Treadle pump: A low cost irrigation option for marginal farmers

2018 ◽  
Vol 5 (03) ◽  
Author(s):  
ATIQUR RAHMAN ◽  
ASHUTOSH UPADHYAYA ◽  
BP BHATT
Keyword(s):  
Low Cost ◽  
Water Productivity ◽  
High Water ◽  
Water Saving ◽  
Age Group ◽  
Male And Female ◽  
Human Power ◽  
Dry Spells ◽  
Supplementary Irrigation ◽  
Land Holdings

The population of marginal farmers in India is bound to increase due to continued division of farm holdings. Characteristically, marginal farmers are having more family labours but the production and productivity of their land holdings is low. The foremost reason behind this is the erratic rainfall and lack of assure supplementary irrigation during long dry spells. This paper presents the scope and applicability of a diaphragm based treadle pump in Bihar where groundwater is abundant and available at shallow depths round the year. Therefore, this pump could be very useful for marginal farmers in improving production and productivity of their tiny piece of land, as it uses human power and can be operated by male and female of age group 32- 45 years and lifts water from a depth ranging from 0- 30 feet. The water saving technologies such as bucket kit drum kit etc. could be used with this pump to irrigate the crops with high water productivity.

scholarly journals Water Saving Irrigation in Rice Cultivation with Particular Reference to Alternate Wetting and Drying Method: An Overview

2010 ◽  
pp. 128-136
Author(s):  
MM Husain ◽  
M Shahe Alam ◽  
MH Kabir ◽  
AK Khan ◽  
MM Islam
Keyword(s):  
Weed Management ◽  
Low Cost ◽  
Water Productivity ◽  
Rice Variety ◽  
Water Saving ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Irrigation Practice ◽  
Weed Infestation ◽  
Irrigation Cost

In the context of global energy crisis and water scarcity, rice production system is undergoing changes with the strategy to produce more rice with lesser amount of water. Water saving technology has therefore, been developed and increasingly adopted to irrigate rice in different countries. Impact of alternate wetting and drying (AWD) irrigation as a water saving technique on rice yield, water productivity and environment has been overviewed in this paper. On-farm trials were conducted during the years 2007 and 2008 to validate the adaptability of AWD method of irrigation in Boro rice-variety BRRI dhan29. The trials were conducted at different locations of Gazipur, in which three farmers’ plots of rice were irrigated following AWD method, which were then compared with another 3 farmers’ plots of rice irrigated in conventional method maintaining 3-5 inches of standing water throughout. The trials have revealed that AWD method saved about 365 mm irrigation water (about 27%) over the conventional irrigation practice. However, there was no adverse effect of AWD- irrigation on grain yields of rice. AWD method as perceived by farmers, although reduced irrigation cost, resulted in more weed infestation and was associated with more weeding cost. Following the impressive results of the validation trials, the demonstrations were conducted in the farmers’ fields of different districts during boro 2009. In general, the demonstrations were successful to impress the farmers about AWD-irrigation as a water saving and low-cost irrigation method. However assurance of timely availability of irrigation is a precondition for farmers to adopt the technique and weed management using appropriate herbicides is necessary for adoption of the technology.

scholarly journals Evaluation of Physical and Economic Water-Saving Efficiency for Virtual Water Flows Related to Inter-Regional Crop Trade in China

2018 ◽  
Vol 10 (11) ◽  
pp. 4308
Author(s):  
Jing Liu ◽  
Yu Zhang ◽  
Zhongbo Yu
Keyword(s):  
Water Productivity ◽  
Virtual Water ◽  
High Water ◽  
Water Saving ◽  
Trade Patterns ◽  
Water Savings ◽  
Cropping Patterns ◽  
Water Flows ◽  
Water Right ◽  
Water Compensation

If products were traded from regions with relatively high water productivity to regions with relatively low water productivity, water saving could be achieved. In this study, two indices—physical water-saving efficiency (volume of water savings per cubic meter of virtual water flows) and economic water-saving efficiency (value of water savings per cubic meter of virtual water flows considering water right trading)—were proposed to analyze the efficiency of inter-regional virtual water flows related to crop trade in China. Results indicated that the volume of inter-regional virtual water flows was 1.61 × 109 m3, more than 90% of which was occupied by oil-bearing crops, cereals, and beans. In terms of physical efficiency, only cereals and vegetables presented negative values. All kinds of crop trades were economically efficient, while most crops’ economic water-saving efficiency was less than 10 × 103 Yuan/m3. The application of advanced water-saving technologies, the cultivation of new crop varieties, the adjustment of regional cropping patterns, or consumption and trade patterns, could contribute to more water savings and higher physical water-saving efficiency, while the possible social, economic, and environmental tradeoffs should be considered simultaneously. Water right trading and virtual water compensation could contribute to sustainable water consumption, and full-cost pricing should be adapted in the future.

Socio-Economic Profile of Farm Households in Cotton Belt of Rural Punjab

2020 ◽  
pp. 144-151
Keyword(s):  
Secondary Level ◽  
Farm Households ◽  
General Category ◽  
Age Group ◽  
The Family ◽  
Working Age ◽  
Economic Profile ◽  
Land Holdings ◽  
Average Size ◽  
Cotton Belt

This paper examined the socio-economic profile of farm households in the cotton belt of Rural Punjab. The result revealed that as a whole, more than two-thirds fall in the working-age group of 15-59 years. The average size of the family worked out to be 5.74 and the average size of owned land holdings was 11.50 acres. The data highlights that 34.96 percent were earners, 31.39 percent were earning dependents and 33.65 percent of the persons were dependents. The major proportion (88.46 percent) of total sampled households followed Sikhism and as many as 87.50 percent were from the general category. About 23 percent of the sampled persons were illiterate and literacy levels were found to be positively linked with the size of landholdings. About 34 percent of the heads of sampled farmer households were illiterate and the majority of the heads of sampled farmer households had education below secondary level. None of the heads among marginal farmers had obtained education up to graduation level, whereas, this proportion was 7.41 for the large farmers. The study points out that overall only 11.54 percent of the sampled farm households read the newspaper. There is a need for effective measures which could enhance the educational and awareness levels of farmers and their family members for raising their levels of living.

scholarly journals Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1204
Author(s):  
Mengna Chen ◽  
Xuelong Chen ◽  
Caiyan Zhang ◽  
Baozheng Cui ◽  
Zewen Li ◽  
...  
Keyword(s):  
Water Absorption ◽  
Low Cost ◽  
High Water ◽  
Kinetic Mechanism ◽  
Swelling Kinetics ◽  
Synthesis Conditions ◽  
Ph Tolerance ◽  
Monovalent Salt ◽  
Infrared Spectrometer ◽  
Pseudo Second Order

One type of low-cost and eco-friendly organic‒inorganic superabsorbent composite (SAPC) was synthesized by free radical polymerization of acrylic acid (AA), starch (ST), sodium alginate (SA) and kaolin (KL) in aqueous solution. The structure and morphology of the SAPC were characterized by Fourier transform infrared spectrometer (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The influence of different reaction conditions on water absorption of SAPC, i.e., SA and KL contents, AA neutralization degree (ND), potassium persulfate (KPS) and N, N′-methylenebisacrylamide (MBA) loading were systematically studied. Under the optimal synthesis conditions, very high water absorption of 1200 g/g was achieved. The swelling kinetic mechanism of SAPC was studied by pseudo-second order swelling kinetics model and Ritger‒Peppas model. The performances of SAPC under different environments were tested and results revealed that this new SAPC had excellent swelling capacity, high water retention, good salt tolerance in monovalent salt solution (NaCl solution) and good pH tolerance between 4 and 10.

scholarly journals Reinforcement of Recycled Aggregate by Microbial-Induced Mineralization and Deposition of Calcium Carbonate—Influencing Factors, Mechanism and Effect of Reinforcement

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 887
Author(s):  
Chunhua Feng ◽  
Buwen Cui ◽  
Haidong Ge ◽  
Yihong Huang ◽  
Wenyan Zhang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Global Economy ◽  
Low Cost ◽  
High Water ◽  
Strengthening Mechanism ◽  
Recycled Aggregate ◽  
Strengthening Effect ◽  
Calcium Carbonate Precipitation ◽  
Environmental Friendliness ◽  
Advantages And Disadvantages

Recycled aggregate is aggregate prepared from construction waste. With the development of a global economy and people’s attention to sustainable development, recycled aggregate has shown advantages in replacing natural aggregate in the production of concrete due to its environmental friendliness, low energy consumption, and low cost. Recycled aggregate exhibits high water absorption and a multi-interface transition zone, which limits its application scope. Researchers have used various methods to improve the properties of recycled aggregate, such as microbially induced calcium carbonate precipitation (MICP) technology. In this paper, the results of recent studies on the reinforcement of recycled aggregate by MICP technology are synthesized, and the factors affecting the strengthening effect of recycled aggregate are reviewed. Moreover, the strengthening mechanism, advantages and disadvantages of MICP technology are summarized. After the modified treatment, the aggregate performance is significantly improved. Regardless of whether the aggregate was used in mortar or concrete, the mechanical properties of the specimens were clearly improved. However, there are some issues regarding the application of MICP technology, such as the use of an expensive culture medium, a long modification cycle, and untargeted mineralization deposition. These difficulties need to be overcome in the future for the industrialization of regenerated aggregate materials via MICP technology.

scholarly journals Analysis of blood transfusion request and utilization pattern at teaching hospital in Eastern Nepal

2018 ◽  
Vol 8 (2) ◽  
pp. 1374-1377 ◽  
Author(s):  
Santosh Upadhyaya Kafle ◽  
Krishna Kumar Jha ◽  
Mrinalini Singh ◽  
Shilpi Shaukin
Keyword(s):  
Blood Transfusion ◽  
Blood Group ◽  
Teaching Hospital ◽  
Whole Blood ◽  
Age Group ◽  
Utilization Pattern ◽  
Total Blood ◽  
Cross Sectional ◽  
Male And Female ◽  
Gynecology And Obstetrics

Background: Blood transfusion unit collection, storage and dispatching on Birat Medical College and Teaching Hospital began from 19 June 2016 via blood bank. After which, many blood distribution were made accessible via this service. This study analyzes the blood transfusion request and utilization pattern and also to monitor for managing the bloodstocks meeting present and future demand in hospital. Materials and Methods: This is descriptive cross-sectional study conducted for all the requests of whole blood dispatched from 19th June, 2016 to 04th July, 2018. Whole blood requisitions from various departments were reviewed regarding the number of requisition, total blood unit replaced, blood group and socio-demographic profile of patients.Results: Of 648 transfusion units dispatched, 131 and 324 patients were male and female respectively, B positive blood group were most common, followed by A positive, O positive, AB positive, A negative, O negative and AB negative respectively. The largest numbers of requisitions were from Gynecology and Obstetric department in the hospital of 258 requisitions followed by internal medicine, surgery department, postoperative ward and orthopaedic department. Majority of the requisitions were for 20-29 years age group from the local district Morang. The total blood units replaced were 75, of which 29 and 46 of male and female respectively. Conclusions: B Positive was the predominant requested blood group with Gynecology and Obstetrics department making the most requests, among 20-29 years age group from Morang district. The total replaced blood units were less in number with some requisition forms even lacked essential details.

New Gel Aggregates To Improve Sweep Efficiency During Waterflooding

2011 ◽  
Vol 14 (01) ◽  
pp. 120-128 ◽  
Author(s):  
Guanglun Lei ◽  
Lingling Li ◽  
Hisham A. Nasr-El-Din
Keyword(s):  
Low Cost ◽  
Oil Production ◽  
High Water ◽  
Resistance Factor ◽  
Water Production ◽  
Sweep Efficiency ◽  
Low Viscosity ◽  
Productivity Decline ◽  
High Water Cut ◽  
Water Cut

Summary A common problem for oil production is excessive water production, which can lead to rapid productivity decline and significant increases in operating costs. The result is often a premature shut-in of wells because production has become uneconomical. In water injectors, the injection profiles are uneven and, as a result, large amounts of oil are left behind the water front. Many chemical systems have been used to control water production and improve recovery from reservoirs with high water cut. Inorganic gels have low viscosity and can be pumped using typical field mixing and injection equipment. Polymer or crosslinked gels, especially polyacrylamide-based systems, are mainly used because of their relatively low cost and their supposed selectivity. In this paper, microspheres (5–30 μm) were synthesized using acrylamide monomers crosslinked with an organic crosslinker. They can be suspended in water and can be pumped in sandstone formations. They can plug some of the pore throats and, thus, force injected water to change its direction and increase the sweep efficiency. A high-pressure/high-temperature (HP/HT) rheometer was used to measure G (elastic modulus) and G" (viscous modulus) of these aggregates. Experimental results indicate that these microspheres are stable in solutions with 20,000 ppm NaCl at 175°F. They can expand up to five times their original size in deionized water and show good elasticity. The results of sandpack tests show that the microspheres can flow through cores with permeability greater than 500 md and can increase the resistance factor by eight to 25 times and the residual resistance factor by nine times. The addition of microspheres to polymer solutions increased the resistance factor beyond that obtained with the polymer solution alone. Field data using microspheres showed significant improvements in the injection profile and enhancements in oil production.

scholarly journals HIV and Hepatitis B seroprevalence among the nepalese blood donors

2013 ◽  
Vol 3 (5) ◽  
pp. 390-393 ◽  
Author(s):  
SR Kandel ◽  
P Ghimire ◽  
BR Tiwari ◽  
M Rajkarnikar
Keyword(s):  
Hepatitis B ◽  
Blood Donors ◽  
Hepatitis B Surface Antigen ◽  
Elisa Test ◽  
Age Group ◽  
Male And Female ◽  
Test Kit ◽  
The Difference ◽  
Donated Blood ◽  
Donor Recruitment

Background: HIV and Hepatitis B infections are public health problems in Nepal. This study was conducted based at NRCS/CBTS, with the objective of determining the HIV and HBsAg sero-prevalence in non-remunerated volunteer blood donors. Materials and Methods: A total of 66,904 units of blood collected, following donor recruitment criteriaduring March 2009-Sept. 2010 was included for analysis. All donated blood samples were subjected to screening for Transfusion transmitted infections including HIV and Hepatitis B surface antigen using standard ELISA test kits (Dade Behring, Germany). Initial reactive sera were re-tested for reconfi rmation with same test kits plus another test kit (Detect-HIV, Adaltis Inc, and Qualisa). Results: Out of 66,904 units of blood collected, 56,973 units were from male and 9,931 were from female donors. Among the total screened samples, 73 (0.10%) were found to be positive for HIV, {0.11% (64/56973) in male and 0.09% (9/9931) in female}; the difference between male and female donors (?2<3.841) was statistically signifi cant. The seroprevalence of HIV was highest in age group of 30- 39 both in male and female (p<0.001). Similarly, for HBsAg, overall seroprevalence was found to be 0.47% (316/66904 {0.42% (242/56973) in male and 0.74% (74/9931) in female}. The difference was statistically signifi cant (?2<3.841). The highest HBsAg sero-prevalence(0.65%) was also observed in same age group i.e. 30-39 (p<0.001) in male but highest seroprevalence (2.63%) was observed inage group of ?50 in female. Conclusion: Both HIV and HBV sero-prevalence is high in adult voluntary blood donors. Journal of Pathology of Nepal (2013) Vol. 3, No.1, Issue 5, 390-393 DOI: http://dx.doi.org/10.3126/jpn.v3i5.7864

scholarly journals Visuospatial Reasoning and Its Relation to External Variables

2014 ◽  
Vol 24 (58) ◽  
pp. 197-204
Author(s):  
Juliana Carnevalli Siqueira Nery ◽  
Fabián Javier Marín Rueda
Keyword(s):  
Age Group ◽  
Older Students ◽  
Normative Sample ◽  
Male And Female ◽  
Visuospatial Reasoning ◽  
External Variables ◽  
Belo Horizonte ◽  
Performance Results ◽  
The City ◽  
Age And Sex

In this study, the relation of age and sex with visuospatial reasoning assessed by the Cube Test was investigated. In addition, a comparative study was conducted between this study sample and the normative group of the test with regard to visuospatial reasoning performance results. Six hundred and eighty-four students participated in this study, from the city of Belo Horizonte (State of Minas Gerais, Brazil), aged between 15 and 57 years old, both male and female. The results showed both age and sex differences, where younger students showed a significantly higher performance than older students and men showed significantly higher averages than women in every test comparison. In the study with the normative sample, men showed higher averages than women throughout every age group and in the overall result of both studies. The results obtained reflect those found in the literature and highlight the influence of age and sex on visuospatial reasoning.

scholarly journals Competencies Of Commerce Teacher Trainees

2009 ◽  
Vol 8 (2) ◽  
pp. 40-45
Author(s):  
Simon Philip ◽  
N.O. Nellaiyapen
Keyword(s):  
Sampling Technique ◽  
Age Group ◽  
Teaching Competencies ◽  
Male And Female ◽  
Purposive Sampling ◽  
Teacher Trainees ◽  
Significant Difference

This is an attempt to investigate the teaching competencies of commerce teacher trainees. The main objectives of the study is find out whether there is any significant difference in the teaching competencies of commerce teacher trainees in respect of their gender, age, and medium studied. Sample of 200 B.Ed. trainees were selected by using purposive sampling technique. It is found that teacher trainees have low teaching competencies. It is revealed that there is significant difference in mean teaching competency scores of male and female, English and Malayalam medium teacher trainees. This study also revealed that there is no significant difference in mean teaching competency scores of trainees who are less than 22 years of age and above 22 years of the age group.

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