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Evaluation of Visible Losses and Damage to the Ratoon Cane in the Mechanized Harvesting of Sugarcane for Different Displacement Speeds

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American Journal of Plant Sciences 2014年第20期5卷 2956-2964页

作者： Carmen Maria Coimbra Manhaes Ricardo Ferreira Garcia delorme Correa Junior Francisco Mauricio Alves francelino helenilson de oliveira francelino Carlos Mair Franca Goncalves dos Santos Laboratory of Agricultural Engineering State University of North Fluminense Darcy RibeiroCampos dos GoytacazesBrazil

This study aimed at quantitatively evaluating the sugarcane losses and the damage caused to the ratoon cane while using the Case IH A8800 harvester in different displacement speeds;it was conducted in the municipality of Campos dos Goytacazes, in Rio de Janeiro, Brazil. Three speeds were used as treatment (2 km·h-1, 3 km·h-1, and 4.5 km·h-1), and each treatment was composed of six rows of harvested ratoon, each with a length of 290 m. In order to evaluate the quantitative losses in t·ha-1 and the percentage of losses, the remaining sugarcane, left on the field after harvesting, was collected. The sampling frame was set to every 50 m, dividing the borders by 40 m;the measurement for each sampling area was of 20 m2, with five repetitions. In order to evaluate the damage caused to the ratoon canes, we chose a visual methodology to classify the damage degrees, ranging from one to four. There was no significant difference in losses when comparing different speeds. Therefore, it is more advantageous and economically viable to use the speed of 4.5 km·h-1, which collects more in less time.

关键词： Harvesting Mechanization Displacement Speed Sugarcane

Visible Losses to the Mechanical Harvesting of Ratoon Sugarcane Using the Harvester John deere 3520

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American Journal of Analytical Chemistry 2018年第11期9卷 580-590页

作者： Carmen Maria Coimbra Manhaes Francisco Mauricio Alves francelino Rafael Alves de Araujo Danilo Gomes de oliveira helenilson de oliveira francelino Mirian Peixoto Soares da Silva Aline da Silva Santos Mauricio Donato de Moura Junior Federal Institute of Education Science and Technology of Tocantins—FTOPalmasBrazil State University of North Fluminense Rio de JaneiroBrazil

The aim of this study was to evaluate the visible loss of sugar cane and the damage to the knuckles, using the John deere 3520 harvester on three different travel speeds (3.0;4.0 and 5.0 km·h-1), in DIC with five repetitions in Campos dos Goytacazes, Rio de Janeiro/Brazil. Each treatment was composed by six lines of harvested cane stumps, with a length of 290 m each. In these six lines, the remains of sugar cane left in the field were collected by placing the sampling frame in two central lines every 50 m, and separating 40 m of edge. The sampling area was surrounded by 2 m wide and 10 m long, totaling 20 m2. To calculate the damage to stumps, a visual methodology by [1], was used, which classifies the damage grade, ranging from 1 to 4. Fifty stumps were assessed randomly for each speed, in a sampling area of 1800 m2. The data were submitted to ANOVA and Tukey test at 5%, in order to compare the effect of different speeds on the losses and damages. There was no significant difference regarding the loss or damage by comparing the different speeds. Therefore, it is more advantageous to use the speed of 5.0 km·h-1, harvesting more in less time and causing the same level of damage.

关键词： Damages Saccharum spp. Travel Speed John deere 3520 Harvester

Obtaining morphometric variables from gullies using two methods of interpolation laser scanner data:the case study of Vassouras,Brazil

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Journal of Mountain Science 2020年第12期17卷 3012-3023页

作者： oliveira Carlos Magno Moreira de francelino Márcio Rocha MENDONCA Bruno Araujo Furtado de RAMOS Isabela Queiroz Instituto Federal do Norte de Minas Gerais-Campus Arinos Rodovia MG 202Km 407 s/nZona RuralArinos-MG38680-000Brazil departamento de Solos Universidade Federal de VigosaAv.Peter Henry Rolfss/n-Campus UniversitarioViqosa-MG36570-900Brazil departamento de Silvicultura Universidade Federal Rural do Rio de JaneiroBR 465 Km 07Seropedica-RJ23890-000Brazil Instituto do Meio Ambiente e dos Recursos Hidricos do Distrito Federal SEPN 511Bloco C70750-543BrasiliaDFBrazil

Gully erosion is a worldwide problem of land degradation and water quality,and it is also frequent in ***,anthropic influence is the major driver of gully *** study and monitor gullies it is necessary to use specific instruments and methods to obtain accurate *** objective of this study was to use Terrestrial Laser Scanning(TLS) to create digital elevation model(deM) accurately and define morphometric variables that characterize gullies in a mountainous *** different interpolations were evaluated using the Topogrid and GridSurfaceCreate algorithms to elaborate *** profile for gullies was used to assess modeling *** deM of the Gully 1(G1) from the Topogrid algorithm estimated soil loss of 49%,whereas the GridSurfaceCreate algorithm estimated a soil loss of97%,in a period of 1 *** estimated soil loss for the Gully 2(G2) was 14% from the Topogrid,and 8%from the GridSurfaceCreate *** GridSurfaceCreate algorithm underestimated the volume to area ratio for G2 due to a failure on interpolating a region of low point *** Topogrid algorithm represented better the terrain irregularities,as observed through the topographic profiles traced in three regions of G1 and *** analysis showed that the GridSurfaceCreate algorithm presented lower accuracy in estimating *** underestimation trend of this algorithm was also observed in *** gullies showed considerable soil losses,which may reduce the areas suitable for agricultural activities,and silting up of water *** Topogrid algorithm presented satisfactory results,denoting great potential to produce morphometric data of gullies.

关键词： Erosion process Interpolation algorithms Spatial statistics Digital Elevation Model Topographic profile

The Effect of Different Irrigation Levels in Cowpea Production in the Mid-Northern Region of Tocantins—Brazil

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American Journal of Climate Change 2018年第4期7卷 548-557页

作者： Francisco Mauricio Alves francelino Fabio Cunha Coelho Carmen Maria Coimbra Manhaes Danilo Gomes de oliveira Levi Rodrigues Neto Mirian Peixoto Soares da Silva State University of North Fluminense—Darcy Ribeiro—UENF CamposBrazil Federal Institute of Education Science and Technology of Tocantins—IFTOPedro AfonsoBrazil Federal Institute of Education Science and Technology Goiano—IFGOIANOPossesBrazil Federal Institute of Education Science and Technology of Tocantins—IFTOColinas do TocantinsBrazil

The objective of this study was to evaluate the effects of the application of irrigation levels in the productivity and water use efficiency, in the soil and climatic conditions of the municipality of Colinas do Tocantins, located in the Mid-Northern region of the State of Tocantins. The cowpea cultivation system was submitted to the application of five irrigation blades, based on ET0—Reference Evapotranspiration: Blade 0% of ET0, Blade 50% of ET0, Blade 75% of ET0, Blade 100% of ET0 and Blade 125% of ET0 (B0, B50, B75, B100 and B125% of ET0). The descriptive statistics were used to analyze the data, applying the 95% confidence interval to discriminate the differences between the treatments, since the replicates were constituted of 100 plants harvested at random within the plot for each treatment and no design method was performed. A significant effect of the different levels was found on all evaluated components, with the exception of the length of the pod, which did not differ in the irrigation levels. The increase in irrigation contributed to the increase of the results of the components that compete directly for higher productivity, such as number of pods per plant, weight of pods and number of seeds per pod. In these results, it was found that higher irrigation levels confer higher yields. Water-use efficiency—WUE behaved as per productivity trend, that is, it decreased with the reduction of irrigation levels.

关键词： Vigna unguiculata(L.) Productivity Water Efficiency