mossoró, State of Rio Grande do Norte, Brazil, over two pedogenic formations of different edaphic characteristics, thus needing a more detailed description of its soil types, since this area hosts several experimental fields for researches on agriculture. The objective of this work was to characterize the morphological, physical, chemical and mineralogical features of the most representative soils of this farm, in order to understand its pedogenesis and define its classifications. The whole area was surveyed in order to assess its more representative pedogenic formations. Three soil profiles were classified and described, from which samples were collected in all horizons for physical, chemical and mineralogical analysis. The parent materials and the relief were the determining factors for pedogenic processes of desilication, podzolization and laterization, generating the three main soil types of the area, which were classified up to the 4th categorical level and described as: Typic Rhodustults (P1), Rhodic Haplustox (P2) and Typic Plinthustalfs (P3).

scholarly journals Chemical, physical and mineralogical attributes of the soils of the Sertanejo pediplain in the sisal-growing areas of the semiarid Bahia

2019 ◽  
Vol 40 (1) ◽  
pp. 17
Author(s):  
José Augusto Amorim Silva do Sacramento ◽  
Jorge Antonio Gonzada Santos ◽  
Oldair Vinhas Costa ◽  
Léo Jakson da Silva Moreira ◽  
Alide Mitsue Watanabe Cova ◽  
...  
Keyword(s):  
Survey Data ◽  
Clay Fraction ◽  
Semiarid Region ◽  
Soil Profiles ◽  
Soil Characterization ◽  
Physical Chemical ◽  
Mineralogical Properties ◽  
Growing Region

Information and available knowledge of the soils of the Sertanejo pediplain are relatively scarce and restricted to survey data. Researches about soil characterization and classification contributes to the knowledge of different soil orders within a region and allows information to be obtained systemically based on the physical, chemical, and mineralogical properties of the soil. This study aimed to evaluate the genesis of the Sertanejo pediplain soils, through the characterization of the chemical and mineralogical properties and classification of the soils of the sisal-growing region. Five soil profiles located in Araci, Retirolândia, St. Dominic, and Valente, cities located in the sisal-growing areas of the Bahia semiarid region, were studied, described morphologically, and analyzed for chemical (pH H2O and KCl, Ca2+, Mg2+, K+, Na+, Al3+, H+ + Al3+, P, and TOC) and mineralogical attributes. Most evaluated soil classes were formed by lithological discontinuity of material. The main processes involved in the formation of such soil classes were: cumulization, accretion, and lessivage. The mineralogy of the clay fraction observed was complex and included a variety of minerals, with a predominance of kaolinite and bayerite. In addition, we also found goethite and illite in most of the studied profiles, both in the sediment, horizons P1 C2, and in the crystalline horizon P1 Cr, P2 Bi, P3 2Cr, and P5 Bi. The soils were classified up to the fourth category level, as Entisol Eutrophic Inceptisol (RRE), Alfisols Haplic typical Eutrophic (SXE), and Inceptisols Ta Eutrophic vertissólico (CXve).

Characterization of the City of Red Clay Apodi-RN

2012 ◽  
Vol 727-728 ◽  
pp. 837-843 ◽  
Author(s):  
Flanelson M. Monteiro ◽  
Tércio G. Machado ◽  
José Sousa ◽  
Eiji Harima ◽  
Samara M. Valcacer ◽  
...  
Keyword(s):  
Ceramic Industry ◽  
Rio Grande ◽  
Linear Shrinkage ◽  
Economic Importance ◽  
Raw Material ◽  
Red Clay ◽  
Great Economic Importance ◽  
The City

Ceramic products made from red clay to move the economy of Rio Grande do Norte. Among the most common ones are outstanding bricks, tiles and slabs in different sizes and shapes. In perspective to seek products with good quality in the ceramic industry, the characterization of the raw material is essential for obtaining an excite end product. The municipality of Apodi located in the Upper West Rio Grande do Norte has the ceramic industry as a sector of great economic importance in the site. However the absence of technology for characterization of the clays found in the region is the major problem for local entrepreneurs. The objective this study is to characterize the red clay one of the ceramics used by the municipality of Apodi-RN. The procedure will be done through the testing of Plasticity, Liquidity, linear shrinkage, absorption water, porosity, XRD and EDX.

scholarly journals Morphological, biochemical, and molecular characterization of Meloidogyne spp. populations from Brazilian soybean production regions

2017 ◽  
Vol 47 (5) ◽  
Author(s):  
Camilla Martins de Oliveira ◽  
Ismail Teodoro Souza Junior ◽  
Jerônimo Vieira de Araújo Filho ◽  
Marcos Augusto de Freitas ◽  
Mara Rúbia da Rocha ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Nematode Species ◽  
Economic Importance ◽  
Root Knot Nematode ◽  
Mato Grosso ◽  
Great Economic Importance ◽  
Meloidogyne Spp ◽  
Perineal Region ◽  
Mixed Populations

ABSTRACT: Soybean is a commodity of great economic importance worldwide, particularly in Brazil, world’s second largest producer. Nematodes, especially those of the Meloidogyne genus, severely limit productivity. Identification of nematode species is important for effective soybean management. Here, 26 populations of root-knot nematode (Meloidogyne spp.) from 15 municipalities in the states of Bahia, Mato Grosso, Goias, and Minas Gerais were characterized based on the morphology of the female perineal region, esterase profile, and identification based on amplification of specific regions of the population genome. Among the Meloidogyne spp. populations obtained, M. incognita and M. javanica, were identified. No mixed populations were present in the samples. Diagnosis based on molecular analysis was shown to be reliable and the fastest for characterization of nematode populations compared to other methods analyzed.

scholarly journals Characterization of Two Immunodominant Antigenic Peptides in NSP2 of PRRSV-2 and Generation of a Marker PRRSV Strain Based on the Peptides

2021 ◽  
Author(s):  
Dong-Yan Li ◽  
Xing-Yang Cui ◽  
Xin-Yi Huang ◽  
Yue Hu ◽  
Xiao-Xiao Tian ◽  
...  
Keyword(s):  
Infectious Clone ◽  
Economic Importance ◽  
Deletion Mutants ◽  
Antigenic Peptides ◽  
Structural Protein ◽  
Prrs Virus ◽  
Great Economic Importance ◽  
Animal Remains ◽  
Prrsv Strain

Abstract Porcine reproductive and respiratory syndrome (PRRS) is a widespread disease with great economic importance in the pig industry. Although vaccines against the PRRS virus (PRRSV) have been employed for more than 20 years, differentiating infected from vaccinated animal remains challenging. In this study, all 907 non-structural protein 2 (NSP2) full-length sequences of PRRSV-2 available from GenBank were aligned. Two peptides, at positions 562–627 (m1B) and 749–813 (m2B) of NSP2, were selected, and their potential for use in differential diagnosis was assessed. Both m1B and m2B were recognized by PRRSV-positive pig serum in peptide-coated enzyme-linked immunosorbent assays. Further epitope identification yielded five overlapping short peptides for the immunodominant regions of m1B and m2B. Using the infectious clone of PRRSV HuN4-F112 as a template, the deletion mutants rHuN4-F112-m1B, rHuN4-F112-m2B, and rHuN4-F112-C5-m1B-m2B were generated and successfully rescued in Marc-145 cells. Growth kinetics revealed that deletion of m1B and m2B did not significantly affect virus replication. Hence, m1B and m2B show potential as molecular markers for developing a PRRSV vaccine.

Schwingungsüberlagertes Axialformen/Superimposed Oscillated Axial Forming

2020 ◽  
Vol 110 (11-12) ◽  
pp. 838-843
Author(s):  
Philipp Müller ◽  
Bernd-Arno Behrens ◽  
Sven Hübner ◽  
Hendrik Vogt ◽  
Daniel Rosenbusch ◽  
...  
Keyword(s):  
Surface Quality ◽  
Economic Importance ◽  
Combined Effect ◽  
Wird Eine ◽  
Forming Force ◽  
Forming Process ◽  
Forming Technology ◽  
Great Economic Importance ◽  
Gear Geometry

Techniken zur Steigerung der Formgebungsgrenzen in der Umformtechnik sind von hoher wirtschaftlicher Bedeutung. In dieser Arbeit wird eine Schwingungsüberlagerung im Krafthauptfluss eines Axialformprozesses zur Ausprägung einer Verzahnungsgeometrie untersucht. Die Auswirkungen der Schwingung auf die erzielbare Ausfüllung der Zahnkavitäten werden analysiert sowie die Parameter Schmierung und Oberflächengüte der Halbzeuge in ihrer kombinierten Wirkung untersucht. Es konnte eine Reduzierung der mittleren Umformkraft sowie eine Erhöhung der Formfüllung festgestellt werden. Techniques for extending the production limits in forming technology are of great economic importance. In this research, a superimposed oscillation in the main force flow of an axial forming process to form an axial gear geometry is investigated. The effects of the superimposed oscillation on the achievable form-filling of the tooth cavities are analyzed and the parameters lubrication and surface quality of the semi-finished products are investigated in their combined effect. A reduction of the averaged forming force as well as an increase of the form-filling could be achieved.

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