Qualidade da colheita mecanizada de feijão (Phaseolus vulgaris) em dois sistemas de preparo do solo

Silva, Rouverson Pereira da; Cassia, Marcelo Tufaile; Voltarelli, Murilo Aparecido; Compagnon, Ariel Muncio; Furlani, Carlos Eduardo Angeli

doi:10.1590/s1806-66902013000100008

Cited by 39 publications

(42 citation statements)

References 13 publications

(11 reference statements)

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“…Thus, in the treatments of combined operations and left side of the mechanized fertilization, the coefficients of asymmetry and kurtosis were close to 0, showing normal distribution, however with two operations and the right side of the fertilization operation showed higher values, rebounding with an asymmetric distribution, obtaining more dispersed values. Silva et al (2013), also found that some of the analyzed variables had normal distribution by the normality test, so the same showed in the descriptive analysis median values close to the average; the standard deviation with low value; the Cs had a positive asymmetric distribution (Cs>0) and small (|Cs|<0.15), the Ck showed leptokurtic distribution (Ck>0), that is, more concentrated and platykurtic data (Ck<0) with concentrated values. These authors also cited the variables with positive asymmetric distribution (Cs>0) and high (|Cs|>1), as a consequence, the average value was far from the median and the total amplitude with high variability.…”

Section: Descriptive Statistics Of Potassium Chloride Distributionmentioning

confidence: 52%

Mechanized and Individualized Application of N-P-K in Combined Operations in Sugarcane

et al. 2017

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ABSTRACT:A new concept of fertilizer machine is under development and shows as differential individually fertilizer application, that is sources of N, P and K are applied separately for the purpose of improving the distribution efficiency of the quantities applied. The aim was to compare the quality of the individualized mechanized distribution of N, P and K in combined operations with and without herbicide application, as well as to evaluate the fertilizer application on each side of the fertilizer machine. The experiment was carried out on Cascavel farm, in the municipality of Matão-SP. The experimental design was established according to the criteria of quality control, and variables monitoring carried out in the place during fertilization operation, having the fertilizer distribution operation; simultaneous operation of fertilizer distribution and herbicide application treatments; and two simple operations, fertilizer distribution followed by herbicide application. We concluded that the better operational quality was in two distinct operations. The right side of the fertilizer had the best result because it applied the amount close to the regulated dosage. The distribution of potassium chloride expressed in the control charts greater operational quality compared to other fertilizers.

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Section: Descriptive Statistics Of Potassium Chloride Distributionmentioning

confidence: 52%

Mechanized and Individualized Application of N-P-K in Combined Operations in Sugarcane

et al. 2017

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“…However, most of these variables had 5 to 10% of their points outside the control limits, whereas the rotor speed (at 5 km h -1 ) and grain moisture content (at 7 km h -1 ) had 50% and 35% of their points outside the control limits, respectively. Considering the high variability usually observed for quality indicators in a harvesting process (Silva et al, 2013b), the quantity of points observed outside the control limits was low and therefore did not indicate real process instability.…”

Section: -Clustering; M -Mixture; T -Trend; O -Oscillation;mentioning

confidence: 95%

“…Most studies used control charts to identify the occurrence of special causes Silva et al, 2013b;Voltarelli et al, 2013Voltarelli et al, , 2014Voltarelli et al, , 2015Noronha et al, 2011;Custodio et al, 2012). Chioderoli et al (2012) reported that control charts can be used efficiently to evaluate the quality of Felipe B. F. de Lima, Michel A. F. da Silva, Rouverson P. da Silva, et al Eng.…”

Section: Introductionmentioning

confidence: 99%

Quality of Mechanical Soybean Harvesting at Two Travel Speeds

Lima

Silva

2017

Eng. Agríc.

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Soybean harvesting is the last operation performed in the field and therefore has high added value. Quantitative losses during this process should therefore be minimized to achieve maximum quality and increase the sustainability of the production system. The aim of the present study was to determine and characterize the quantitative losses and operational characteristics of an axial-flow combine harvester, using tools from Statistical Quality Control to determine the quality of the harvesting operation. The experiment was designed in accordance with the assumptions of statistical process control, with a total of 40 sampling points monitored over time. Quality indicators of harvester performance and crop agronomic characteristics were evaluated at two harvester travel speeds (5 and 7 km h -1 ). The stability of the process was confirmed for the variables indicated by the analysis of run charts for the variables engine water temperature at a travel speed of 5 km h -1 ; engine oil pressure, fuel consumption and cutting height at a travel speed of 7 km h -1 ; and losses at both speeds, indicating that these were only affected by natural causes.

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“…In these works, the tool typically used to identify non-random causes or special causes arising from instability of the process are the individual values of control charts (CHIODEROLI et al, 2012;COMPAGNON et al, 2012;CASSIA et al, 2013;SILVA et al, 2013;VOLTARELLI et al, 2013;ZERBATO et al, 2013;VOLTARELLI et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Times of Efficiency and Quality of Soybean Crop Mechanical Operation in Geometry Functions of Plots

et al. 2017

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ABSTRACT:The knowledge of the operational quality of soybean harvester provides useful information to management in order to obtain the maximum performance of all available resources, with minimal expenses. The aimed of this study was to evaluate the quality of mechanized soybean harvesting operation in different formats of plots through statistical process control. Treatments were established from the formats of existing plots in the area (irregular, trapezoidal and rectangular). The activities carried out during the harvest were monitored (harvesting, unloading, handling, maneuvering and climate charts) and through these activities were made the calculation of capacity and harvesting operation efficiencies. In the determination of total losses were used 4 circular frames of 0.33 m² each, the grain losses were considered below and above these frames. The statistical analysis was by means of statistical process control opting for the use of the type CUSUM charts. The rectangular plot showed greater management efficiency and harvesting efficiency. The trapezoidal shape facilitated the maneuvers relative to others. The rectangular plot has better quality of operation in relation to others. The CUSUM control chart showed to be effective in preventing instability and maintenance of process quality.

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Qualidade da colheita mecanizada de feijão (Phaseolus vulgaris) em dois sistemas de preparo do solo

Cited by 39 publications

References 13 publications

Mechanized and Individualized Application of N-P-K in Combined Operations in Sugarcane

Mechanized and Individualized Application of N-P-K in Combined Operations in Sugarcane

Quality of Mechanical Soybean Harvesting at Two Travel Speeds

Times of Efficiency and Quality of Soybean Crop Mechanical Operation in Geometry Functions of Plots

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