Demanda energética e mobilização do solo com o uso de escarificadores em sistemas de semeadura direta

Bellé, Mateus Potrich; Alonço, Airton dos Santos; Francetto, Tiago Rodrigo; Rossato, Fernando; Franck, C; Carpes, Dauto Pivetta

doi:10.1590/s1415-43662014000500013

Cited by 9 publications

(7 citation statements)

References 13 publications

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“…The double-disc showed a shallower working depth, as reported by Palma et al (2010) considering that they are bigger, and it is more difficult for them to penetrate the soil, as stressed by Seidi (2012). Similar results were also found by Koakoski et al (2007) and Mion et al (2009); according to the authors, such results are related to the fact that the hoe furrow opener reaches a greater depth due to the action of the tip, which causes a downward vector that tends to suck down the tip of the hoe.…”

Section: Maximum Furrow Depthsupporting

confidence: 79%

Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Francetto

Alonço

Brandelero

et al. 2016

Span. j. agric. res.

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The present study evaluated the effect of different associations between coulters and fertilizer furrow openers on soil disturbance, furrow depth and width, according to forward speed. The study was conducted on a farm in Santa Maria (Brazil/RS), in soil classified as sandy loam Ultisol. The experiment consisted of 24 combinations of treatments with three replications in a 2×3×4 factorial experiment. The combinations were formed by the interaction of the factors including: two types of furrow openers (hoe and double-disc), three types of coulters (no-coulter, smooth and offset fluted) and four levels of forward speed (1.11, 1.67, 2.22 and 2.78 m/s). Soil elevation and soil disturbance area profiles were obtained with the use of a micro profilometer, and disturbance values were calculated with the aid of computer software program Auto Cad. The disturbance area was not affected by speed; it was greater when using the hoe opener, and in association with the offset fluted coulter. Speed was inversely proportional to the depth of the furrows made by the hoe opener. Furthermore, the hoe caused the greatest furrow width (0.26 m) in comparison with the double-disc (0.24 m). The use of different coulters associated with furrow openers increased this variable (0.23 m for the no-coulter condition, 0.25 m with smooth and 0.26 m with offset fluted). The use of coulters combined with furrow openers reduces soil swelling, in approximately 8% for the smooth and 20% for the offset fluted.

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Section: Maximum Furrow Depthsupporting

confidence: 79%

Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Francetto

Alonço

Brandelero

et al. 2016

Span. j. agric. res.

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“…At all evaluated velocities, the greater the velocity, the higher the demand of power in the drawbar, for both mechanisms used. According to Bellé et al (2014), as the velocity increases, the demand of power also increases.…”

Section: Resultsmentioning

confidence: 99%

Performance of a seeder according to the displacement velocity and furrowing mechanism for fertilizer deposition

Santos

Lima

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TAgribusiness daily increases the demand for machinery with better efficiency, seeking to reduce operating costs and improve the quality of the sowing process. The objective of present study was to evaluate the quality of the longitudinal seed distribution and the operating performance of a seeder-fertilizer according to displacement velocity and furrowing mechanism for fertilizer deposition. The assay was conducted in the experimental area of the Department of Agricultural Engineering of the Federal University of Ceará. The experimental design was randomized blocks, in a 2 x 3 factorial, with four replicates with two furrowing mechanisms for fertilizer deposition (double disc and shank) and three displacement velocities (4.7, 6.3 and 8.2 km h -1 ). The results demonstrate that for the quality of seed distribution, the best performance was obtained with the use of the shank at velocity of 6.3 km h -1 . The tractor-seeder set provided better operating performance using the disc, which promoted the lowest specific consumption at the velocity of 4.7 km h -1 .Desempenho de semeadora-adubadora em função da velocidade de deslocamento e do mecanismo sulcador de fertilizantes R E S U M O Diariamente, o agronegócio aumenta a exigência por maquinário com melhor eficiência buscando a redução dos custos operacionais e a melhoria da qualidade do processo de semeadura. O objetivo do trabalho foi avaliar a qualidade da distribuição longitudinal de sementes e o desempenho operacional de uma semeadora-adubadora em função da velocidade de deslocamento e do mecanismo sulcador de fertilizantes. O trabalho foi realizado na área experimental do Departamento de Engenharia Agrícola da Universidade Federal do Ceará. O delineamento experimental foi em blocos casualizados, em esquema fatorial 2 x 3 com 4 repetições e dois mecanismos para depósito de fertilizantes (disco duplo desencontrado e haste sulcadora) além de três velocidades de deslocamento (4,7; 6,3 e 8,2 km h -1 ). Os resultados demonstram que para qualidade da distribuição de sementes o melhor desempenho foi com o uso da haste sulcadora na velocidade de 6,3 km h -1 . O conjunto trator-semeadora obteve melhor desempenho operacional com o uso do disco obtendo menor consumo específico na velocidade de 4,7 km h -1 .

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“…Os dados foram analisados por meio de estatística descritiva e comparação de médias. Entre as operações realizadas, a escarificação apresentou maior CCO, com 15,56 L ha -1 , que conforme cita BELLÉ et al (2014), pode ser associado à profundidade de operação e à velocidade de trabalho do escarificador, fatores que determinam a força exigida na barra de tração e, por consequência, o maior consumo de combustível. O escarificador, dentre os demais implementos utilizados neste trabalho, foi o que trabalhou em maior profundidade, a 0,20 m, corroborando o maior CCO.…”

Section: Methodsunclassified

Análise econômica de milho convencional e transgênico em dois sistemas de preparos de solo

et al. 2015

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RESUMO:O milho é um produto de grande importância na agricultura, em função de sua ampla utilização e das formas de produção. Tendo em vista esses cenários, o trabalho teve como objetivo a análise econômica do sistema de produção de milho utilizando diferentes híbridos de milho e preparos de solo. O estudo foi realizado na Fazenda Experimental Lageado, pertencente à Faculdade de Ciências Agronômicas/UNESP de Botucatu-SP. Foram analisados dois híbridos em dois tipos de sistemas de preparo do solo, sendo milho convencional e milho transgênico, em preparo convencional e cultivo mínimo. Para os diferentes tipos de cultivo, foram utilizados os mesmos tratores, implementos e adubação, sendo o s seguintes parâmetros analisados: custos operacionais, custos de insumos, renda bruta, renda líquida e relação benefício/custo dos sistemas de cultivo. Conclui-se que a utilização de milho transgênico proporciona redução dos custos operacionais e com insumos, possibilitando, em preparo de cultivo mínimo do solo, maior produtividade, renda líquida e relação benefício/custo. PALAVRAS-CHAVE:custo operacional, produtividade, biotecnologia. ECONOMIC ANALYSIS OF CONVENTIONAL AND TRANSGENIC CORN UNDER TWO SOIL TILLAGE SYSTEMS ABSTRACT:Corn is an agricultural crop of major importance regarding its wide use and production forms. Given these background, this work aimed at analyzing economically the corn production chain with different hybrids and soil tillage systems. The study was carried out at the Experimental Farm of Lageado, located in the College of Agricultural Sciences/ UNESP, campus in Botucatu-SP, Brazil. We analyzed two corn hybrids, one conventional and another transgenic, on soil prepared by conventional cultivation practices and minimum cultivation. The same tractors, implements, and fertilizers were employed for both tillage systems. We evaluated operating costs, input costs, gross income, net income, as well as benefit and cost ratio of both cropping systems. Therefore, we concluded that transgenic corn provides reduced operating costs and inputs, enabling higher yield, net income and benefit/cost relationship when cropped with minimum cultivation practices.

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Demanda energética e mobilização do solo com o uso de escarificadores em sistemas de semeadura direta

Cited by 9 publications

References 13 publications

Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Disturbance of Ultisol soil based on interactions between furrow openers and coulters for the no-tillage system

Performance of a seeder according to the displacement velocity and furrowing mechanism for fertilizer deposition

Análise econômica de milho convencional e transgênico em dois sistemas de preparos de solo

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