Consulta: subjectFacets:"Compacted layer"
Registros recuperados: 3
Data/hora: 04/06/2024 04:37:42

Soybean Tillage Systems and Physical Changes in Surface Layers of Two Albaqualf Soils
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Sartori,Gerson Meneghetti Sarzi; Marchesan,Enio; David,Ricardo De; Carlesso,Reimar; Petry,Mirta Teresinha; Aires,Núbia Pentiado; Giacomeli,Robson; Aramburu,Bruno Behenck; Silva,Anelise Lencina da.
ABSTRACT A compacted subsurface soil layer can be a limiting factor for soybean growing, reducing soybean yield. The aim of this study was to evaluate the effect of different tillage systems on the physical properties of two Albaqualf soils of the Central Plains region in the state of Rio Grande do Sul in southern Brazil. Two experiments were conducted: one in Santa Maria, RS, during the 2013/14 and 2014/15 crop seasons, and another in Formigueiro, RS, during the 2013/14 crop season. A randomized block experimental design with four replications was used. The treatments were: sowing using an offset double disc (T1); sowing using a fluted coulter disc (wavy disc with 12 waves) (T2); sowing with a knife runner opener (T3); sowing with a knife runner opener +...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Compacted layer; Deep tillage; Raised bed; Planter mechanism.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100545

Lime and gypsum to improve root depth of orange crop in an Ultisol of the Coastal Tablelands
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Sobral,Lafayette F.; Cintra,Fernando L. D.; Smyth,Jot T.
Coastal Tableland is a landscape unit in the North East of Brazil in which the main soils are Ultisols. In these soils, a compacted layer denominated "cohesive horizon" occurs and root growth is limited by it. An experiment with five treatments and six replications was set up in order to study how liming and gypsum could improve root depth of orange (Citrus sinensis L. Osbeck) crop in an Ultisol in which a compacted layer was found at 0.3 m. Treatments were: A - No liming and no gypsum; B - Liming to achieve 60% base saturation; C - B + 1 t of gypsum ha-1 ; D - B + 2 t of gypsum ha-1 and E - B + 3 t of gypsum ha-1. Gypsum increased calcium and sulfate in the cohesive horizon. Surface application of lime and gypsum did not cause changes in soil density and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Compacted layer; Cohesive horizon; Root growth.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000700004

Growth and development of soybean roots according to planting management systems and irrigation in lowland areas
Provedor de dados: Ciência Rural
Autores: Sartori,Gerson Meneghetti Sarzi; Marchesan,Enio; David,Ricardo De; Nicoloso,Fernando Teixeira; Schorr,Márcio Renan Weber; Filho,Alberto Cargnelutti; Donato,Gabriel.
ABSTRACT: The presence of a compacted soil layer near the ground surface in paddy fields may limit the growth and development of soybean roots. The objective of this study was to evaluate different planting management systems and irrigation on growth and development of soybean root systems in lowland area. The experiment was carried out in 2013/14 and 2014/15 crop seasons in randomized complete block design with factorial treatment (3x2), with four replications. The treatments consisted of different planting management systems: sowing with double disc (A1); sowing with shank (A2) and deep tillage + sowing with double disc (A3), and irrigation: irrigated (D1) and non irrigated (D2). Planting management systems and irrigation influenced the growth of soybean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; Compacted layer; Shank; Deep tillage; Root system.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000901572