38 results

Soil management practices adopted by farmers and how they perceive conservation agriculture

Tiago Santos Telles ORCID logo , Thadeu Rodrigues de Melo ORCID logo , Ana Julia Righetto ORCID logo , Elizeu Jonas Didoné ORCID logo , Graziela Moraes de Cesare Barbosa ORCID logo

14/Apr/2022

ABSTRACT In some rural properties of Brazil, soil and water conservation practices are partially or inappropriately implemented, intensifying soil erosion, even in no-tillage (NT) areas. This study aimed to check the farmer’s understanding of conservation agriculture (CA) and assess whether they are using practices appropriate to soil conservation. A basin in the state of Paraná, in Southern Brazil, was selected. Surveys were conducted based on a structured questionnaire and in-person interviews of 234 farmers. Among these farmers, 67 % do […]

Visual Abstract

Cover crops and controlled-release urea decrease nitrogen mobility and improve nitrogen stock in a tropical sandy soil with cotton cultivation

Carlos Felipe dos Santos Cordeiro ORCID logo , Daniel Rodela Rodrigues ORCID logo , Ana Flávia de Souza Rorato ORCID logo , Fábio Rafael Echer ORCID logo

02/Feb/2022

ABSTRACT Sandy soil often has low nitrogen (N) stock. Thus, crops grown in sandy soil rely on high levels of N fertilization. The use of cover crops and efficient fertilizers can increase N stock in the soil and N availability in the topsoil, and reduce overall fertilizer costs. The objective of this study was to evaluate the effects of cover crops (fallow, a single grass species (ruzigrass), two grass species (ruzigrass + millet), one grass species (millet) with legumes [lime-yellow […]

Visual Abstract

Adoption of the no-tillage system in Paraná State: A (re)view

Edivan José Possamai ORCID logo , Paulo Cesar Conceição ORCID logo , Caroline Amadori ORCID logo , Marie Luise Carolina Bartz ORCID logo , Ricardo Ralisch ORCID logo , Marcelo Vicensi ORCID logo , [...]

13/Jan/2022

ABSTRACT The concept of a no-tillage system (NTS), or “Sistema Plantio Direto,” was established in Brazil from the evolution of no-tillage (NT) or “Plantio Direto,” given the edaphoclimatic conditions and the need to promote chemical, physical and biological improvements in cultivated soils. While “Plantio Direto” is a conservationist practice, “Sistema Plantio Direto” presents itself as an agricultural production system based on the simultaneous adoption of minimum soil disturbance, maintenance of permanent soil cover and crop rotation. This study reviews the […]

Visual Abstract

Effect of cropping systems in no-till farming on the quality of a Brazilian Oxisol

Getulio de Freitas Seben Junior, José Eduardo Corá, Rattan Lal

01/Aug/2014

The no-till system with complex cropping sequences may improve the structural quality and carbon (C) sequestration in soils of the tropics. Thus, the objective of this study was to evaluate the effects of cropping sequences after eight years under the no-till system on the physical properties and C sequestration in an Oxisol in the municipality of Jaboticabal, Sao Paulo, Brazil. A randomized split-block design with three replications was used. The treatments were combinations of three summer cropping sequences – corn/corn […]

Stabilization of soil hydraulic properties under a long term no-till system

Luis Alberto Lozano, Carlos Germán Soracco, Vicente S. Buda, Guillermo O. Sarli, Roberto Raúl Filgueira

01/Aug/2014

The area under the no-tillage system (NT) has been increasing over the last few years. Some authors indicate that stabilization of soil physical properties is reached after some years under NT while other authors debate this. The objective of this study was to determine the effect of the last crop in the rotation sequence (1st year: maize, 2nd year: soybean, 3rd year: wheat/soybean) on soil pore configuration and hydraulic properties in two different soils (site 1: loam, site 2: sandy […]

Crop response to organic fertilization with supplementary mineral nitrogen

Nathalia Riveros Ciancio, Carlos Alberto Ceretta, Cledimar Rogério Lourenzi, Paulo Ademar Avelar Ferreira, Gustavo Trentin, Felipe Lorensini, [...]

01/Jun/2014

Animal manure is applied to the soil as a nutrient source, especially of nitrogen, to plants. However, manure application rates can be reduced with the use of N fertilizer in topdressing. The aim of this study was to evaluate crop responses to different application rates of animal manure sources, used alone and supplemented with mineral N topdressing, in a no-tillage system. The study was carried out from 2005 to 2008 on a Hapludalf soil. The treatments consisted of rates of […]

Congo grass grown in rotation with soybean affects phosphorus bound to soil carbon

Alexandre Merlin, Zhenli L. He, Ciro Antonio Rosolem

01/Jun/2014

The phosphorus supply to crops in tropical soils is deficient due to its somewhat insoluble nature in soil, and addition of P fertilizers has been necessary to achieve high yields. The objective of this study was to examine the mechanisms through which a cover crop (Congo grass – Brachiaria ruziziensis) in rotation with soybean can enhance soil and fertilizer P availability using long-term field trials and laboratory chemical fractionation approaches. The experimental field had been cropped to soybean in rotation […]

Carbon and nitrogen in the particle size fractions of soil organic matter in crop systems under no-tillage

Bruna Raquel Winck, Fabiane Machado Vezzani, Jeferson Dieckow, Nerilde Favaretto, Rudimar Molin

01/Jun/2014

Soil quality in no-till systems is related to the crop systems and may be evaluated through particulate organic matter (>53 ∝m) stock due to the functionality this property provides to the soil and its sensitivity to management practices. Aiming to assess soil quality no-till crop systems, this study was carried out through a long-term experiment (21 years) in a Latossolo Vermelho distrófico típico (typical Oxisol) in Ponta Grossa, PR, Brazil. Six crop systems were assessed. Wheat-TR (Triticum aestivum L.), soybean-SO […]

Pig slurry and nutrient accumulation and dry matter and grain yield in various crops

Cledimar Rogério Lourenzi, Carlos Alberto Ceretta, Gustavo Brunetto, Eduardo Girotto, Tadeu Luis Tiecher, Renan Costa Beber Vieira, [...]

01/Jun/2014

Pig slurry (PS) represents an important nutrient source for plants and using it as fertilizer makes greater nutrient cycling in the environment possible. The aim of this study was to assess how PS application over a period of years can affect grain yield, dry matter production and nutrient accumulation in commercial grain and cover crops. The experiment was carried out in an experimental area of the Universidade Federal de Santa Maria, in Santa Maria, RS, Brazil, from May 2000 to […]

Physical properties and particle-size fractions of soil organic matter in crop-livestock integration

Carolina Tirloni, Antonio Carlos Tadeu Vitorino, Anderson Cristian Bergamin, Luiz Carlos Ferreira de Souza

01/Aug/2012

Crop-livestock integration represents an interesting alternative of soil management, especially in regions where the maintenance of cover crops in no-tillage systems is difficult. The objective of this study was to evaluate soil physical and chemical properties, based on the hypothesis that a well-managed crop-livestock integration system improves the soil quality and stabilizes the system. The experiment was set up in a completely randomized design, with five replications. The treatments were arranged in a 6 x 4 factorial design, to assess […]

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