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| Registros recuperados: 174 | |
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| Assis,Paula Camylla Ramos; Stone,Luís Fernando; Silveira,André Luís Rodrigues da; Oliveira,Janaína de Moura; Wruck,Flávio Jesus; Madari,Beáta Emöke. |
| ABSTRACT Currently, agricultural productivity and sustainable development are the desired bases for the creation of production systems. Farming for greater production and the efficient use of soil resources are at the core of modern systems. However, the way in which agricultural management and practices can change soil quality has become increasingly important. The aim of this study was to detect changes in soil biological properties caused by implementation of the integrated crop-livestock-forest system (iCLF) and to identify the properties suitable for detecting changes in soil biological quality. Soil samples were collected from the 0.00-0.10 m layer in Nova Canaã do Norte, MT, Brazil, and Cachoeira Dourada, GO, Brazil, in areas of the iCLF with 1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil biological quality; Soil management; Degraded pasture. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100415 |
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| Albuquerque,Abel W. de; Sá,Leopoldo de A.; Rodrigues,William A. R.; Moura,Adriano B.; Oliveira Filho,Manoel dos S.. |
| ABSTRACT This study aimed to evaluate sugarcane growth and its agricultural and industrial yield influenced by phosphorus (P) sources and forms of application. The experiment was carried out at the Paisa Sugar Mill, in Penedo-AL, Brazil, from February 2012 to February 2013. The adopted experimental design was a randomized block in a factorial arrangement, with four replicates. The treatments consisted of five doses of triple superphosphate applied in the planting furrow (0, 50, 100, 150 and 200 kg ha-1 of P2O5), and three doses of Bayóvar reactive phosphate rock (0, 100 and 200 kg ha-1 of P2O5) applied in the total area. Phosphorus applied in the planting furrow improved sugarcane quality through the reduction of fiber and increases in purity, corrected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphorus fertilizer; Soil management; Agroindustrial yield. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100029 |
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| Timm,Luis C.; Oliveira,Julio C. M. de; Tominaga,Tania T.; Cássaro,Fabio A. M.; Reichardt,Klaus; Bacchi,Osny O. S.. |
| The quantification of soil water balance components was conducted in a sugarcane (Saccharum officinarum L.) field differently managed, as well as a qualitative analysis of the methodologies used for their estimation. The study was conducted in randomized block experiment with four replicates and three treatments: bare soil, mulched soil using trash left on the soil surface after harvest, and soil with burnt trash. The soil was classified as a Rhodic Kandiudalf, locally called 'Terra Roxa Estruturada', the experimental area having a slope of 7.4%. Run-off, soil water fluxes at the lower soil volume limit, and soil water storage changes were not affected by the different soil management practices. Furthermore, it was found that the evaluation of run-off and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water balance; Soil physical properties; Soil management. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662002000100011 |
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| Balota,Elcio L.; Machineski,Oswaldo; Matos,Maria A.. |
| ABSTRACT The objective of this work was to evaluate the changes in microbial biomass C, N and P due to the application of pig slurry under different soil tillage systems. The experiment was established in a clayey Oxisol, Eutrophic Red Latossol in Palotina, PR. Different quantities of pig slurry (0, 30, 60 and 120 m3 ha-1 year-1) were applied to the soil prior to the summer and winter crop season under conventional tillage (CT) and no tillage (NT), in three replicates. The area was cultivated with soybean (Glycine max L.) or maize (Zea mays L.) in the summer and wheat (Triticum sativum Lam.) or oat (Avena sativa L.) in the winter. The soil samples were collected in March and October of 1998 and 1999 at depths of 0-5, 5-10 and 10-20 cm. The soil tillage and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial activity; Swine manure; Soil management; Nutrient cycling. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000500004 |
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| Leiva,Jairo O. R.; Silva,Raimunda A.; Buss,Ricardo N.; França,Victor L.; Souza,Anderson A.; Siqueira,Glécio M.. |
| ABSTRACT Soil resistance to penetration (PR) is an indirect measure of the state of soil compaction. Thus, the objective of this study was to characterize PR in vertical profiles in an area cultivated with sugarcane using multifractal models for different relief units. The experiment was carried out in an Oxisol with a clay texture, with 6.85 ha in the municipality of Coelho Neto (Maranhão state, Brazil), where 60 sampling points were demarcated. The area was divided into four relief units (Type A > 74 m, Type B from 71 to 74 m, Type C from 68 to 71 m and Type D from 65 to 68 m). The PR was measured at the 60 sampling points using an impact penetrometer, and the PR determined in the 0-0.60 m depth layer every 0.01 m. The multifractal analysis was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fractal geometry; Fractal dimension; Singularity spectrum; Geostatistics; Soil management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700538 |
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| Nunes,João A. S.; Bonfim-Silva,Edna M.; Silva,Tonny J. A. da. |
| ABSTRACT Inadequate management of soil and water can cause changes in soil physical characteristics, resulting in lower root development. Thus the objective of the present study was to evaluate the dry matter production of corn roots under combinations of levels of bulk density and water tension in the soil. The experiment was conducted in a greenhouse in a randomized block design, based on a modified central composite design of a 52 fractional factorial scheme, of combinations of bulk densities (1.0, 1.2, 1.4, 1.6 and 1.8 Mg m-3) and water tensions in the soil (10, 20, 30 40 and 50 kPa), resulting in 13 treatments with four replicates. An Oxisol collected in the layer of 0-0.2 m was used. The pots were made of PVC (polyvinyl chloride) tube with compacted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Soil compaction; Soil management. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400357 |
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| Storck,Lindolfo; Kobata,Sarha G. K.; Brum,Betania; Soares,André B.; Modolo,Alcir J.; Assmann,Tangriani S.. |
| ABSTRACT This study aimed to estimate the size of blocks of observations of resistance to penetration, obtained by a motorized digital penetrometer, and the number of blocks with semi-amplitude of the confidence interval between 5 and 20% of the mean penetration resistance, for different soil depth ranges and cone diameters. Data were collected in two contrasting plots of a crop-livestock integration experiment, located in Abelardo Luz, SC, Brazil. Ten blocks were delimited and the resistance to penetration was determined in 20 points spaced by 20 cm, using a motorized digital soil penetrometer. To estimate the mean of resistance to penetration, 12 blocks of four points per experimental plot should be used for a semi-amplitude of the confidence interval... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sample size; Penetration resistance; Grazing pressure; Soil management. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000300250 |
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| Ferreira,Enderson Petrônio de Brito; Santos,Henrique Pereira dos; Costa,Janaina Ribeiro; De-Polli,Helvécio; Rumjanek,Norma Gouvêa. |
| An experiment was carried out under field conditions to assess the effects of soil management (no-tillage- NT and conventional tillage- CT) and crop rotation systems on microbial biomass-C (Cmic), basal soil respiration (BSR), metabolic quotient (qCO2), soil organic carbon content (Corg) and microbial carbon to organic carbon ratio (Cmic/Corg). Soil samples were collected on an area cultivated with wheat as winter crop and soybean as summer crop, both in rotation with vetch, maize and oats. Samples were also collected in a secondary forest used as reference. Data of each management system (NT and CT) were compared to forest area by "t" test (p<0.05) and crop rotations were compared by Tukey test (p<0.05). All data were submitted to multivariate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial biomass; Microbial respiration; Organic matter; Soil management. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902010000200002 |
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| Araújo,Jackson de Lima; Pastori,Patrik Luiz; Gomes,Vânia Felipe Freire; Mendes Filho,Paulo Furtado; Nunes,Luís Alfredo Pinheiro Leal. |
| ABSTRACT The aim of this study was to evaluate the influence of fruit-crop management (mango, guava and coconut) on the composition and distribution of soil arthropods (mesofauna and macrofauna) during seasonal periods in the Curu Valley region of the State of Ceará, Brazil. The study was carried out during the following periods: rainy/dry (July/August 2013), dry (October/ November 2013), dry/rainy (January/February 2014) and rainy (April/May 2014). Pitfall traps were used to capture the arthropods. After sorting, the Shannon-Wiener diversity index and the Pielou evenness index were calculated. Diversity values were compared in pairs using Student's t-test (α = 0.05) in the SAS v 9.0 software (2002). The similarity of the areas and groups was evaluated by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Semi-arid; Edaphic fauna. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400537 |
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| Matsinhe,Daniel Zefanias; Pereira,Silvio Bueno; Oliveira,Rubens Alves de; Assis,Igor Rodrigues de; Oliveira,Reginaldo Miranda. |
| ABSTRACT Irrigation has a great importance in the production of food, and it is responsible for consuming a large part of the water used by human activities. This makes the rational management of water use fundamental for sustainable food production. For this purpose, the determination of bulk density is important and needs to be obtained with the simplest, least onerous methods possible, while maintaining precision and accuracy. Therefore, the objective of this work was to evaluate the use of PVC pipes of different dimensions to determine bulk density. For comparison purposes, the volumetric ring, paraffin clod, beaker and excavation methods were also used. Deformed and undisturbed soil samples of different granulometries were collected at the depths of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water use; Irrigated agriculture; Soil management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100027 |
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| Lima,Julião Soares de Sousa; Silva,Samuel de Assis; Santos,Adilson Almeida dos; Altoé,Marcelo Soares. |
| ABSTRACT Knowledge of the spatial variability of soil attributes is an aid to soil management. The aim of this study was to apply fuzzy logic and geostatistics in defining the spatial variability of soil fertility, in soil cultivated with the rubber tree. Soil samples from the 0-0.20 m and 0.20-0.40 m layers were collected in a stratified random sampling grid, with a shortest distance of 6 m, for a total of 60 points. The chemical attributes were P, K, Ca, Mg, BS, CEC and V. The spatial dependence of the attributes was determined, and the maps were constructed using ordinary kriging interpolation. The interpolated values were transformed into degrees of pertinence (FI), with the lower and upper limits previously defined, using an increasing model. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Map of fertility; Fuzzy logic. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200228 |
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| Guimarães,Claudinei Martins; Costa,Carlos Alexandre Gomes; Carneiro,Leandro Flávio; Assunção,Hildeu Ferreira da. |
| ABSTRACT The technique of Time Domain Reflectometry (TDR) is important in the evaluation of soil moisture due to being an instantaneous method, which is non-destructive, precise and little dependent on environmental factors. However, researchers have emphasised the need for continuous specific calibration for each soil-management situation. The aim of this work therefore, was to evaluate the response of a portable TDR sensor to soil moisture in a Dystroferric Red Latosol in the Cerrado, under three different systems of soil management and at three different depths in the soil profile. To do this, TDR equipment consisting of two rods, each 0.12 m in length, was used for instantaneous measurement of the volumetric water content of the soil. The depths of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil water content; Soil management; Dielectric permittivity; Cropping systems; Time domain reflectrometry.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100001 |
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| Trasar-Cepeda,Carmen; Leirós,Maria Carmen; Gil-Sotres,Fernando. |
| Human activity is one of the main causes of the physical, chemical and biological degradation of soils. This degradation implies a change in soil quality as it involves both a decrease in productivity and changes in the ecological functions of the soil. The objective of the present study was to investigate the effect of soil use on soil biochemical properties, with the aim of providing data that allow assessment of the usefulness of enzymatic activities as indicators of soil quality. In addition to physical and chemical properties, different hydrolase enzymes involved in the C, N, P and S cycles, and other biochemical properties, such as the microbial biomass C and soil basal respiration, were analysed. The results obtained allowed different conclusions to... |
| Tipo: Journal article |
Palavras-chave: Soil enzymes; Soil biochemical properties; Soil use; Soil management; Forest soils; Agricultural soils. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000200007 |
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| Ghiberto,Pablo Javier; Imhoff,Silvia; Libardi,Paulo Leonel; Silva,Álvaro Pires da; Tormena,Cassio Antonio; Pilatti,Miguel Ángel. |
| Indicators synthesizing the state of the structural quality and the function of the porous system are useful for assessing soil production capacity as well as the way it may serve natural ecosystems. This research aimed (i) to determine indicators of the state and function of the porous system, (ii) to use them to derive a global index to characterize the soil physical quality, and iii) to establish a reference pore-size distribution curve for Mollisols from the province of Santa Fe (Argentina). Sixty water retention curves (WRC) of A and B horizons of Mollisols, with clay varying between 119 and 538 g kg−1, organic matter between 5 and 40 g kg−1, and soil bulk density between 1.09 and 1.49 Mg m−3, were used. The indicators measured were: pore size... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water release curve; Silty-loam; Macropore; Soil management. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000200167 |
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| Registros recuperados: 174 | |
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