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| Enrique Meseth; National Sun Yat-Sen University; Jason C.S. Yu; National Sun Yat-Sen University, Department of Marine Environment and Engineering, Lien-Hai Road 70, 80424 Kaohsiung, Taiwan. |
| The current work is aimed to improve the water management for agriculture, by applying efficient crop schedules in Vilcabamba -and similar areas of the Andean highland forest-, which can satisfy most of the water requirements with rainfed irrigation and maximise the crops yield. For this purpose, two field practices were carried out during the dry (September 2012) and wet season (February 2013) to measure rivers and canals flows with the velocity/area method. Nineteen soil samples were collected on-site and analysed, presenting prevalent sandy loam and loam textures. Cropwat programme and data on climate, crops and soil were used to estimate crop water requirements and scheme irrigation requirements, indicating that crop evapotranspiration is low due to... |
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Palavras-chave: Water management; Irrigation requirements Crop scheduling crop water requirements rainfed irrigation water management for agriculture Cropwat. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2750 |
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| A. Sobowale; Univesity of Agriculture, Abeokuta; J. K. Adewumi; University of Agriculture, Abeokuta; C. A. Okuofu; Ahmadu Bello University, Zaria; J. A. Otun; Ahmadu Bello Uniersity, Zaria. |
| A. Sobowale1, J. K. Adewumi1, J. A. Otun2, D. B. Adie2(1. Department of Agricultural Engineering, University of Agriculture, Abeokuta. Nigeria;2. Department of Water Resources Engineering, Ahmadu Bello University, Zaria. Nigeria) Abstract: A water audit of the Hadejia river sub-catchment of Komadugu Yobe River basin of Nigeria (KYB) has been carried out. The available water in this sub-catchment was compared with existing and potential water demands; results show that about 2,619 million cubic meters (MCM) of surface water is available annually upstream of Wudil (HS 1), 658 MCM is available between Wudil and Hadejia (HS 2), while 905 MCM is available between Hadejia and Gashua (HS 3). Analysis of direct ground water recharge... |
| Ano: 2010 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1065 |
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| Mostafa, Harby; El-Ansary, Mohamed; Awad, Montaser; Husein, Nora. |
| An experiment was performed for two seasons to test the impact of water stress and drip irrigation lateral arrangements on yield and water productivity of the sunflower crop (seed and oil). Water stress treatments were Full crop evapotranspiration 100% ETc (FI100), 80% ETc (DI80), 60%ETc (DI60) and 100-60 % ETc (DI100-60). The DI100-60 treatment was applied as 100 % ETc up to seed formation then reduced to 60% ETc. The drip irrigation lateral arrangements were single planting row per one drip line with 2 L h-1 drippers (T1) and double planting rows per one drip line with 4 L h-1 drippers (T2). Results revealed that applying water stress by either DI80 or DI100-60 produced almost the same or more yield of sunflower seeds and oil than that obtained from full... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6639 |
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| Hazarika, Manuj K. |
| Water uptake behavior of brown rice during soaking as a part of the process of producing ‘Komal Chawal’, a kind of no cooking rice tradition to the population in the State of Assam, India, is modelled to Fick’s diffusion equation. Grain swelling resulting from water uptake is accounted by the moving boundary formulation. The model is applied to hydration data of brown rice at soaking temperatures of 40 – 65oC, with saturation moisture content estimated from experimental hydration data. Dependence of effective diffusivity on temperature and moisture content is expressed as a factor estimated from enthalpy-entropy compensation of moisture sorption behavior. Model fitting yielded values of effective diffusivity in a range 2.48 x 10-11 – 1.21 x 10-10 m2/s.... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4608 |
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| Wicaksono, Fiky Yulianto; Muhamad, Kadapi; Nurmala, Tati. |
| It is essential to evaluate the efficiency of water supply on varieties of crop, such as Coix lacryma-jobi L. (hanjeuli), particularly in water management. Coix lacryma-jobi L. (hanjeuli) is one of the crops that were not listed for Kc values to estimate the crop water use by CROPWAT ver 8.0. However, this study using the Kc values of sugar cane as approach to reveal actual evapo-transpiration. Hanjeuli comprises two varieties, namely stenocarpa and ma-yuen, which were used in this study to observe the water requirement for irrigation when cultivating agricultural products in a loamy soil using CROPWAT. The ETa (mm/day) generated by CROPWAT was used to calculate the sprinkler operation time (T+0.5, hour/day). The results showed that the trend of T+0.5... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6943 |
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| Rohani, Abbas. |
| In recent decades, different technologies such as image processing, spectral processing, and ultrasound techniques have been used to detect various weed species. In this paper, in addition to reviewing the conventional methods of weed detection, an alternative method based on processing of ultrasonic signals is introduced. In this regard, with the aid of a proper setup with the capability of sending and receiving 40 kHz ultrasonic waves, five weed species namely namely Portulacacea, Chenopodiumalbum L., Tribulusterrestris L., Amaranthusretroflexus L. and Salsolaiberica were identified .The continuous 40 kHz ultrasonic waves are sent to weed canopy and received back by an ultrasonic receiver. These signals are then transferred to a laptop (DELL INSPIRON... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7525 |
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| Dawood, Mona Gergis. |
| Two field experiments were conducted during the winter seasons of 2014/2015 and 2015/2016 at the agricultural experimental station of the National Research Centre, Nubaria, Egypt. Field evaluation of the efficiency of weed-control treatments (unweeded, oxadiargyl, metribuzin and two hand hoeing) and bio-stimulants levels (folic acid at the rate of 10, 20 and 30 mg/L, and seaweed extract 100, 200 and 300 mg/L) and their interactive effects on faba bean growth, yield, yield attributes and chemical composition of seeds. Two hand hoeing achieved the highest weed depression expressed in the lowest dry matter of broadleaved, narrow-leaved and total weeds. Also, two hand hoeing was the most superior treatment in increasing plant height, shoot dry weight, leaf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicides; Seed yield; Folic acid; Seaweed; Vicia faba; Nutritive value. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4376 |
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| Menguito, Jerson Jose Talag. |
| The study involved the fabrication and formulation of an alternative system that use natural frequency analysis for weight measurement of mango fruits. The system was mainly composed of an ADXL345 accelerometer, Arduino UNO board, stainless steel cantilever beam, frames and breadboards, and two developed program algorithms.The Frequency Detector (FD) and Frequency and Weight Detector (FWD) algorithms were written using National Instruments LabVIEW 2014. Thirty (30) carabao mango fruits of varying sizes were used during testing. The actual weights of the samples were obtained using a digital weighing scale. Size classification of each mango fruits based on actual weight and based on the weights predicted by the system involving natural frequency analysis... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4843 |
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| Mohammadi, Ali; kheiralipour, Kamran; Ghamary, Bahram; Jahanbakhshi, Ahmad; Shahidi, Reza. |
| Whole body vibration is one of the main causes of musculoskeletal disorders of drivers. The purpose of this study was to investigate the allowable exposer time, the care limit and driver response to the vibrations of the seat of ITM 475 Tractor. A three-way accelerometer was used to carry out the tests in the present study based on the ISO 2631-1 international vibration standard. The studied factors were engine rotational speed at three levels of 1000, 1500 and 2000 rpms, gear ratio (1, 2 and 3) and road at two level, dirt and asphalt. The obtained data were analyzed through factorial experiment based on completely randomized design with 18 treatments and three replications. The results showed that effects of the main factors and those of their... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2023 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8467 |
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| Kasisira Lukoda Levi; duPlessis Ronnie. |
| Some of the mathematical force models employing limit equilibrium analysis are based on the soil-volume tilled to predict the draft requirements of a tillage tool. At the same time, such models require a preliminary assumption of the soil failure pattern ahead of the tool. It is imperative therefore to accurately determine the dimensions of the idealized soil-failure model to ensure accurate prediction of the soil-volume tilled and thus the tillage-tool draft requirements. Among the commonly idealized models, is the model that divides the soil failure ahead of a simple tillage tool into a center wedge and a side circular crescent on each side of the tool. However, the available model for determining the maximum width of the side circular crescent was found... |
| Ano: 2009 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1334 |
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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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| M. Ehrl; H. Auernhammer. |
| Satellite based guidance technology is a very challenging principle for future automation of agricultural machinery. The first generation types of systems are primarily self-contained solutions and added to the existing system set-up of the tractor. As being an important step towards robotics in agricultural machines, a better integration of this technology into the mechanical, hydraulic and especially the electronic architecture is a major issue. In principle, there are two main strategies for the integration. One is a concept based on a proprietary, manufacturer specific approach. The other one is to map as many functions as possible into the just state of the art becoming open and standardized ISOBUS. Within this paper, the capabilities of ISOBUS to be... |
| Ano: 1969 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/933 |
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| Afzalinia, Sadegh; Dehghanian, Sayed Ibrahim. |
| Objective of this study was to evaluate the interaction effect of conservation tillage and irrigation methods on the soil properties, crop yield and water productivity in wheat-maize cropping system. A split plot experimental design with three replications was used to conduct this study in Fars province, Iran. Surface irrigation, drip tape irrigation, and sprinkler irrigation were considered as main plots, and no-tillage, reduced tillage, and conventional tillage were considered as sub plots. Results showed that surface irrigation had the maximum wheat yield on average and the maximum maize yield was obtained from drip tape irrigation on average; while, tillage methods had no significant effect on crops yield. Results also indicated that the maximum water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop residue; Maize; Irrigation systems; Tillage methods; Water use; Wheat. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7017 |
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| Shamsabadi, Hossein-Ali Tash; Ahmad, Desa; Azmi, Yahya. |
| A field experiment was conducted to investigate the effects of the three tillage systems and three corn plant populations on selected soil physical properties and yield components of sweet corn for Serdang soil series (Typic Paleodults) at the Research Farm of University Putra Malaysia (UPM) in Malaysia. The experimental design was a 2×3 factorial treatments based on Randomized Complete Block Design (RCBD) for soil analysis and a 3×3 factorial treatment based on RCBD for yield and yield components of sweet corn (Zea mays) analysis with three replications. The three tillage systems were moldboard plow followed by once disc harrowing (MPD), disc plow followed by once disc harrowing (DPD) and rotary cultivator (RC) only, as control on soil physical properties... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land preparation; Soil Physics; Sweet Corn; Yield.. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4082 |
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| Registros recuperados: 1.540 | |
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