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A STUDY OF THE IMPACT OF LAND USE AND OCCUPATION ON BASIN WATER QUALITY THROUGH MULTIVARIATE STATISTICS REA
Santos,Gilmar O.; Hernandez,Fernando B. T.; Ferraudo,Antonio S.; Vanzela,Luiz S.; Santos,Duílio J. O..
ABSTRACT Without effective actions to improve environmental management, water resources tend to become scarce. Thus, this study aimed to understand the processes influencing the physical, chemical, and biological properties of the water due to land uses and occupation in the Ipê stream basin, in Ilha Solteira - SP (Brazil), regarding the dependence of the analyzed variables. Monitoring of chemical, physical, and biological water quality was performed from 2006 to 2011, and the records of land use and occupation in 2011. A factorial multivariate analysis allowed us to understand that the processes in densely populated areas increased degradation of water by the input of organic loads, yet those of farming areas enhanced the degradation of the chemical and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Factor analysis; Irrigation; Land use and occupation; River basin.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300453
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EFFECTS OF CLAY FRACTION MINERALOGY ON PHYSICAL ATTRIBUTES OF A YELLOW ULTISOL TREATED WITH CHISELING REA
Nogueira,Deise C. S.; Fernandes,Carolina; Souza,Luma C. de; Camargo,Lívia A.; Ferraudo,Antonio S..
ABSTRACT The objective of this study was to evaluate the influence of minerals in the clay fraction on physical attributes of Yellow Ultisol cultivated with sugarcane and prepared with two different treatments: chiseling across the entire area and chiseling only in planting rows. The samples were collected from four layers of soil at eight months after planting. We assessed the texture of the soil, levels of iron extracted by dithionite-citrate-bicarbonate (DCB) and ammonium acid oxalate (AAO), ratio of kaolinite/(kaolinite + gibbsite), soil bulk density, and soil penetration resistance. The first area showed a higher ratio of kaolinite/(kaolinite + gibbsite) and the second area had greater levels of iron extracted by DCB. Levels of iron extracted by DCB...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Iron oxides; Kaolinite; Soil bulk density; Soil penetration resistance.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400433
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Estudo morfométrico comparativo de 58 populações brasileiras de Rotylenchulus reniformis (Nemata: Rotylenchulinae) Trop. Plant Pathol.
Soares,Pedro L. M.; Santos,Jaime M. dos; Ferraudo,Antonio S..
Foram recuperadas 58 populações de Rotylenchulus reniformis de amostras de solo e raízes de diferentes culturas e inoculadas em plantas de algodoeiro (Gossypium hirsutum) cv. COODETEC 402 e de mamona (Ricinus communis), mantidas em vasos de argila em casa de vegetação do Departamento de Fitossanidade da UNESP/FCAV, Campus de Jaboticabal - São Paulo. Foi realizado estudo morfométrico comparativo das populações ao microscópio óptico composto, seguido da ordenação das populações segundo análises multivariadas de agrupamento e de componentes principais. Foram avaliadas 11 variáveis morfométricas em dez fêmeas jovens de cada população e sete variáveis derivadas. A amplitude de variação de caracteres morfométricos em populações brasileiras desse nematóide tais...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Taxionomia; Nematóide reniforme; Análise multivariada; Morfometria.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000400010
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MORPHOGENIC AND STRUCTURAL CHARACTERISTICS OF MARANDU GRASS AFFECTED BY FERTIGATION WITH TREATED SEWAGE EFFLUENT AND CUTTING HEIGHT REA
Dantas,Geffson de F.; Faria,Rogério T. de; Costa,Natã R.; Santos,Gilmar O.; Ferraudo,Antonio S..
ABSTRACT The response of biomass flow components of forage from the interaction between fertigation with wastewater and cutting height during the year is little known. The objective of this work was to verify the responses of morphogenic and structural characteristics of Urochloa brizantha as a function of fertigation application strategies with sewage treatment plant effluent (TSE), complemented with urea (U), associated with harvest with two plant heights during the dry and rainy periods. The forage cutting heights were 30 cm (H1) and 40 cm (H2), and nitrogen fertilization doses were 9.1 (D1), 12.1 (D2), 22.5 (D3), 26.6 (D4), and 34.0 (D5) kg of N per Mg−1 of dry matter (DM) produced, applied by TSE via fertigation, plus 7.5 kg N per Mg−1 of DM produced,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Defoliation; Nitrogen; Water reuse.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600692
Registros recuperados: 4
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