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| Registros recuperados: 2.625 | |
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| Dahri, Shahzad Hussain; Mangrio, Munir Ahmed; Shaikh, Irfan Ahmed; Dahri, Zakir Hussain; Syed, Ain-ul-Abad; Jakhrani, Jazib Hussain; Syed, Taimoor Ali. |
| This experiment aimed to determine the crop evapotranspiration (ETc), groundwater input in total water used by wheat crop, and to simulate the CROPWAT model to envisage the crop evapotranspiration rate. To estimate on-field ETc and groundwater contribution the combining lysimeter technique was used. The water levels below the soil surface were kept at 1.60, 2.20, and 2.80 m and each water table depth was replicated three times. The experiment was conducted under silt loam (SL) and silty-clay loam (SCL) soil conditions. The climatic parameters and water balance components were recorded accordingly. The on-field ETc was compared with the predicted ETc by CROPWAT model. Under SL soil, the observed ETc was 442, 427, and 401 mm at the water table depth of 1.60,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water conservation; Irrigation amount; Groundwater; And Crop evapotranspiration. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6605 |
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| Sedighi, Shahryar; Kalantari, Davood; Shiukhy, Saeid; Rédl, Jozef. |
| Leaf spot disease is one of the most common fungal diseases that cause immense and sometimes irreparable damage to poplar trees. Therefore, in order to prevent the development of this fungal disease and to reduce its losses, identification and elimination of its pathogen (Septoria fungi) is very important. In this regard, conventional methods for detection of fungal contamination are time-consuming, costly and difficult. Therefore in this study, in order to distinguish healthy leaves from infected ones, as well as determining the rate of infection progress, a modified image processing algorithm by using the Laplacian threshold was used. Based on the results obtained in this study, the effect of illumination wavelength on the percentage of disease... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Image Processing; Machine Vision; Poplar Tree; Wavelength. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6601 |
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| Scariot, Maurício Albertoni; Rohrig, Bruna; Barok, Rafael Stefanhak; Dionello, Rafael Gomes; Radünz, Lauri Lourenço. |
| The aim of the study was to test the fit of different empirical mathematical models to experimental data obtained from the intermittent drying of rice grains paddy. To this end, the rice grains, IRGA 424 RI cultivar, were dried over cross flow dryer with a static capacity 580 kg of paddy rice, under intermittent operating system 1:1. They used the drying air temperatures of 55 and 65° C using as a heating source for burning dry and damp eucalyptus firewood with moisture contents of 12 and 32%, respectively. Every 30 minutes during the drying process were collected on temperature and humidity of environment as well as the temperature of the inlet and outlet of the dryer, beyond the moisture content and the temperature of the grains mass. 12 were tested... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L.; Removal of water; Empirical mathematical models; Midilli.. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5943 |
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| AHMAD, ABUBAKAR SABO. |
| Soil management using organic materials is one of the strategies of soil conservation and nutrients enhancement. This work evaluated the effect of organic materials (Poultry manure and Millet-chaff) on physio-chemical properties of soil at Agricultural and Environmental Engineering Departmental farm, Bayero University, Kano-Nigeria. Three different points were randomly selected and the soil samples were collected at (0-20 cm, 20-40 cm and 40-60 cm) making a total of nine samples. The physio-chemical properties of the soil samples were analyzed in the Laboratory and t-test was conducted to analyse the effect of these organic materials on soil physiochemical properties before and after application. Based on the analyses of the results, it was discovered that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Key Words; Physio-chemical; Organic materials; Poultry manure and Millet chaff. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6893 |
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| Filho, Marconi Seabra; MENEZES, ADEMIR SILVA; Sousa, Paulo Gleisson Rodrigues de; Neto, Luis Gonzaga Pinheiro; Azevedo, Benito Moreira; Viana, Thales Vinícius Araújo. |
| Sunflower (Helianthus annuus L.) stands out as the oilseed crop with the largest expansion in the world. Thus, the objective of this study was to evaluate the most appropriate moment to suppress irrigation, without hampering the productive and quality aspects of sunflower culture. The experimental design used was the randomized blocks, with six treatments and four replicates, where the treatments were as follows: irrigation up to 45, 52, 59, 66, 73 and 80 days after sowing. At 90 days after sowing, the following variables were analyzed: mass of 1000 seeds, productivity, dry mass of the chapter and stem, oil content of the seed and water use efficiency in the production of seed and oil. For the 1000 seed mass variable, a significant effect (p <0.05)... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7015 |
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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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| Dahri, Shahzad Hussain; Mangrio, Munir Ahmed; Mirjat, Muhammad Saffar; Dahri, Saeed Ahmed; Aqulani, Zaheer Ahmed; Jakhrani, Jazib Hussain; Aghani, Ghulam Mehdi. |
| This research was intended to determine the groundwater contribution in crop water-use of sesame crop under different water tables depths and to assess the accuracy of CROPWAT model to simulate the evapotranspiration. The method of combining Lysimeters was implemented to investigate seasonal groundwater contribution to crop-water use. The climatic conditions under which crop was grown were monitored, water table depths were maintained (at 1.60 m, 2.0 m and 2.40 m) and all water balance components were measured. The crop coefficient (Kc), ET and reference evapotranspiration (ETo) were determined. The obtained results were compared with the outputs of the CROPWAT model. The results reveals that, the average ET of sesame crop under lysimeter experiment was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lysimeter; CROPWAT; Sesame Crop; Evapotranspiration; Groundwater Use; And Crop Coefficient. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6267 |
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| Oyelaran, Olatunde Ajani. |
| Raw material costs are responsible for the greater percentage of biodiesel production cost. In this research chicken and guinea fowl wastes eggshell were used as feedstock for the producing heterogeneous catalyst for production of biodiesel. Proceeding their utilization, calcium oxide (CaO) was obtained by calcining the eggshells which contains calcium carbonate (CaCO3) in a muffle furnace at of 1000 for four hours. The solid oxide catalyst produced were then characterized by the Brunauer-Emmett-Teller (BET) and XRF methods. The activity of the produced catalyst in transesterification of calabash seed oil with methanol was assessed, and the properties of biodiesel obtained were evaluated. The various effect of reaction time, reaction temperature,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiesel; Eggshell wastes; Calcium oxide; Transesterification; Heterogeneous catalyst. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6155 |
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| Jin, Han; Kolar, Praveen; Peretti, Steven; Osborne, Jason; Cheng, Jay J. |
| There is significant interest in developing renewable solid base catalysts from agricultural wastes for use in the transesterification of fats into fatty acid methyl esters (FAME). In this study, an inexpensive base catalyst was synthesized by impregnating waste oyster shell with 50% sodium hydroxide solution, followed by calcination at 1000 ℃ for 3h. The resulting solid catalyst was used to catalyze transesterification of soybean oil. Transesterification using the catalyst was studied by systematically varying molar ratio (MR) (methanol to oil) and catalyst loading (CL). Results indicated that the highest FAME yield was 93.9% using MR of 12 and CL of 10%. Reusability tests suggested that the catalyst could be used for at least three runs without any... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5735 |
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| Miito, Gilbert John; Komakech, Allan John; Zziwa, Ahamada; Kiggundu, Nicholas; Kambugu, Robert. |
| Declining soil fertility is a challenge to sustainable agricultural production in sub-Saharan Africa with a case of Uganda. However, the large volumes of agricultural waste generated from pineapples can be converted into soil conditioners through vermicomposting. by the use of earthworms. Several types of agricultural waste have been studied extensively as vermicompost feedstock, but little work exists on pineapple waste. The objective of this study was to investigate the suitability of pineapple waste for vermicomposting. To achieve this, an assessment of the physicochemical properties of fresh, pre-composted pineapple waste, and the resultant vermicompost, and determination of the optimal feeding rate and stocking density were performed. The study... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pineapple waste; Vermicompost; Soil conditioner; Stocking density; Feeding rate. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6739 |
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| graham, william richard. |
| A study was carried out to determine the productivity of small holder irrigation in northwestern Nigeria. The objectives of this study were to evaluate the performance of small-scale irrigation systems in Nigeria using several performance indicators.On the average crop yields (mean; 3657.4 kg ha-1) for wheat fell within the lower range of expected yields reported for irrigated wheat. However, the farms studied produced fairly high yields (mean; 535.6 kg ha-1). This may be attributed to the resilience of the small-holder farmers and access to subsidized inputs.In terms of output per cropped area, the rice farms gave better results (mean; 2635.9 US$ ha-1) when compared to the wheat farms (mean; 1981.2 US$ ha-1). However, when considering output per unit... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop water productivity; Irrigation water management; Financial self sufficiency. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6385 |
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| Basunia, Mohammad Ali. |
| Three commonly cited models for drying of agricultural products i.e. Page, Approximate form of diffusion, and Exponential were compared for their ability to the fit the experimental drying data of whole limes based on the root mean square error of estimate (RMSE) of the measured and simulated moisture contents. The comparison shows the Page model is the most suitable model having average RMSE = 0.046 wet-basis (decimal) while the Approximate form of diffusion and the Exponential models have 0.132 and 0.128 wet-basis (decimal), respectively. This indicated that the Approximate form of diffusion and the Exponential models both have less fitting ability then the Page model for the entire period (> 7 days) of drying in 30 tests at different... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Best-fitted; Mathematical model; Whole limes; Drying. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6911 |
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| BELLEBNA, Yassine; Nemmich, Said; Nassour, Kamel; Tilmatine, Amar. |
| The major challenge today for the application of PEF in the industry has interest to increase the production capacity and improve the quality of food products. PEF pre-treatment is a multifactorial process. In addition to the electric field intensity, pulses number and the capacitor value, the configuration of the treatment chamber now presents a significant parameter in this process.Cylindrical and square parallelipedic treatment chambers (TC) are compared and their effect is studied with variation of electric field, number of pulses and capacitor value at frequency of 1Hz. The results show that the cylindrical treatment chamber showed higher beet juice yield with all studied parameters. The quality of extracted juice estimated in terms of absorbance at... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6465 |
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| Otim, Daniel; Smithers, Jeff; Senzanje, Aidan; van Antwerpen, Rianto; Thornton-Dibb, Sean LC. |
| Sugarcane in South Africa is grown on wide-ranging soils, sometimes in non-ideal climates and on steep topographies where soils are vulnerable to erosion. Sugarcane fields are protected against erosion through, inter alia, the use of engineered waterways, contour banks and spill-over roads. A comparison of design norms in the National Soil Conservation Manual and norms used in the sugar industry clearly shows discrepancies that need to be investigated. Furthermore, the sugar industry design nomograph was developed based on an unsustainable soil loss limit, does not include any regional variations of climate and the impact on soil erosion and runoff and does not include vulnerability during break cropping. The aim of this research was to develop and assess... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ACRU; Design norm; Soil and water conservation; Soil loss; Sugarcane; South Africa. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6047 |
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| I., Manta H.; D., James D.; I., Awu J.. |
| Green house effect and ozone layer depletion due continuous environmental pollution from fossil fuel has speed up the quest for search of alternative energy fuel. In recent year, biofouls has attracted much attention as a reliable substitute to fossil fuel. The objective of this study was to evaluate and characterize biofuel produced from Egusi vegetable oil by applying standard method of transesterification. This study was carried out at Processing and Storage Engineering Departmental (PSED) laboratory of National Centre for Agricultural Mechanization (NCAM), Ilorin Kwara State, Nigeria. The results of the proximate characterization of the produced Egusi vegetable oil shows crude protein, crude fibre, ether extract, moisture content, ash content and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egusi Vegetable Oil; Characterization; Transesterification; Methyl Esters; Biofuel. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6205 |
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| Alwan, salih kadhim. |
| The effect of local thresher machine on maize cultivar Rabie was observed based on some technical indicators, under two clearance of threshing cylinders (0.7 and 0.9mm) and three grain moisture content .The experiments were conducted in a factorial experiment under complete randomized design with three replications. The 0.9mm clearance was significantly better than 0.7mm clearance while the moisture content of grain at range of 13-15% was significantly superior to the other ranges of 15-17% and17%-19% in all studied parameters. For local THM the machine productivity, power consumption, threshing efficiency, grains damage ,broken corn, grain cleaning, were 1.251 th-1, 9.358 kW, 88.717; 1.529; 3.272; and 1.318 percent respectively. The interaction among ... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6225 |
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| UDOMSUP, JANYA. |
| This work presents a study for biomass possible to bring renewable energy in a swirling fluidized bed combustor (SFBC). The main objective of this experimental work was to study the biomass component and excess air of biomass. Palmyra palm shell, Leucaena (lam.), and Water hyacinth are using as fuel in the tests. Quartz sand of 600-850 µm and static bed height of 20 cm was used as inert bed material. For all of tests, the feed rate was fixed 45 kg/hr. for variable excess air (of 40 60 and 80%). As the experimental results, the temperature profiles in SFBC were obviously seen deviate when tests with higher excess air. In the test run, the highest cellulose (palmyra palm shell) for 80% excess air had CO and NO emissions were found in quite stable level (less... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Biomass Component; Efficiency; Emission; Fluidized-bed; Combustion; Swirling. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5945 |
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| Registros recuperados: 2.625 | |
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