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Design and test of a pneumatic precision metering device for wheat CIGR Journal
Satti Hassan Yasir; Department of Agricultural Mechanization, College of Engineering, Huazhong Agricultural University, Wuahn-China; QingXi Liao; Department of Agricultural Mechanization, College of Engineering, Huazhong Agricultural University, Wuahn-China; Jiajia Yu; Department of Agricultural Mechanization, College of Engineering, Huazhong Agricultural University, Wuahn-China; Dali He; Department of Agricultural Mechanization, College of Engineering, Huazhong Agricultural University, Wuahn-China.
The objective of this study was to apply the precision metering on wheat seeding to overcome seed damage, seed loss and non-uniform distribution.  Accordingly, a prototype of the pneumatic precision metering device for wheat was developed.  The performance of the device, including quality of feed index (QFI), multiple index (MULI), miss index (MISI) and seed rate expressed in number of kernels per meter length (KPM), was investigated under laboratory conditions in Wuhan using a test stand with camera system.  The results revealed that the rotating speed (RS) and negative pressure (NP) and their interactions had a significant effect on these variables.  The maximum QFI (92.98%) was obtained at rotating speed of 19.0 rpm and negative pressures of 2.5 kPa...
Palavras-chave: Wheat; Experiments; Performance indices; Pneumatic precision metering device.
Ano: 2012 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2073
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Design a capacitive sensor for rapid monitoring of seed rate of sugarcane planter CIGR Journal
Taghinezhad, Javad; Alimardani, Reza; Jafary, Ali.
A capacitive sensor method for measuring billet spacing uniformity with sugarcane (Saccharum officinarm L.) billet planter is investigated in this paper.  Therefore, an electronic device based on capacitive sensor was designed and developed to predict the planting spacing of sugarcane billets.  It consisted of four components: a rectangular parallel plate capacitor, electronic circuitry, microcontroller, and display unit.  Accordingly, a prototype of the precision metering device for sugarcane billets was developed.  After calibrating the monitoring system, the results were verified with calibrated curve by means of linear regression and paired T-test.  The performance of the device, including quality of feed index (QFI), multiple index and miss index was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capacitive system; Sugarcane; Compare monitoring; Performance indices; Precision planting.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2576
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Índice de desenvolvimento do setor externo sucroalcooleiro brasileiro: uma análise de 1999 a 2007 AgEcon
Cardoso, Rubiane Daniele; Rodrigues, Katia Fabiane; Dahmer, Vanessa de Souza; Shikida, Pery Francisco Assis.
This research aimed to evaluate the performance of the external sector in the Brazilian sugar and ethanol industry from 1999 to 2007. Were used two indicators of international trade, the Openness Index (Oi) and External Sector Development Index (SXi). As a corollary, it was found that the degree of openness of trade, in the period, had intermediate levels. The sugar and ethanol industry had several years in high vulnerability, instead, the analysis showed that the industry is looking for a greater presence in international trade, considering that showed an increasing trend in trade volume.
Tipo: Journal Article Palavras-chave: Brazilian sugar and ethanol; Performance indices; International trade; Brazil; International Relations/Trade.
Ano: 2009 URL: http://purl.umn.edu/94838
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