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| ADEBUKOLA, ADENIGBA ADEMOLA. |
| Abstract A Fish feed mixing machine was designed, developed and the effect of speed and retention time on the performance of the mixer was evaluated. The mixing system was tested using three fish feed ingredients; bone meal, groundnut cake and maize grain which was purchased from the market in Akure, Ondo State, Nigeria. The moisture content of the bought ingredients was determined to be 13.1%, 14.7% and 17.5% moisture content dry basis respectively. The mixer was tested using a feed component of three equal measures of 10 kg of ground corn (maize), milled groundnut cake and bone meal which were initially retained on 2 mm, 850 µm and 150 µm sieve respectively. The experiment was replicated thrice at four retention time (5 min, 10 min, 15 min and 20 min)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Agric engineering; Post-harvest engineering; Groundnut; Dehulling; Fish feed; Feed production; Performance evaluation; Design of a mixer; Effect of speed on feed mixing; Retention time; Degree of mixing; Coefficient of variation; Feed mixer Bone Meal; Groundnut Cake; Ground Corn; Mixing Machine; Degree of Mixing; Coefficient of Variation. |
| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5420 |
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| Camargo,Ederson Gomes; Marques,Daniele Botelho Diniz; Figueiredo,Elsio Antonio Pereira de; Silva,Fabyano Fonseca e; Lopes,Paulo Sávio. |
| ABSTRACT We aimed to estimate litter size and litter uniformity genetic parameters and genetic trends of Landrace pigs at birth and at three weeks by using multitrait analyses for 2,787 litters. The following litter traits were evaluated: number of piglets born alive (NBA), within-litter weight mean at birth (MBW), within-litter weight standard deviation at birth (SDB), within-litter weight coefficient of variation at birth (CVB), number of piglets at three weeks (NT), within-litter weight mean at three weeks (MT), within-litter weight standard deviation at three weeks (SDT), and within-litter weight coefficient of variation at three weeks (CVT). Heritability estimates for NBA, MBW, SDB, and CVB were 0.09±0.04, 0.31±0.08, 0.01±0.04, and 0.07±0.05,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of variation; Genetic parameters; Genetic trends; Piglet; Variation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100402 |
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| Gubiani,Paulo Ivonir; Reichert,José Miguel; Reinert,Dalvan José; Gelain,Neiva Somavilla. |
| Soil penetration resistance (PR) is a measure of soil compaction closely related to soil structure and plant growth. However, the variability in PR hampers the statistical analyses. This study aimed to evaluate the variability of soil PR on the efficiency of parametric and nonparametric analyses in indentifying significant effects of soil compaction and to classify the coefficient of variation of PR into low, medium, high and very high. On six dates, the PR of a typical dystrophic Red Ultisol under continuous no-tillage for 16 years was measured. Three tillage and/or traffic conditions were established with the application of: (i) no chiseling or additional traffic, (ii) additional compaction, and (iii) chiseling. On each date, the nineteen PR data... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compaction; Coefficient of variation; Normality. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500003 |
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| Silva,Flavio H. da; Cunha,Paulo C. R. da; Almeida,André C. de S.; Araújo,Lucas da S.; Jakelaitis,Adriano; Silveira,Pedro M. da. |
| ABSTRACT High corn yields in high-tech systems are related to proper crop implementation. This study aimed to evaluate the effects of variability in the distribution of seeds along the planting row on corn production components. The study was conducted under Cerrado conditions in the municipality of Urutaí, GO, Brazil. The experimental design was randomized blocks in a 5 x 2 factorial scheme, with four replicates. The effects of five coefficients of variation (0, 20, 40, 60 and 80%) of non-uniformity in the spatial distribution of seeds along the planting row of two corn hybrids (P30F53HX and P3646HX) were evaluated. No interactions were observed for the analysed corn variables. However, as the non-uniformity in seed distribution along the planting row... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of variation; Grain yield; Non-uniformity; Zea mays. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201172 |
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