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| Ortigara,Cícero; Moraes,Moacir Tuzzin de; Debiasi,Henrique; Silva,Vanderlei Rodrigues da; Franchini,Julio Cezar; Luz,Felipe Bonini da. |
| Estimation of soil load-bearing capacity from mathematical models that relate preconsolidation pressure (σp) to mechanical resistance to penetration (PR) and gravimetric soil water content (U) is important for defining strategies to prevent compaction of agricultural soils. Our objective was therefore to model the σp and compression index (CI) according to the PR (with an impact penetrometer in the field and a static penetrometer inserted at a constant rate in the laboratory) and U in a Rhodic Eutrudox. The experiment consisted of six treatments: no-tillage system (NT); NT with chiseling; and NT with additional compaction by combine traffic (passing 4, 8, 10, and 20 times). Soil bulk density, total porosity, PR (in field and laboratory measurements), U,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhodic Eutrudox; No-tillage system; Machinery traffic; Soil compaction. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401036 |
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| Arcoverde,Sálvio N. S.; Souza,Cristiano M. A. de; Rafull,Leidy Z. L.; Cortez,Jorge W.; Orlando,Roberto C.. |
| ABSTRACT Machinery traffic intensification has been recurrent in intensive agriculture in annual crops, which may lead to structural soil degradation and, consequently, a reduction of its productive capacity. Therefore, this study aimed to assess the influence of tractor traffic intensification on soil physical attributes and soybean yield components. The study was performed in an Oxisol under no-tillage for 10 years, using a randomized block design with five tractor traffic intensities (0, 2, 4, 6, 8, and 12 passes) and five replications. Density, porosity, macroporosity, microporosity, and penetration resistance were assessed in the soil and stem diameter, number of pods per plant, number of grains per pod, grain weight per plant, thousand-grain weight,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil compaction; Yield components; Shoot; Soil penetration resistance; Machinery traffic. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000100113 |
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| Cortez,Jorge W.; Lopes,Hélio L.; Coelho,Daniela S.; Arcoverde,Sálvio N. S.. |
| Since the advent of mechanized farming and intensive use of agricultural machinery and implements on the properties, the soil began to receive greater load of machinery traffic, which can cause increased soil compaction. The aim of this study was to evaluate the spatial variability of soil mechanical resistance to penetration (RP) in the layers of 0.00-0.10, 0.10-0.20, 0.20-0.30 and 0.30-0.40m, using geostatistics in an area cultivated with mango in Haplic Vertisol of the northeastern semi-arid, with mobile unit equipped with electronic penetrometer. The RP data was collected in 56 points from an area of 3 ha, and random soil samples were collected to determine the soil moisture and texture. For RP data analysis we used descriptive statistics and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil compaction; Machinery traffic; Agricultural mechanization. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000200006 |
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