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| Registros recuperados: 1.690 | |
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| Costa,Marcondes Lima da; Kern,Dirse Clara; Pinto,Alice Helena Eleotério; Souza,Jorge Raimundo da Trindade. |
| This paper carried out a chemical investigation of archaeological ceramic artifacts found in archaeological sites with Black Earth (ABE) in the Lower Amazon Region at Cachoeira-Porteira, State of Pará, Brazil. The ceramic artifacts, mostly of daily use, belong to Konduri culture (from 900 to 400 years BP). They are constituted of SiO2, Al2O3, Fe2O3, Na2O and P2O5; SiO2 and Al2O3 together add up to 80 % and indicate influence of acid rocks, transformed into clay minerals basically kaolinite. The relative high contents of P2O5 (2.37 % in average) come out as (Al,Fe)-phosphate, an uncommon fact in primitive red ceramics, but found in some roman and egyptian archaeological sites. The contents of the trace elements are similar or below the Earth's crust... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Terra preta; Black earth; Lower Amazon; Soil; Chemistry; Phosphorus; Geochemical Evolution. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672004000300004 |
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| Cordeiro,Thalline Rafhaella Leite; Nguyen,Thuong Thuong Thi; Lima,Diogo Xavier; Silva,Suzana Brito Gomes da; Lima,Catarina Ferreira de; Leitão,Joana D’Arc Alves; Gurgel,Luciana Melo Sartori; Lee,Hyang Burm; Santiago,André Luiz Cabral Monteiro de Azevedo. |
| ABSTRACT During a survey of Mucorales in soil from an upland forest area in Pernambuco, Brazil, two specimens were isolated and characterized based on their morphological, physiological, and molecular data (ITS and LSU rDNA). Phylogenetic analyses of the isolates revealed that the strains URM 8209 and URM 8210 are closely related to species of Absidia. URM 8209 forms conical, subglobose, and strawberry-shaped columellae and the sporangiospores are cylindrical and ellipsoid. URM 8210 produces hemispheric, subglobose, and strawberry-shaped columellae and the sporangiospores are globose, subglobose, ellipsoid, and short cylindrical. Based on evidence obtained through analysis of datasets (LSU and ITS rDNA regions), A. saloaensis sp. nov. (URM 8209) and A.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cunninghamellaceae; Mucoromyceta; RDNA; Soil; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300549 |
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| Oziegbe,Modupe B.; Muoghalu,Joseph I.; Oke,Samson O.. |
| Litterfall, precipitation and nutrient fluxes were investigated in a 0.25 ha plot of a secondary lowland rain forest in Ile-Ife, Nigeria, for a period of one year. The study determined the magnitude of nutrient fluxes through (litterfall, incident rainfall, throughfall and stemflow) and evaluated the relative importance of these components as pathways of nutrient transport to the soil of this forest. There was a significant monthly variation in litterfall and the highest values of the standing crop of litter occurred from November to March. The concentration of elements in both throughfall and stemflow were higher than those of incidence rainfall. Greater quantities of calcium, magnesium, iron, zinc, copper and nitrogen were deposited annually from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrient deposition; Rainfall; Litter; Soil; Secondary forest. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000300020 |
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| Lima,Diogo Xavier; Souza-Motta,Cristina Maria; Lima,Catarina Letícia Ferreira de; Souza,Carlos Alberto Fragoso de; Ribeiro,Jonathan Ramos; Santiago,André Luiz Cabral Monteiro de Azevedo. |
| ABSTRACT As primary decomposers of organic matter, mucoralean fungi have an important ecological role in edaphic systems in the Atlantic Forest. However, there is a knowledge gap regarding how communities of Mucorales are structured in soils of Atlantic Forest areas, and whether these communities are influenced by edaphic attributes in this domain. Thus, the current study aimed to understand the influence of edaphic attributes linked to species richness, abundance and composition of Mucorales in dense ombrophilous forest, ‘tabuleiro’ forest, sandbank and mangrove ecosystems located in Pernambuco, Brazil. Altogether, twenty-three taxa, including seven new records, were reported from soil samples from the ecosystems. Species composition was similar among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Basal fungal order; Diversity; Ecology; Mucorales; Mucoromycota; Mucoromycotina; Soil; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400796 |
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| Korndorfer, Gaspar Henrique; Pereira, Hamilton Seron; Duarte, Ivaniele Nahas; Pinto, Laerte Rocha Neves; Fonseca, Luciano Ferreira da. |
| Thermopotash is a fertilizer with low solubility but has a release level compatible with plant demands. This study aimed to compare the effect of Thermopotash to that of KCl in sugarcane. Field work was conducted during two crop seasons, in a randomised block design. Treatments were applied to the bases of the furrows before planting the sugarcane, arranged in a 2 x 5 factorial design to evaluate two K sources (TK47 - Thermopotash, KCl - potassium chloride) at five levels of K (0, 50, 100, 150, and 200 kg ha-1 K2O). The variables analysed included leaf and soil K, Ca, Mg and Si, soil pH and productivity. The effects of the TK47 fertilizer on sugarcane stalk production were not initially superior to that of the soluble source, but over time, differences... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermopotash; Potassium chloride; Soil; Saccharum spp.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36399 |
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| Korndorfer, Gaspar Henrique; Pereira, Hamilton Seron; Duarte, Ivaniele Nahas; Pinto, Laerte Rocha Neves; Fonseca, Luciano Ferreira da. |
| Thermopotash is a fertilizer with low solubility but has a release level compatible with plant demands. This study aimed to compare the effect of Thermopotash to that of KCl in sugarcane. Field work was conducted during two crop seasons, in a randomised block design. Treatments were applied to the bases of the furrows before planting the sugarcane, arranged in a 2 x 5 factorial design to evaluate two K sources (TK47 - Thermopotash, KCl - potassium chloride) at five levels of K (0, 50, 100, 150, and 200 kg ha-1 K2O). The variables analysed included leaf and soil K, Ca, Mg and Si, soil pH and productivity. The effects of the TK47 fertilizer on sugarcane stalk production were not initially superior to that of the soluble source, but over time, differences... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermopotash; Potassium chloride; Soil; Saccharum spp.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36399 |
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| Leite, Germano Leao Demolin; Lopes, Paulo Sérgio Nascimento; Zanuncio, José Cola; Martins, Cristina de Paula Santos; Moreira, Thiago Marçal Borges; Costa, Renildo Ismael Féliz da. |
| We studied the effect of environmental complexity and plant architecture on the abundance of the Edessa rufomarginata bugs in pastures and cerrado areas and its biology. We observed higher number of bugs on Caryocar brasiliense trees in the cerrado than pasture areas. Bugs were more abundant on leaves and branches rather than fruits. Caryocar brasiliense had greatest fruit production on pasture than in the cerrado areas. The abundance of bugs was correlated positively with aluminum, organic matter, and tree height, but negatively correlated by soil pH. Productivity of C. brasiliense were negatively correlated with aluminum, pH, and number of bugs, but positively correlated with phosphorus and calcium. The number of eggs per clutch was 14.3, their viability... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.00.00-9 environmental diversity; Biology; Pequi; Soil 5.01.02.02-8 pequi; Fruit production; Soil; Stink bug. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26244 |
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| Kuti, Ibrahim Abayomi. |
| Erosion control in Nigeria must be met with high standards in other to attain a sustainable agricultural practice to meet the demand of the growing population in terms of food production. The study is aimed at estimating soil loss using a locally made rainfall simulator and accertaining the performance of the Universal Soil Loss Equation (USLE) model in predicting soil loss in the study location. For this to investigated, experiments were conducted using rainfall simulators, which is readily not available in Nigeria due to its high cost. The drop velocity (DV) of the constructed rainfall simulator was calculated to be 8.101m/s and 2.443 m/s respectively when operated at maximum and minimum intensity. The performance test revealed that the experimental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bare; Rainfall; USLE; Soil; Vegetative. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6719 |
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| Odey, Simon Ogbeche. |
| Abstract: Field experiment was conducted at the teaching and research farm of Cross River University of Technology, Faculty of Agriculture and Forestry, Obubra Campus. The study was aimed at finite modelling of growth and yield of Okra (Abelmoschus esculentus L.) using different tillage systems. Randomised Complete Block Design (RCBD) was used in the field, 1,024m2 with three treatments and three replicates. These treatments were Conventional, Conservative and Zero tillage. Each treatment had three replicates of size 8m x 8m, separated from each other by 2m for manoeuvring of the tractor. Planting of okra and other cultural practices were carried out. Soil samples were collected for analysis in the laboratory. Data on growth parameters and yield of okra... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Finite; Modelling; Growth; Yield; Okra; Tillage Systems; Soil. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7067 |
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| Registros recuperados: 1.690 | |
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