scholarly journals IRRIGAÇÃO LOCALIZADA POR GRAVIDADE COM MICROTUBOS

Irriga ◽  
2006 ◽  
Vol 11 (2) ◽  
pp. 266-279 ◽  
Author(s):  
Rodrigo Otávio Rodrigues de Melo Souza ◽  
Gerardo Felipe Espinoza Pérez ◽  
Tarlei Arriel Botrel
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Water Reservoir ◽  
The Other ◽  
Trickle Irrigation ◽  
Total Cost ◽  
Great Performance ◽  
Distribution Uniformity ◽  
Two Phases ◽  
The Cost

IRRIGAÇÃO LOCALIZADA POR GRAVIDADE COM MICROTUBOS  Rodrigo Otávio Rodrigues de Melo Souza; Gerardo Felipe Espinoza Pérez; Tarlei Arriel BotrelInstituto Centro Tecnológico de Ensino – CENTEC, Fortaleza, CE,  [email protected]  1 RESUMO             Os objetivos deste trabalho foram: dimensionar, implantar e avaliar um sistema de irrigação com microtubos por gravidade; e apresentar o custo do sistema com microtubos comparando-o com o custo do “kit” para irrigação localizada por gravidade, disponível no mercado. O experimento foi dividido em duas etapas, sendo que a primeira consistiu no dimensionamento, elaboração, montagem e avaliação do sistema de irrigação. A segunda etapa consistiu na implantação da cultura da alface em três canteiros, onde em dois canteiros a água foi fornecida por uma caixa d’água elevada a uma altura de1 m e distribuída para as alfaces através dos microtubos. No outro canteiro, a irrigação foi realizada através de um regador. Conforme os resultados observados o sistema obteve ótimo desempenho. Além de aplicar água com 97% de uniformidade de distribuição, também ficou provado que o microtubo foi fabricado com qualidade e uniformidade. O custo total do sistema para a irrigação de 16 canteiros ficou em R$ 466,77. A proposta de utilização do sistema de irrigação localizada com microtubos por gravidade demonstrou ser uma alternativa viável, tanto tecnicamente quanto economicamente, para os pequenos produtores. UNITERMOS: Irrigação por gotejamento, microtubos, baixa pressão  SOUZA, R.O.R. DE M.; PÉREZ, G.F.E.; BOTREL, T.A. GRAVITY TRICKLE IRRIGATION WITH MICROTUBES  2 ABSTRACT             The objectives of this study were to design, implant and evaluate a gravity irrigation system with micro tubes; and to show the cost of the system with micro tubes compared to the cost of the “kit” for gravity drip irrigation commercialized by irrigation companies. The experiment was divided into two phases: the first one consisted of the design, elaboration, assembly and evaluation of the irrigation system, whereas the second one consisted of the implantation of a lettuce culture in three flowerbeds. The water was provided by a1 mhigh water reservoir and distributed to the lettuce culture through micro tubes in two of the flowerbeds. In the other one, the irrigation occurred through a watering can. According to the results, the system achieved a great performance. Besides applying water with 97% distribution uniformity, it has also been proved that the micro tube manufacturing had quality and uniformity. The total cost of the irrigation system implementation in 16 flowerbeds was US$ 190.51. The use of gravity trickle irrigation system with micro tubes turned out to be a possible technical and economic option for small farmers. KEYWORDS: drip irrigation, low pressure, microtubes 

scholarly journals Effect of Pulse Drip Irrigation Duration on Water Distribution Uniformity

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2276
Author(s):  
David Lozano ◽  
Natividad Ruiz ◽  
Rafael Baeza ◽  
Juana I. Contreras ◽  
Pedro Gavilán
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Crop Yields ◽  
Irrigation System ◽  
Irrigation Schedule ◽  
Sandy Soils ◽  
Field Evaluation ◽  
Irrigation Performance ◽  
Standard Procedures ◽  
Distribution Uniformity

Developing an appropriate irrigation schedule is essential in order to save water while at the same time maintaining high crop yields. The standard procedures of the field evaluation of distribution uniformity do not take into account the effects of the filling and emptying phases of the irrigation system. We hypothesized that, in sloping sandy soils, when short drip irrigation pulses are applied it is important to take into account the total water applied from the beginning of irrigation until the emptying of the irrigation system. To compute distribution uniformity, we sought to characterize the filling, stable pressure, and emptying phases of a standard strawberry irrigation system. We found that the shorter the time of the irrigation pulse, the worse the distribution uniformity and the potential application efficiency or zero deficit are. This effect occurs because as the volume of water applied during filling and emptying phases increases, the values of the irrigation performance indicators decrease. Including filling and emptying phases as causes of non-uniformity has practical implications for the management of drip irrigation systems in sloping sandy soils.

scholarly journals Electronic Voting in Indonesia: Head of Village Election

2018 ◽  
Vol 4 (2) ◽  
pp. 73
Author(s):  
Adityo Pratikno Ramadhan ◽  
Anita Pebri Fitriani ◽  
Sugeng Suharto ◽  
Titiek Kartika Hendrastiti
Keyword(s):  
Modern Technology ◽  
The Other ◽  
Primary Data ◽  
Electronic Voting ◽  
Total Cost ◽  
The People ◽  
Voting System ◽  
Electronic Voting System ◽  
The Cost ◽  
The Village

What if electronic voting performs in a rural area that has a limited condition of infrastructure and people who are peculiar with technology such as a computer? This article answers this question. Elections in Indonesia at national, province and district level are still used ballot paper. However, there is a village in Indonesia that use remote electronic voting system as a tool to vote head of the village. This research used the interview as a primary data collection and this research interviewed 17 key informants that directly involved in the village electronic voting. The research found the village voters more convenient in an electronic voting than the ballot paper system and the electronic voting can perform in a place that the people not familiar with modern technology. The unique finding of this research is the cost for electronic village election came from the village head candidates that shared the total cost of electronic voting. The other findings are electronic voting can be performed in an area with limited infrastructures and community that peculiar with technology.hence, it is possible for Indonesia to implement electronic voting in a level that higher than village voting, such as regent or mayor election.

scholarly journals The Effectiveness of Semi-Natural Rearing of Coho Salmon (Oncorhynchus kisutch) at the Nitinat River Hatchery, British Columbia

2014 ◽  
Vol 7 (1) ◽  
pp. 23-28
Author(s):  
Robert Brouwer ◽  
Amanda Ross ◽  
Ian Trepanier ◽  
Ronald W. Tanasichuk
Keyword(s):  
British Columbia ◽  
Survival Rate ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
The Other ◽  
Adult Fish ◽  
Male And Female ◽  
Rearing Method ◽  
Two Phases ◽  
The Cost

We compared: 1) rearing mortality, 2) size at release (mean length), 3) jack, male and female sizes, and 4) jack, female, and adult returns of coho salmon (Oncorhynchus kisutch) from three consecutive brood years reared at the Nitinat River hatchery using a conventional or a semi-natural rearing method. The semi-natural method included feeding restrictions, shading of the rearing ponds, lower rearing temperature and rearing densities, exposure to a predator and a volitional release. We found no significant effects of brood year or rearing method on rearing mortality; it was significantly lower during the marking to release phase than during the other two phases (eyed-egg to ponding, ponding to marking). Conventionally reared smolts were significantly longer. Conventionally reared males were longer. As a proportion of number of smolts released, semi-natural rearing produced 86% fewer jacks, the same proportion of females and 15% more adults. Adult production trends, described as marine survival rate (returning adults • smolt-1) for Nitinat River Hatchery coho, and as ln recruits • female spawner-1 for a nearby wild coho population, were similar. Jacking rates were lower in Nitinat River hatchery coho than for the nearby wild coho population. We concluded that the semi-natural rearing methodology produces adult fish more efficiently than the conventional rearing method does, and at 73% of the cost.

scholarly journals The Cost Potential of Shallot in Rasi Salai District, Sisaket Province

2021 ◽  
Vol 58 (1) ◽  
pp. 3905-3908
Author(s):  
Piyachat Thongpaeng, Jeeranan Wongwatanyoo, Apinya Bhumsaidon
Keyword(s):  
General Information ◽  
The Other ◽  
Average Price ◽  
Average Income ◽  
Educational Levels ◽  
Total Cost ◽  
Primary Level ◽  
Research Findings ◽  
The Cost

This research aimed to study the cost potential of shallot in Rasi Salai District, Sisaket Province in order to lead to planning on pricing, marketing, improving the quality of shallot and analyzing data of farmers and shallot production. The research findings on the general information of shallot farmers revealed that they consisted of 75% of males and 25% of females with 40-49 years of age or 50%. Most of their educational levels were 55% of primary level or lower. They grew shallot together with other crops. The Bang Chang varieties (local shallot varieties of Sisaket Province) were grown most of 75% and the other 25% of local northern verities called Hom Bua. The 70% of planting shallots were harvested from the last season and the other 30% were purchased from other farmers in the market.  The shallot productivity per rai was uncertain depending on the caring, fertilizing and disturbing disease. Approximately 35% of the farmers harvested 1,200-1,500 kilograms per rai or 25%. Regarding the production cost of shallot, it was found that the average mount was 8,151.5 baht per rai with the highest amount of verities of 3,250 baht per rai or 15.2%. The cost of insecticide was 1,000 baht or 10.2% of the total cost. In addition, the least cost was transportation for 3.3% only because most merchants bought shallots at the farming sites.  According to sale data, 70% of the farmers sold local verieties of Sisaket Province with average price of 30 baht per kilogram, followed by 15% of Hom Bua with an average price of 45 baht per kilogram. The average income earned by farmers in each household was different at 20,001-25,000 baht per rai

scholarly journals Head and lateral length on water distribution uniformity of a PVC drip irrigation system

2014 ◽  
Vol 9 (30) ◽  
pp. 2298-2305 ◽  
Author(s):  
Evans ASENSO ◽  
Jiuhao LI ◽  
Hai-Bo CHEN ◽  
Emmanuel OFORI ◽  
Fuseini ISSAKA ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Irrigation System ◽  
Drip Irrigation System ◽  
Distribution Uniformity ◽  
Lateral Length

scholarly journals Feasibility study of gravity drip irrigation for small scale farmers

2020 ◽  
Vol 13 (2) ◽  
pp. 179-187
Author(s):  
Abhishek Mishra ◽  
Arpan Sherring
Keyword(s):  
Water Resources ◽  
Feasibility Study ◽  
Drip Irrigation ◽  
Agricultural Production ◽  
Irrigation System ◽  
Small Scale ◽  
Vegetable Crops ◽  
Distribution Uniformity ◽  
Small Scale Farmers ◽  
Set Up

Gravity fed drip irrigation techniques have been used in the small agricultural production as an advanced water saving irrigation method in recent times. However advantageous this method, there are still some difficulties in projecting the efficiency of such systems. Most especially, feasibility study of gravity drip irrigation for small scale farmers is very important in order to set up an efficient irrigation system. This study is focused to test the feasibility of the drip irrigation the experiment was run and Uniformity co-efficient and Distribution uniformity. In the study, the discharge of emitters at 1.0 m and 0.5 m emitter spacing and 1.0 m lateral spacing and for four irrigation durations (15 minutes, 30 minutes, 60 minutes and 120 minutes) was measured. The results clearly indicates that the selected emitters of 4 LPH rated discharge and 2.0 kg/cm2 pressure when used under gravity drip irrigation and at about 0.5-0.8 kg/cm2 pressure, discharges between 1.8-2.5 LPH. 6. The gravity drip irrigation can meet the water requirement of vegetable crops with acceptable UC and DU and can be a better solution for small scale farmers of the region in order to save the scarce fresh water resources.

scholarly journals Application of air energy heat pump in brood production of closed yellow-feathered chicken house

2021 ◽  
Vol 245 ◽  
pp. 01036
Author(s):  
Hu Chenming ◽  
Pen Han ◽  
Yang Li ◽  
Yang Chaowu ◽  
Xiong Xia ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Heating Rate ◽  
Heat Pump ◽  
Co2 Concentration ◽  
Production Performance ◽  
The Other ◽  
Brood Production ◽  
Significant Difference ◽  
Distribution Uniformity ◽  
The Cost

The aim of the study was to compere the effects of using air energy heat pump, flue heating and water heating as brood heating system on brood production of yellow-feathered broilers. In the experiment, three heating methods were used to heat chicks, and the parameters such as heating time, temperature uniformity, concentration of poisonous and harmful gases in the house, chick weight gain, mortality rate and production benefit were compered and analyzed. The results showed as follows: 1. There was no significant difference in NH3 and H2S concentration among the three groups (P > 0.05). The CO2 concentration in the flue group was significantly higher than that in the other two groups (P < 0.01), and there was no significant difference in CO2 concentration between the other two groups (P >0.05). 2. The body weight of chickens in the flue group at 30 days of age was the lowest, which was significantly different from that in the other two groups (P < 0.01); The air energy heat pump group had significant difference with coal fired boiler group (P < 0.05), the uniformity and survival rate of flue group were the lowest, and the air energy heat pump group had the best; 3. The temperature rise of honeycomb flue was the slowest, the temperature distribution uniformity was the worst, and the cost was the highest; The heating rate of coal-fired boiler was faster than that of flue, and the temperature distribution uniformity was better, and the cost was lower. The heating rate of air energy heat pump was the fastest, and the temperature distribution uniformity was better, and the operating cost was the lowest. 4. The air energy heat pump group has higher investment in the early stage, better use effect, better production performance of brood, long service life and lower brood cost.

scholarly journals Effect of pipe type and Emitters discharge on performance criteria of surface drip irrigation system

2021 ◽  
Vol 904 (1) ◽  
pp. 012013
Author(s):  
B A AL-Dulaimi ◽  
Sh M AL-Mehmdy
Keyword(s):  
Coefficient Of Variation ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Performance Criteria ◽  
Research Station ◽  
Operating Pressure ◽  
Drip Irrigation System ◽  
Design Discharge ◽  
Distribution Uniformity ◽  
Surface Drip Irrigation

Abstract A field experiment was conducted in Jazeerah Al-Ramadi/Al-Hamidiyah research station (latitude33^o 27^’ 〖 11.9 〗 ^(՚՚)N, longitude 43^o 23^’ ^(՚՚) E (duration 2020. This study was conducted to investigate the effect of pipe types and emitters discharge on performance criteria of surface drip irrigation system. Therefore, a two factorial experiment was set as randomized complete block design with three replications. The first factor included the type of pipes and emitters, namely Turbo, GR and T-Tape. While the second factor involved the emitters discharge which consist of two levels i.e., 4 (D4) and 8 (D8) L.h-1. The irrigation system was initially evaluated in the field before planting by testing three operating pressures (50, 100 and 150 Kpa) to determine the actual discharge of the emitters closed to their design discharge (4 and 8 L.h-1) for each emitter to calculate the manufacturing coefficient of variation (CV), distribution uniformity and the discharge variation ratio at each operating pressure. Results showed that the best discharge (Closed to design discharge of 4 L.h-1) was obtained at the 50 Kpa operating pressure which gave 3.99,3.90 and 3.81 L.h-1 when using the T-Tape pipe and GR and Turbo emitter compare when the discharge of 8L.h-1 has been used which gave 7.96, 7.84 and 7.59 L.h-1 when the former pipe and emitters were used. The best coefficient of variation was observed when the T-Tape pipe and GR and Turbo emitter were used with discharge of 4 L.h-1 up to 0.1300, 0.2200 and 0.2600 compare to 0.1300, 0.2700 and 0.3500 when the same former pipe and emitters were used with discharge of 8L. h-1. Similarly, the best distribution uniformity was obtained when the T-Tape pipe and GR and Turbo emitter has been used with discharge of 4 L.h-1 which gave 94.68, 91.74 and 90%. Likewise, the most acceptable variety discharge ratio was observed when the same prior pipe and emitters were used with discharge of 4 L.h-1 by giving 7.23, 11.90 and 12.19 %.

scholarly journals Cost of a drip irrigation system for vegetable farming in Puerto Rico

1969 ◽  
Vol 72 (1) ◽  
pp. 31-40
Author(s):  
Tillak Persaud ◽  
Megh R. Goyal ◽  
Philippe Bellerive
Keyword(s):  
Puerto Rico ◽  
Computer Program ◽  
Drip Irrigation ◽  
Irrigation System ◽  
First Year ◽  
Drip Irrigation System ◽  
Initial Cost ◽  
Vegetable Farming ◽  
The Cost ◽  
Pump House

This report presents the cost of a drip irrigation system for vegetable farming in Puerto Rico. The total initial cost of establishing an automatic drip irrigation system on a 4.36 hectare farm was $28,639.03, 10.79% of which was for pump house facilities; 3.1% for filter with accessories; 2.95% for chemigation facilities; 81.38% for in field materials; and 1.75% for installation. The first year cost per hectare was $1,976.72, which included depreciation, interest, maintenance and installation. A computer program was developed to calculate these costs.

scholarly journals Field Evaluating of Wetting Pattern from Surface Drip Irrigation System for Sand and Sandy Loam Soils

2019 ◽  
Vol 26 (2) ◽  
pp. 19-27
Author(s):  
Ahmad Dnan Abbass ◽  
Hayder A.K. AL-Thamiry
Keyword(s):  
Hydraulic Conductivity ◽  
Drip Irrigation ◽  
Sandy Loam ◽  
Irrigation System ◽  
Saturated Hydraulic Conductivity ◽  
Average Error ◽  
Initial Water Content ◽  
Good Prediction ◽  
Trickle Irrigation ◽  
Wetting Pattern

Water distribution through soils from trickle source is very important issue since it affects irrigation efficiency, wetted surface area and wetted soil profile. Many attempts to determine wetting pattern under drip irrigation using mathematical and numerical models were carried out. The verification of the validity of which model will be suitable for Iraqi soils need a detailed study. In this paper, the field work measurements of wetted pattern in two Iraqi soils (sand and sandy loam) were conducted to investigate the validity of the application of wetting pattern formulas predicted by Dawood (2016), Amin and Ekhmaj, (2006) and Schwartzman and Zur (1986). The work was divided into two parts: the first one was the laboratory work of soil texture, field capacity, permanent wilting point, and soil porosity. The second one includes field operations through landing, installation of trickle irrigation system, installation of equipment’s and sensors, adjustment of emitter discharge by the valve on the supply pipe. In each run, initial water content was measured and the system was operated for three continuous hours with three different discharges, discharges were selected as 1, 3 and 6 l/hr. the wetted diameter and depth were recorded hourly during each run test .The field measurements of wetted area were compared with that predicted by the previous studies. The obtained result indicate that the value of the wetted diameter and depth increase with increasing of water contents, the wetted diameter are inversely proportional was saturated hydraulic conductivity, and the wetted depth was directly proportional to the saturated hydraulic conductivity. Amin and Ekhmaj 2006 formula was suitable for wetted depth in sandy loam soil with average error 13.40% and Schwartzman and Zur, 1986 formulas gave a good prediction for wetted diameters with average error 12.79% for same soil. Finally Dawood (2016) formulas were more suitable than others for sand soil with average error for wetted diameter and depth 11.49%, 16.79% respectively.

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