Changes in soil profile hydraulic properties and porosity as affected by deep tillage soil preparation and Brachiaria grass intercropping in a recent coffee plantation on a naturally dense Inceptisol

A field study was conducted to evaluate moisture storage in soil profile under four tillage-residue management practices namely conventional tillage, no-tillage without residue, no-tillage with residue and deep tillage along with three irrigation regime based on IW/PAN-E ratio 1.2, 0.9 and 0.6 in maize with three replications in split plot design. Significant differences were observed in steady state infiltration rate and cumulative infiltration among different land management practices with maximum value in deep tillage (4.9 cm hr-1 and 33.1 cm) followed by no tillage with residue (4.1cm hr-1 and 28.6 cm), no tillage without residue (4.0 cm hr-1 and 23.0 cm) and conventional tillage (2.8 cm hr-1 and 19.4 cm), respectively. The highest mean weight diameter and water stable aggregates were found under no tillage with residue (0.64 mm and 49.7%) and lowest under deep tillage (0.3 mm and 21.8%), respectively. Higher volumetric soil water content and soil profile moisture storage were recorded under no tillage with residue at different days after sowing. Among different tillage-residue management practices, maximum leaf area index and relative leaf water content were observed in no-tillage with residue. Under moisture stress conditions, no-tillage with residue retention was suitable land management option for reducing evaporation losses and enhancing moisture storage in the soil profile.

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Effects of compaction on soil hydraulic properties, penetration resistance and water flow patterns at the soil profile scale

Soil Use and Management ◽

10.1111/sum.12481 ◽

2019 ◽

Vol 35 (3) ◽

pp. 367-377 ◽

Cited By ~ 1

Author(s):

Mona Mossadeghi‐Björklund ◽

Nicholas Jarvis ◽

Mats Larsbo ◽

Johannes Forkman ◽

Thomas Keller

Keyword(s):

Water Flow ◽

Soil Profile ◽

Hydraulic Properties ◽

Penetration Resistance ◽

Flow Patterns ◽

Soil Hydraulic Properties ◽

Soil Hydraulic

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PERFILÔMETRO DE BARRA CORREDIÇA: AVALIAÇÃO DE METODOLOGIA PARA ANÁLISE DA RUGOSIDADE DO SOLO

ENERGIA NA AGRICULTURA ◽

10.17224/energagric.2019v34n4p471-478 ◽

2019 ◽

Vol 34 (4) ◽

pp. 471-478

Author(s):

Darlan Ferreira Borges ◽

Felipe Augusto Reis Gonçalves ◽

João de Deus Godinho Junior ◽

Caio Fernando Eckhardt Souza ◽

Alberto Carvalho Filho

Keyword(s):

Soil Profile ◽

Rio Grande ◽

Field Work ◽

Minas Gerais ◽

Average Thickness ◽

Randomized Design ◽

Roughness Index ◽

Before And After ◽

Soil Preparation ◽

Completely Randomized Design

PERFILÔMETRO DE BARRA CORREDIÇA: AVALIAÇÃO DE METODOLOGIA PARA ANÁLISE DA RUGOSIDADE DO SOLO DARLAN FERREIRA BORGES1, FELIPE AUGUSTO REIS GONÇALVES2, JOÃO DE DEUS GODINHO JUNIOR3, CAIO FERNANDO ECKHARDT SOUZA4, ALBERTO CARVALHO FILHO5 1 Departamento de Ciências Agronômicas e Florestais, Universidade Federal Rural do Semi-Árido - UFERSA, Rua Francisco Mota, 572 - Presidente Costa e Silva, CEP: 59625-900, Mossoró – Rio Grande do Norte, Brasil, [email protected]. 2 Instituto de Ciências Agrárias, Universidade Federal de Viçosa, Rodovia MG-230 - Km 7, Zona Rural, CEP: 38810-000, Rio Paranaíba – Minas Gerais, Brasil, [email protected]. 3 Departamento de Engenharia Rural, Universidade Estadual Paulista, Via de Acesso Professor Paulo Donato Castelane, S/N - Vila Industrial, CEP: 14884-900, Jaboticabal – São Paulo, Brasil, [email protected]. 4 Instituto de Ciências Agrárias, Universidade Federal de Viçosa, Rodovia MG-230 - Km 7, Zona Rural, CEP: 38810-000, Rio Paranaíba – Minas Gerais, Brasil, [email protected]. 5 Instituto de Ciências Agrárias, Universidade Federal de Viçosa, Rodovia MG-230 - Km 7, Zona Rural, CEP: 38810-000, Rio Paranaíba – Minas Gerais, Brasil, [email protected]. RESUMO: Com o objetivo de analisar e discriminar métodos de avaliação do perfil mobilizado do solo através de perfilômetro de barra corrediça, realizou-se um trabalho em campo, sob latossolo vermelho-amarelo distrófico (LVAd), montado no esquema de parcelas subdivididas no espaço. Procedeu-se em delineamento inteiramente ao acaso, com quatro repetições. As parcelas constaram do preparo primário do solo, aração e gradagem, e as subparcelas de dois perfilômetros de barra: 1000 mm (Perf 1) e 2500 mm (Perf 2) de comprimento. Avaliou-se a área mobilizada do solo e a área de elevação, referenciando-se a superfície natural do solo em pré-preparo, a espessura média da camada mobilizada, o empolamento do solo, o índice de rugosidade antes e após o preparo e a modificação da rugosidade. Observou-se diferença entre os aparelhos para todas variáveis. Ocorreu maior expressividade dos dados com o Perf 2 para os tipos de preparo avaliados. Os dados obtidos pelo Perf 1 subestimaram ou superestimaram os valores das variáveis analisadas. Concluiu-se que, para as condições estudadas, indica-se a tomada de 200 pontos por parcela, quando utilizado perfilômetro de barra corrediça de 2500 mm de comprimento, para estudo do perfil do solo e determinação de parâmetros relacionados a essa característica. Palavras-chave: mobilização do solo, área de elevação, área mobilizada, empolamento. MICRORELIEF METER: EVALUATION OF METHODOLOGY FOR ANALYSIS OF ROUGHNESS OF SOIL ABSTRACT: The aim of this study is analyzing and discriminating methods of soil mobilized profile evaluation through a sliding bar profilometer. A field work was carried out under distrofic red-yellow latosolo (LVAd), observed in plots subdivided in space. A completely randomized design was used with four repetitions. The plots consisted of the primary soil preparation, plowing and harrowing, and the subplots of two bar profilometers: 1000 mm (Perf 1) and 2500 mm (Perf 2) in length. The soil mobilization and lifting area were evaluated, with reference to the natural surface of the pre-tillage soil, average thickness of the mobilized layer, soil puffiness, roughness index before and after the preparation, and roughness modification. It was observed a difference between the devices for all variables. There were higher data with Perf 2 for the types of preparation evaluated. The data obtained by Perf 1 underestimated or overestimated the values of analyzed variables. It was concluded that for these studied conditions, it is indicated the taking of 200 points per plot, when using a 2500 mm long slide bar profilometer, to study the soil profile and to determine parameters related to this characteristic. Keywords: soil mobilization, lifting area, mobilized area, blistering.

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Single and dual-permeability models of chlorotoluron transport in the soil profile

Plant Soil and Environment ◽

10.17221/3591-pse ◽

2011 ◽

Vol 51 (No, 7) ◽

pp. 310-315 ◽

Cited By ~ 8

Author(s):

R. Kodešová ◽

J. Kozák ◽

J. Šimůnek ◽

O. Vacek

Keyword(s):

Solute Transport ◽

Soil Profile ◽

Hydraulic Properties ◽

Preferential Flow ◽

Water Movement ◽

Application Rate ◽

Transport Parameters ◽

Soil Hydraulic Properties ◽

Permeability Model ◽

Herbicide Transport

This study presents the transport of chlorotoluron in the soil profile under field conditions. The herbicide Syncuran was applied on a plot (4 m˛) using an application rate of 2.5 kg/ha of active ingredient. Soil samples were taken after 119 days to study the residual chlorotoluron distribution in the soil profile. The single and dual-permeability models in HYDRUS-1D (&Scaron;imůnek et al. 2003) were used to simulate water movement and herbicide transport in the soil profile. Soil hydraulic properties and their variability were previously studied by Kutílek et al. (1989). The solute transport parameters, such as the adsorption isotherm and the degradation rate, were determined in the laboratory. Since the solute transport in the field was probably affected by preferential flow, the chlorotoluron distribution in the soil profile calculated using the single-permeability model had a different character than observed chlorotoluron concentrations. The chlorotoluron distribution within depth calculated using the dual-permeability model was closer to the observed behavior of chlorotoluron. While the herbicide did not reach a depth of 8 cm for the single-porosity system, in the case of the dual-permeability model the solute moved to the depth of 60 cm. The dual-permeability model significantly improved correspondence between calculated and observed herbicide concentrations.

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The value of primary tillage in the development of plant trees and shrubs

Forestry Engineering Journal ◽

10.12737/11989 ◽

2015 ◽

Vol 5 (2) ◽

pp. 149-158

Keyword(s):

Soil Moisture ◽

Soil Layer ◽

Low Permeability ◽

Deep Tillage ◽

Primary Tillage ◽

Soil Preparation ◽

Trees And Shrubs

Are considered indicators that define the quality of soil preparation, and requirements for the degree of crumbling, fluff and lumpy soil layer during the outbreak, depending on soil moisture, rendering crucial. Research has shown that in the soil-ing have low permeability and low supply of humus, essential to increase the absorbency of creating a stock of moisture in the lower layers becomes deep tillage (60-70 cm) leaving the upper fertile layer, the degree of crumbling ko- torogo should be within at least 60 %.

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