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| Registros recuperados: 1.323 | |
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| Fortes, Andéa Maria Teixeira; UNIOESTE; Mauli, Marcia Maria; UNIOESTE; Rosa, Danielle Medina; UNIOESTE; Piccolo, Gislaine; UNIOESTE; Marques, Denise Sommer; UNESP; Refosco, Rachel Mohana de Carvalho; UNIOESTE. |
| As plantas invasoras são constantes e diminuem a produtividade das culturas por competirem por espaço, nutrientes e água. Dessa forma, os agricultores adotam, em grande escala, produtos químicos eficientes no controle da lavoura e com alta toxicidade ao meio ambiente. Existem, no entanto, formas alternativas para o controle de invasoras, por meio de aleloquímicos presentes em algumas plantas, dentre elas, as medicinais. Este trabalho tem como objetivo analisar as propriedades alelopáticas dos extratos das plantas medicinais Cymbopogon citratus (DC) Stapf. e Sambucus australis Cham. and Schltdl. em inibir a germinação de Bidens pilosa L., sem interferir na germinação de Glycine Max L. Merrill. Os extratos foram obtidos triturando-se 200 g de folhas com 1 L... |
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Palavras-chave: 5.01.00.00-9 Agronomia alelopatia; Espécies invasoras; Agricultura allelopathy; Invasive specie; Agriculture. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/718 |
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| Mohammad Hossein Mokhtari; 1Assistant professor, Desert management Department, Yazd University, Yazd, Iran; Hamid Reza Sodae; Assistant professor, Desert management Department, Yazd University, Yazd, Iran; Mohammad Ali Hakimzadeh; Assistant professor, Desert management Department, Yazd University, Yazd, Iran; Fahimeh Tarighat; MSc student at Yazd uiversity. |
| Soil and water salinity is the most limiting factor for plant growth and productivity. Due to a high rate of evaporation, agricultural lands become saline in arid regions after a while. This leads to a decline in plant production. The present study investigated the capability of visible and near infrared (VNIR) spectrophotometry as a non-destructive method in detecting salinity effect on wheat leaves. A completely randomized design was work out with four salinity levels and three replicates. Wheat seeds were planted in plastic pots and irrigated with four levels of saline water [0 (control), 4, 8 and 12 dSm-1] Leaf spectrophotometry at VNIR (190-1100 nm) wavelength was performed on wheat leaves at the nodule-formation growth stage. The results indicated... |
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Palavras-chave: Agriculture; Soil Science; Crop Science Salinity Wheat Spectroscopy Visible and Near-infrared. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2814 |
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| Tabatabaekoloor, Reza. |
| In order to better design and modification of peach post harvesting systems such as sorting, conveying and packaging, selected engineering properties and bruise susceptibility of two Iranian peach varieties (Elberta and Spring time) were determined. Physical and mechanical properties such as dimensions, mass, volume, projected area, surface area, sphericity, static friction and rolling resistance coefficients on various surfaces, firmness and compressibility were measured. Also, effect of cultivar, drop height (50, 100 and 150 mm) and contact surface material (fruit, steel and rubber) on the bruise area and volume were investigated. Analysis of variance results indicated that cultivar had a significant effect (p |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Postharvest peach physical and mechanical properties bruise area bruise volume. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2570 |
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| Maciel, Gisele; de la Torre, Diego; Bartosik, Ricardo; Izquierdo, Natalia; Cendoya, Gabriela. |
| The adsorption and desorption equilibrium moisture content/equilibrium relative humidity relationships of sunflower seeds with four different oil contents (35.7%, 44.6%, 48.6% and 52.7%) were obtained for temperatures of 8, 15, 25 and 35°C and moisture contents of 6.0%, 8.5%, 11.0%, 13.5%, 16.0% and 18.5%.The goodness of fit of four equilibrium moisture content/equilibrium relative humidity models (Modified Henderson, Modified Chung-Pfost, Modified Halsey and Modified Oswin) were evaluated for each oil content. The Modified Halsey model was the best for predicting equilibrium moisture content/equilibrium relative humidity relationships based on the Akaike Information Criterion, the Bayesian Information Criterion and estimated residual standard derivation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Grain postharvest; Storage Isotherms; Models; Parameters; Sunflower; Oil content; Safe storage moisture content.. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3269 |
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| Xin, Jiannong. |
| The mobile revolution transformed our lives in the ways we socialize and conduct business. Today, mobile technology is an essential element of every aspect of digital success. More people are accessing the Internet through mobile devices than through wired connections. Mobile device users are always connected, actively leveraging information, knowledge and social activities. The rapid growth of mobile usage in the world created many opportunities that leverage the ubiquity of mobile networks. Clearly mobile revolution will continue, and organizations not only create mobile strategy, they devote more resources to deliver innovative mobile services and next must-have applications (apps) for the agricultural sector. There are many design challenges and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Information Technology in Agriculture mobile technology and apps; Cross platform; Agriculture. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3255 |
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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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| Narayanan, Gayathri; Kurup, Dhanesh. |
| This work undertakes an extensive survey of the channel modelling methods and path-loss characterization carried out in agricultural fields and vegetation environments in an attempt to study the state-of-the-art in this field, which, though vastly explored, still presents extremely diverse opportunities and challenges. The interface for communication between nodes in a typical agricultural field is the wireless channel or air interface, making it imperative to address the impairments that are exclusive to such a communication scenario by studying the characteristics of the medium. The performance of the channel is a direct indicator of the quality of communication. It is required to have a lucid understanding of the channel to ensure quality in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Channel modelling; Path loss; Sensor networks. |
| Ano: 2023 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7157 |
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| Syuaib, M. Faiz. |
| The nature of agricultural production system in Indonesia is very diverse from shifting cultivation to intensive crop farming, from rain-fed to intensive-irrigated paddy field, from vegetables mix farming to monoculture industrial plantations, from subsistence small-scale farming to large-scale commercial plantation. As the fourth most populous country in the world that is inhabited by 250 million people, agriculture plays a substantial role in Indonesian economy which generates close to half of total employment and accounts for about a fifth of GDP, as well as the very important contributor of export. Notwithstanding the great potential resources and market demand, the sustainability of agriculture in the country remains challenging. The challenge is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural & Biosystem Engineering Indonesia; Agriculture; Sustainable; Facts; Challenges. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3747 |
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| shaker, ahmed mahmoud. |
| The Egyptian cotton leaf worm, Spodoptera littoralis (Boisd.) (Noctuidae: Lepidoptera) is an economically important pest with a wide range of host plants. It attacks certain vegetable and field crops such as cotton, tomatoes, cabbage and squash in Egypt, for causing severe injuries to the plants in all phonological crop stages, In addition to this species has acquired resistance to many insecticides. The overall objective of this investigations was to look for new control strategy through evaluate the effects of application of TiO2 nanoparticles on the survival and biology of this insect. The experiment were carried out under laboratory conditions, the experiment was achieved with two treatments, consisting of TiO2 nanoparticles application, and a negative... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: TiO2; Nanoparticles; Cotton; Leaf worm; Nanopesticide; Agriculture. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4390 |
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| Adekanye, Timothy Adesoye. |
| Energy inputs and yield relationship in cassava production was investigated to establish correlation between inputs and output in cassava production in Nigeria. Production data of energy inputs and crop yields were collected from 54 cassava farms in twelve cassava producing villages through site visits, interaction with the farmers and physical measurements for three production seasons (2013-2016). The data were analyzed statistically. Amount of inputs per hectare were calculated and multiplied by coefficients of energy equivalents. Total energy inputs in cassava production in this study was 36,482.8 MJha-1 while average output of cassava tubers was 32, 022.6 kgha-1. Energy use ratio, energy productivity and specific energy of the surveyed farms were 4.9,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Energy ratio; Cassava; Output; Cobb-Douglas. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5659 |
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| ALVALÁ,REGINA C.S.; CUNHA,ANA PAULA M.A.; BRITO,SHEILA S.B.; SELUCHI,MARCELO E.; MARENGO,JOSÉ A.; MORAES,OSVALDO L.L.; CARVALHO,MAGOG A.. |
| ABSTRACT Drought is a natural and recurrent phenomenon. It is considered ‘a natural disaster’ whenever it occurs in an intensive manner in highly populated regions, resulting in significant damage (material and human) and loss (socioeconomic). This paper presents the efforts developed to monitor the impact of drought in the semiarid region of Northeast Brazil. In this scope, information from different sources is compiled to support the evaluation and identification of impacted municipalities, with the main objective of supporting emergency actions to mitigate their impact. In the semiarid region of Brazil there are frequent occurrences of dry periods during the rainy season, which, depending on the intensity and duration, can cause significant damage to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture; Drought impacts; Drought monitoring; Semiarid; Dry farming; Northeast Brazil. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000200502 |
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| Registros recuperados: 1.323 | |
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