8 results

Root Distribution of Peach Rootstocks Affected by Soil Compaction and Acidity

Henrique Belmonte Petry, Michael Mazurana, Gilmar Arduíno Bettio Marodin, Renato Levien, Ibanor Anghinoni, Clésio Gianello and, [...]

28/Jun/2016

ABSTRACT Root growth can be limited by physical and chemical conditions of the soil. Compacted and acidic soils, where there is an occurrence of exchangeable Al, constitute barriers to use of the soil by plant roots. The hypothesis of this study was that physical and chemical properties of the inter-row soil of a peach orchard influence the root distribution of different rootstocks. The aim of this study was to describe and register the soil physical and chemical properties and root […]

Soil Properties and Carbon Accumulation in an Integrated Crop-Livestock System Under No-Tillage

Nídia Raquel Costa, Marcelo Andreotti, Keny Samejima Mascarenhas Lopes, Kazuo Leonardo Yokobatake, João Paulo Ferreira, Cristiano Magalhães Pariz, [...]

01/May/2015

In production systems such as the integrated crop-livestock system (ICL) under no-tillage, improvements have been observed in chemical, physical, and biological soil properties. Therefore, we aimed to evaluate the changes in chemical and physical soil properties, as well as carbon (C) accumulation, in an Oxisol under irrigated conditions in the Cerrado (Brazilian tropical savanna) in an ICL system under no-tillage. The experiment was carried during the growing of 2010/2011, 2011/2012, and 2012/2013. A randomized block experimental design with four replications […]

ASPECTS OF THE SILVOPASTORAL SYSTEM CORRELATED WITH PROPERTIES OF A TYPIC QUARTZIPSAMMENT (ENTISOL) IN MATO GROSSO DO SUL, BRAZIL

Adriany Rodrigues Corrêa, Rafael Montanari, Valdemir Antônio Laura, Alex Marcel Melotto, Evelize Nayara Santana da Silva, Douglas Martins Pereira Pellin, [...]

01/Mar/2015

In Brazil, grazing mismanagement may lead to soil and pasture degradation. To impede this process, integrated cropping systems such as silvopasture have been an effective alternative, allied with precision agriculture based on soil mapping for site-specific management. In this study, we aimed to define the soil property that best sheds light on the variability of eucalyptus and forage yield. The experiment was conducted in the 2011/12 crop year in Ribas do Rio Pardo, Mato Grosso do Sul State, Brazil. We […]

Least limiting water range in a typic haplorthox after the first continuous grazing period of brachiaria ruziziensis in integrated crop-livestock system

Jonez Fidalski, Cássio Antonio Tormena, Sérgio José Alves

01/Jun/2013

The least limiting water range (LLWR) is one of the best indicators of soil physical quality in intensive production systems. The objective of this study was to evaluate the physical quality of a Typic Haplorthox by the LLWR after three crop growing seasons and the first year of crop-livestock integration in Xambrê, northwestern Paraná, Brazil. The experiment was established in a randomized block design with three replications. Treatments consisted of four brachiaria heights before grazing (0.10; 0.20; 0.30, and 0.40 […]

Soil compaction and yield of corn hybrids in an oxisol. II – least limiting water range and root system

Onã da Silva Freddi, José Frederico Centurion, Aildson Pereira Duarte, Fernanda Salles Cunha Peres

01/Aug/2009

The objective of this study was to evaluate, under field conditions, in Colina-SP, Brazil, the response of two corn cultivars to six soil compaction levels of an Oxisol regarding the root system development, and to characterize soil compaction by the least limiting water range (LLWR). The experiment was arranged in a randomized complete block design, with strip plots and four replications. The corn hybrids DKB 390 and DAS 2B710 were used. After corn sowing, undisturbed soil samples were collected to determine physical […]

Influence of mechanical load levels on physical properties of a eutric cambisol

Karina Maria Vieira Cavalieri, Álvaro Pires da Silva, Johan Arvidsson, Cássio Antonio Tormena

01/Jun/2009

The objective of this study was to evaluate the effects of different mechanical loads on soil physical properties of a Eutric Cambisol with loam sandy texture. The soil load distribution (kPa) was measured in situ by sensors placed in different soil layers. The soil physical properties evaluated were the bulk density (Ds) and the soil penetration resistance (RP) on sugarbeet (Beta vulgaris L.) row and interrow down to 0.30 m depth. The treatments were: without extra pressure exerted by the […]

Solarization effects on physical, chemical and biological properties of soils

R. Ghini, F.R.A. Patricio, M.D. Souza, C. Sinigaglia, B.C. Barros, M. E. B. M. Lopes, [...]

01/Feb/2003

Solarization is a method for soil disinfestation, taking effect by increased soil temperatures under soil covers of transparent polyethylene sheets during the period of intense solar irradiation. Four field experiments were set up in the state of São Paulo, Brazil (districts of Mogi das Cruzes, Jarinú, Piracicaba and Itatiba), in the years 2000 and 2001, to evaluate the effects of soil solarization on physical, chemical and biological soil properties. Solarization caused a significant reduction in penetration resistance of the evaluated […]

Alterations of the physical properties of a dark-red latosol (typic Acrustox) under different crops

A. Cavenage, M. L. T. Moraes, M. C. Alves, M. A. C. Carvalho, M. L. M. Freitas, S. Buzetti

01/Dec/1999

The present work had the objective to analyze the alterations of the physical properties of a dark-red Latosol (typic acrustox), under different use systems. In 1996, samples of soils were collected, under corn crop, pinus, eucalyptus, pasture, ciliary forest (after 10 years of cultivation), and native cerrado vegetation, in three depths (0,00-0,10; 0,10-0,20, and 0,20-0,40 m), in the experimental station from Faculdade de Engenharia de Ilha Solteira – UNESP, located in Selvíria county (MS). The experimental design was the totally […]