scholarly journals PLANTABILIDADE E DISTRIBUIÇÃO LONGITUDINAL DE SEMENTES DE ALGODÃO COM DIFERENTES CONJUNTOS DISCO-ANEL EM DOSADOR MECÂNICO

2021 ◽  
Vol 35 (4) ◽  
pp. 476-483
Author(s):  
Aldir Carpes Marques Filho ◽  
Luiz Henrique Rusconi ◽  
Paulo Roberto Arbex Silva
Keyword(s):  
Gossypium Hirsutum ◽  
Correct Selection ◽  
Longitudinal Distribution ◽  
Gossypium Hirsutum L ◽  
Cotton Crop ◽  
Cotton Seeds ◽  
Tire Testing ◽  
Testing Center ◽  
Selection Of

PLANTABILIDADE E DISTRIBUIÇÃO LONGITUDINAL DE SEMENTES DE ALGODÃO COM DIFERENTES CONJUNTOS DISCO-ANEL EM DOSADOR MECÂNICO   ALDIR CARPES MARQUES FILHO1, LUIZ HENRIQUE MENCK RUSCONI1, PAULO ROBERTO ARBEX SILVA1   1 Departamento de Engenharia Rural, Universidade Estadual Paulista, UNESP/Botucatu, av. Universitária, 3780, Altos do Paraíso, 18610-034, Botucatu, São Paulo, Brasil) [email protected]; [email protected]; [email protected]   RESUMO: A tecnologia em semeadura ou “plantabilidade” é um tema bastante abordado na atualidade e representa a adoção de boas práticas na implantação de lavouras agrícolas. Entre diversos fatores que afetam a qualidade de semeadura está a escolha do conjunto disco e anel dosadores de sementes, como fator de interferência direta na distribuição longitudinal das plantas. Este trabalho teve como objetivo avaliar a interferência da aplicação de dois conjuntos disco-anel de tamanhos diferentes na distribuição longitudinal das sementes na cultura do algodão. O ensaio foi realizado em sistema simulador de semeadura, pertencente ao Núcleo de Ensaios de Máquinas e Pneus Agroflorestais, no Grupo de Plantio Direto (GPD) da UNESP/Botucatu. Os resultados do trabalho mostraram que a seleção adequada do conjunto disco-anel afeta a qualidade da semeadura, sendo que o tratamento T2 apresentou acréscimo de 5% nas falhas e redução de 1% em espaçamentos aceitáveis para a cultura do algodão em semeadura mecânica, assim o percentual de falhas representou um total de 5500 falhas de deposição na lavoura por cada hectare de cultivo. Recomenda-se o uso do conjunto disco-anel T1 (6mm) por ter apresentado os melhores resultados para a variedade de sementes utilizada no experimento.   Palavras-chave: mecanização, tecnologia em semeadura, Gossypium hirsutum L.   PLANTABILITY AND LONGITUDINAL DISTRIBUTION OF COTTON SEEDS WITH DIFERENTS DISC - RING SET IN MECHANICAL DOSER   ABSTRACT: Sowing technology, or “Plantability” is a topic that is widely discussed today and represents the adoption of good practices in the implantation of agricultural crops. Among several factors that affect the quality of planting, the choice of the disc/ring set directly interferes in the longitudinal distribution of plants. This work aimed to evaluate the interference of the application of two disc / ring sets of different sizes in the longitudinal distribution of seeds in cotton crop. Test carried out in a sowing simulator system belonging to the Agroforestry Machinery and Tire Testing Center and the no tillage group (GPD), UNESP/Botucatu. The results of our research showed that the correct selection of the disk-ring set affects the quality of the sowing, and the T2 treatment showed an increase of 5% in the failures and a reduction of 1% in acceptable spacing for the cotton culture in mechanical sowing, as well as the percentage of failures represented 5500 failures of deposition in the field for each hectare of cultivation. It is recommended to use the T1 disk-ring set (6mm) as it has shown the best results for the variety of seeds used in the experiment.   Keywords: mechanization, sowing technology, Gossypium hirsutum L

scholarly journals Physiological quality of Gossypium hirsutum L. seeds after the thermal delinting process

2018 ◽  
Vol 9 (3) ◽  
pp. 465-474 ◽  
Author(s):  
Pablo Radamés Cabral de França ◽  
Francisco De Assis Cardoso Almeida ◽  
Odilon Reny Ribeiro Ferreira da Silva ◽  
Jeane Ferreira Jerônimo
Keyword(s):  
Gossypium Hirsutum ◽  
Dry Weight ◽  
Dry Mass ◽  
Germination Percentage ◽  
Gossypium Hirsutum L ◽  
Mean Values ◽  
Randomized Design ◽  
Physiological Quality ◽  
Cotton Seeds

The removal of lint from cotton seeds is mainly carried out through chemical delinting, but it is an expensive procedure and requires high technology. The objective was to evaluate the physiological quality of Gossypium hirsutum L. seeds delinted by flaming using a thermal delinter prototype. Cotton seeds BRS 286 were flamed in nine settings intensities and compared to chemical delinting and seeds with lint. We analyzed the water content, germination, first count, germination speed index (GSI), length and dry mass of roots and shoots. Using a completely randomized design and the means were compared by Scott-Knott test at 5% probability. In evaluating, the germination percentage did not differ between treatments with chemical and thermal low intensity delinting compared to the control. In vigor tests were observed higher mean values of the chemical treatment to the other treatments, except in GSI test and root dry weight when subjected to thermal delinting of low and medium intensity. The delinting made through the prototype enables efficient results, as well as the chemical delinting with sulfuric acid, without affecting germination and vigor when flamed with low and middle intensity, regardless of the number of active burners.

Overview radiography of abdominal organs in dogs and cats

2020 ◽  
Vol 1 (4) ◽  
pp. 6-14
Author(s):  
V. N. Baymatov ◽  
◽  
A. V. Metelev ◽  
Keyword(s):  
Barium Sulfate ◽  
Bile Ducts ◽  
Individual Characteristics ◽  
Correct Selection ◽  
X Ray ◽  
Abdominal Organs ◽  
Modern Methods ◽  
Extrahepatic Bile Ducts ◽  
Selection Of

Today, less attention has been paid to x-ray studies of animals in connection with the advent of more modern methods. At the same time, the quality of radiopaque substances decreased, which is reflected in this article. The Omnipack, Urografin, Visipack, Barium sulfate, Iodipamide, Bilignost and Biligrafin used in radiopaque contrast studies in most cases did not reveal the hepatobiliary system. Only the last two drugs gave satisfactory results. The complexity of the X-ray examination of the biliary system in cats and dogs lies in the features of the location of the extrahepatic bile ducts and the condition of the intestine, the size of the liver, its structure, echogenicity, the state of the vessels and surrounding organs. In this work, we took into account the anatomical variants of the development and location of organs in animals, which may complicate the study or evaluation of the data obtained. These included changes in the contours, shape, location of the gallbladder and its filling. The results obtained were compared with the available general species standards, taking into account the possible individual characteristics of each animal. Other studied drugs gave satisfactory results with an overall assessment of the abdominal organs, but we preferred Omnipack. Survey radiography provides a large amount of information with the correct selection of radiopaque substances.

Measurement of High Thermodynamic Temperatures in the DLR Solar Furnace by UV-B Detection

Solar Energy ◽  
2002 ◽  
Author(s):  
Nicola Rohner ◽  
Andreas Neumann
Keyword(s):  
Temperature Measurement ◽  
Temperature Measurements ◽  
Solar Furnace ◽  
Correct Selection ◽  
Basic Material ◽  
Atmospheric Conditions ◽  
Spectral Measurements ◽  
System Temperature ◽  
Selection Of

The correct selection of the operating wavelength is essential for a precise pyrometric temperature measurement on solar irradiated samples, as the measurement may be disturbed by reflected solar radiation. Atmospheric conditions and particularly the emissivity as basic material property determine the amount of this reflected and the emitted radiation from a sample under investigation. An approach to solve this problem by using a monochromator system for temperature measurement in the UV-B range was developed and experimentally tested. With this system, temperature measurements were possible beginning at 1320°C and ranging up to about 2400°C. Two calculation methods are described and compared. The influence of the calibration temperature on the quality of the temperature measurement is shown. Measurements on a blackbody up to 1500°C were performed for calibration purpose. Temperature measurements on a real solar heated magnesia sample up to 2400°C are presented and discussed. These spectral measurements on hot bodies irradiated in the DLR Solar Furnace led to the final specification of the measurement wavelengths to be in the range from 280 nm to 293 nm.

Elements and Materials Improve the FDM Products: A Review

2016 ◽  
Vol 16 ◽  
pp. 33-51 ◽  
Author(s):  
Abduladim Salem Bala ◽  
Saidin bin Wahab ◽  
Mazatusziha binti Ahmad
Keyword(s):  
Matrix Material ◽  
Process Parameter ◽  
Correct Selection ◽  
Complex Environment ◽  
Technology Process ◽  
The Matrix ◽  
Additive Materials ◽  
Insight Into ◽  
Selection Of

This work aims to provide a review of available published literature that explores the opportunities to improve the quality of fused deposit modelling (FDM) products, particularly in medical applications. The paper presents details concerning the basis of the technology, process parameter settings and their responses, and reviews the properties of common FDM engineering/bio-materials and the available methods applied for improving their performance. Based on the researches which have been reviewed, FDM technology works within a complex environment from process parameters. Thus, it can achieve good results only with the proper settings for these parameters according to the properties of the material used. Improving the polymers is essentially based on the correct selection of additive materials, which can particularly enhance the key property/properties in the matrix material. This review provides a brief insight into FDM technology, provides an idea of the process parameter settings, the available materials and ways of modifying their properties to consequently improve the quality of FDM products.

The Gambler's Ruin Problem, Genetic Algorithms, and the Sizing of Populations

1999 ◽  
Vol 7 (3) ◽  
pp. 231-253 ◽  
Author(s):  
George Harik ◽  
Erick Cantú-Paz ◽  
David E. Goldberg ◽  
Brad L. Miller
Keyword(s):  
Genetic Algorithms ◽  
Building Blocks ◽  
Correct Selection ◽  
Problem Size ◽  
One Dimensional ◽  
Fitness Evaluation ◽  
Gambler’S Ruin ◽  
Gambler's Ruin Problem ◽  
Selection Of

This paper presents a model to predict the convergence quality of genetic algorithms based on the size of the population. The model is based on an analogy between selection in GAs and one-dimensional random walks. Using the solution to a classic random walk problem—the gambler's ruin—the model naturally incorporates previous knowledge about the initial supply of building blocks (BBs) and correct selection of the best BB over its competitors. The result is an equation that relates the size of the population with the desired quality of the solution, as well as the problem size and difficulty. The accuracy of the model is verified with experiments using additively decomposable functions of varying difficulty. The paper demonstrates how to adjust the model to account for noise present in the fitness evaluation and for different tournament sizes.

scholarly journals First Report of Macrophomina phaseolina on Cotton (Gossypium hirsutum) in Georgia

Plant Disease ◽  
1999 ◽  
Vol 83 (5) ◽  
pp. 487-487 ◽  
Author(s):  
R. E. Baird ◽  
J. H. Brock
Keyword(s):  
Gossypium Hirsutum ◽  
Field Study ◽  
Production System ◽  
Macrophomina Phaseolina ◽  
Potato Dextrose Agar ◽  
Distilled Water ◽  
Gossypium Hirsutum L ◽  
First Report ◽  
Cotton Seeds ◽  
Secondary Roots

In a field study evaluating the diversity and density of the soilborne mycobiota in a cotton (Gossypium hirsutum L.) production system, Macrophomina phaseolina (Tassi) Goidanich was isolated on potato dextrose agar from dark brown to black lesions on feeder and secondary roots. Multiple proliferations of feeder and secondary roots were also observed. Isolate RB 656 obtained from these lesions was tested for pathogenicity in the greenhouse by mixing 25 ml of 2-week-old cornmeal sand inoculum (3 g of cornmeal, 100 g of sand, and 20 ml of distilled water) with 5 liters of autoclaved soil (Leefield loamy sand, pH 6.2) per pot (40 × 200 cm). Control pots containing autoclaved soil alone were included for comparison. On 17 September, 10 cotton seeds of DPL 90 were sown per pot. Each treatment had five replications. Forty days after planting, plant heights from pots containing M. phaseolina were lower (14.8 cm) than those in the control pots (19.6 cm), but stand counts were similiar. On this date, four plants were left in each pot to allow the remaining seedlings to reach full maturity. On 9 December, the four plants per replicate pot were removed and roots evaluated for damage. Lesions similiar to those seen originally were observed on the secondary and feeder roots of the infested pots, and the characteristic proliferation of feeder and secondary roots was noted. Tap roots in pots containing M. phaseolina were smaller (11.6 cm) than in the control pots (18.6 cm). Isolate RB 656 was reisolated from the damaged roots in the treated pots. This is the first report of M. phaseolina on cotton in Georgia.

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