How Effective Are Drip Irrigation Systems

How Effective Are Drip Irrigation Systems The article evaluates the efficiency, effectiveness, social, economic and environmental impacts of the drip irrigation system. The drip irrigation system has the potential to increase the agricultural productivity and also to reduce water usage required for irrigation. It is a system of pipes and tubing located under the soil. Water is passed through these pipes which end at near the roots of the plants. This makes the water loss minimal. Initial stage is designing the system and its installation follows it. The article states the advantages and disadvantages of the system and also cites evidence with regard to the social, economic and environmental aspects. Poverty is one of the primary concerns the world faces in its road to development. Eradication of poverty tends to be the prime aims of governments worldwide. Lack of proper nutrition is a major cause contributing to poverty. Improving agricultural standards can help in producing more food and thus counter the lack of food factor. One way to improve agricultural standards is to develop the irrigation methods used. Irrigation is closely related to poverty. Irrigation benefits the poor through higher production, higher yields, low risk of crop failure and higher and year round farm and non-farm employment. Irrigation leads to high value market oriented agricultural production [1]. However, in developing countries like India, the agricultural sector is heavily dependent on the south-west monsoons. In view of the rising temperatures worldwide due to global warming and changes of weather patterns associated with it, dependence on rains is not always a possible solution. Failure of proper rains can cripple the agricultural sector which can lead to an overall rise in poverty. Thus efficient methods of irrigation need to be developed. The drip irrigation system is one such method of irrigation that is being utilised. Drip irrigation is water saving, efficient and effective watering system .The article focuses on the different aspects of the drip irrigation system, its contribution in poverty alleviation and the social economic and environmental impacts of this technology. Subsurface drip irrigation or SDI is another way of terming a drip irrigation system. As stated by C. Shock, drip irrigation is the slow even application of low-pressure water to soil and plants using plastic tubing placed near the plantsà ¢Ã¢â€š ¬Ã¢â€ž ¢ root zone [8]. Water is supplied to the soil at very low rates from the system of the plastic tubing pipes which are fitted with emitters at the ends. Therefore loss of water through evaporation, water run-off and percolation is minimized to a great extent. Also water contact with the stems, leaves and fruits of the plant is reduced which helps in prevention of formation of disease on the plant. Since the tubing is buried under the soil, it is less at risk of damage due to weeding and cultivation activities. Designing a subsurface drip system requires an experienced qualified designer. As G. Harris has stated, proper hydraulic design is the initial step in installing a successful SDI system [5]. This will ensure that the system effectively deals with the constraints imposed by the crop and soil characteristics, field size, topography, water supply and shape. The system must be capable of meeting the crop water need during the peak water demand times. A block or zone, which is the portion of the field that can be watered at the same time, is determined by the characteristics of the drip tubing selected. The optimal tube spacing is determined by the soil characteristics and the depth of tube placement. If the installations are too deep it will restrict the availability of surface applied nutrients limits the effectiveness of the system for crop germination. Adequate flushing velocities must be allowed for in the design to remove sediments from the emitters. This helps to prevent the SDI sy stem from getting clogged and increases the systemà ¢Ã¢â€š ¬Ã¢â€ž ¢s life. Following the designing comes the installation part of the SDI system. Proper installation ensures that the system performs optimally and it also determines the life of the system. Installation is done in sites which have not been cropped recently as insect activity or weedy areas could destroy the pipes within days of installation [6].Initially location of the tubing is marked out. A subsoiler can be used or if more accurate positioning is needed, GPS can also be used. Specialized injectors are available for installation of the SDI pipes. The power and water source limitations are to be considered during the installation of the system. Filters are also used which helps in removing particles and keeps the emitters from getting clogged. The major feature of this system that makes it highly desirable is that the water use efficiency will be better compared to other systems or methods of irrigation. Evidence put forward by C.R. Camp show that drip irrigation systems implemented in Virginia require 30% less water compared to sprinkler irrigation for cultivating corn [3]. For cotton, the water usage was reduced significantly by 40%. Implementation of the system in Hawaii helped the farmers to get a greater yield than when using sprinkler irrigation system [4]. Additional advantages include: Drip irrigation systems are suited to farms having uneven topography or soil texture. Precise application of nutrients is possible. Timely application of herbicides, insecticides and fungicides is possible. The drip irrigation system can be automated. Irrigation can be carried out day and night regardless of the wind, daylight availability or other cultivation activities [7]. The SDI system can be used for fertilizing. Nutrients can be supplied in a sustained way, and regulated in rate and composition, according to the crop requirements [7]. The hydraulics help in easy water control the number of points provides excellent uniformity of supply. There are a number of disadvantages for the drip irrigation system. Initial investment is quite high for this system. Root development is limited and hence resulting in root rot and dust problems [7]. The emitters can get clogged frequently and cleaning it is a costly and time consuming process. Accumulation of salts might occur at the interface between the wet and dry zones of the soil. It is generally accepted that irrigation can transform society as well as land and landscapes. Drip irrigation has brought about a number of positive and negative social impacts. It helps in alleviating poverty in irrigated areas, minimizes the differential distribution of benefits across farmers and increases the social benefits [7]. The positive effect it has brought on the demographics of the Waitaki valley has helped arrest the population decline [9]. The additional population would not only strengthen the social structure and networks but also increase economic growth. Thus services such as health and education would become more viable. On the other hand, automated drip irrigation systems tend to require less labour and in low wage economies, where job opportunities lag behind growth in labour force owing to rise in population, reducing hired labour can be socially problematic [10]. This leads to further unemployment. Considering the economic aspects, drip irrigation systems have helped farmers to attain better profits due to higher yield. Farmers can conserve water more and also increase the productivity of their farms. The yield of cotton increased by 21% in Dalby and Moree while in Lucerne, yield improvement was between 13-34% [5]. The profits obtained in tomato cultivation in California were about 867 to 1493 dollars more [12]. Water usage was reduced by 45% for corn cultivation in the Great Plains in USA [13]. In spite of all these a major hindrance in the implementation of the system is the high initial cost. Designing and installation requires qualified people and moreover the cost and time for maintenance of the system is also on the higher side. However in the long run farmers can make up for the high initial costs with the higher amount of yield they obtain. The drip irrigation helps in improving the soil surface and the environment. It allows pre treated coalbed methane waters to flow into the root zone of an agricultural field which minimized environmental impacts by storing detrimental salts in the vadose zone [11]. It reduces off-farm movements of fertilizers and pollutants and improves the water use efficiency of irrigated agriculture [3]. It offers potential for increased water and nitrate fertilizer efficiency and decreases ground water contamination by NO3 [14]. The certain negative traits that the system has on the environment are that root rot may occur and levels of salinity rises. Root development is affected leading to insufficient protection against lack of water and poor root anchorage [7]. Overall, the drip irrigation system is an effective way of irrigation. It saves on water usage and allows farmers to increase their farm output. The increased outputs helps counter the rise in food demand and helps the poorer sections of the society with more food at cheaper prices. Evidence presented in the article show the increased crop yield. Even thought the technology comes at a higher price, the effects of implementing it will be long lasting and positive.

Can Siebel Stop Its Slide Essay -- Recession, Case Study, solution

In the fall of 2001, business software pioneer Thomas M. Siebel was giddy as he looked ahead. Sure, the recession was hurting. But he claimed his company, Siebel Systems Inc. -- the leader in software for managing sales forces and customer-service departments -- would be more resilient than its competitors. ``Everybody is going to be naked,'' Siebel said with relish. ``We're going to find out who are the dilettantes. We're going to find out who are the scumbags, and who are the sleazeballs. Everybody is going to be exposed for who they are. It's going to be a remarkable time.'' Two months later, he confidently predicted that the high-tech downturn was about to end. He could be certain, he said, because of the forecasting capabilities in his own software. Well, both Tom Siebel and his software get failing grades for prognostication. The tech industry is still mired in slow growth, and Siebel Systems, software's highest flier in the go-go '90s, has tumbled farther than its ``dilettante '' rivals. Revenues last year tumbled 22%, to $1.6 billion, compared with a drop of only 2% for the overall corporate-applications-software industry. In the first quarter, Siebel's revenues dropped 30%, to $333 million. Siebel's stock price, at $8.50, is off a staggering 94% from its peak in 2000 of $119. It wasn't just the economy that hobbled Siebel Systems. A 2001 product upgrade was so difficult to install that customers were reluctant to buy it. The company's reputation suffered from bad publicity about its customer-satisfaction record. And it lost ground to corporate-applications leader SAP. In 2002, Siebel Systems' share of the customer-management market it helped pioneer slipped from 29% to 23%, according to Gartner Dataquest. No. 2 SAP gained ... ...ness-software maker Siebel Systems has seen revenues slide 44% over the past two years. Here's a look at why, and at its prospects going forward. COMPLEXITY INCOMPATIBILITY PROBLEM Customers complain Its applications don't work Siebel's software is easily with rival software complex and hard to that handles financials and install. Major projects human resources. can take a year to com- plete. FIX A team of 60 consultants New integration technologies helps customers plan improve things, but rivals that projects, but something make full suites of products must still be done to have an advantage. simplify the products. TARNISHED REPUTATION PROBLEM It has been accused of overstating customer satisfaction and was slammed by the SEC for a financial disclosure violation. FIX It hasn't adequately addressed customer satisfaction issues and is stingy with financial information.

Fine Art Critique Paper

Germaine Armstrong Professor Hale MU2313 Critique Paper When I went home last weekend I attempted to go to the Arlington Museum of Art. Unfortunately the museum was closed due to the fact that they where changing exhibits and would not reopen until the following week. I returned back to San Marcos and decided I would go to The Wittliff Collections here on campus. To my surprise it was a lot bigger than I thought it would be. Being on just one floor of a building I thought it would be a pretty limited museum but it is way bigger than expected. There are four exhibits on display in the museum.One is a permanent display in the museum. There are also a couple of smaller displays in an area in the museum. I couldn’t take any pictures in the museum due to the many signs up saying not to. The exhibit that is on permanent display is The Lonesome Dove Collection. Arguably the greatest western made is based on the Larry McMurtry’s Pulitzer Prize-winning novel. On display there ar e many things from scripts from the TV show to trail maps used to show the geography of the land on the show. The collection is pretty amazing to me and I am not really a fan of lonesome dove.There are so many small details of the show that you get to see. It really catches your attention. You get to see so many of the props from guns to the saddles they used on horses. Though this is the only permanent exhibit the other exhibits are equally as great. Another Exhibit on display is called Face to Face Portraits. This exhibit shows the work of over 30 photographers. From photos that included Willie Nelson and Texas State alumni George Strait to homeless men, women, and children from across the world. Two pieces from this exhibit really caught my attention.One of the pictures I found very interesting being that of an older gentlemen sitting in a chair that I thought to be pretty unique. The chair he is sitting in caught my eye as soon as I looked at the photo. The arms of the chair hav e been carved to look like the head of a cougar, with the legs the chair being cougar legs. The wood of the chair has many different shades of color. The man sitting in the chair is actually dressed cleanly but you can clearly see that he is a man of lower class. He has on old sneakers and looks like he is out in the sun for a good majority of his time.This one photograph made me ask myself many questions such as â€Å"is he wealthy or poor? † and â€Å"is that his chair or just used for the picture? † or maybe â€Å"did he make the chair and wants to sell it? † The photo really made me think more than any other in exhibit. The other photo or photos in the exhibit that caught my eye were those of Willie Nelson. He had several photos as well as other notable things such as one of his songbooks on display. Nelson had his very on little display case of many notable pictures and accomplishments of his. The reason I really like this is because I am a fan of Willieâ⠂¬â„¢s music.Not only am I a fan but also Willie actually owned a gas station and a house not even ten miles away from where I grew up. So I have gone and seen many notable things that have happened in his career as he put many things on display in his gas station. The most unique thing in the display was a songbook that Willie Nelson wrote when he was ten years old. Seeing more of his accomplishments was awesome. A third exhibit was Global Odyssey: From Texas to the world and back. It showcased many stories of Texas writers as they traveled the world. There are stories form men who severed in Vietnam.This was my least favorite exhibit of any not to say it was a bad one but it just did not catch my attention like the other exhibits. The final exhibit was Las Sombras The Shadows. This exhibit I thought was the coolest of them all. The Photograms by Kate Breakey are amazing. This was my most favorite because I am an animal lover. Many of the photos captured wild animals in their natur al environment. There are several rooms with pictures from this exhibit. One room had most of my attention. The room was all pictures taken from a video that was filmed by a camera left in the woods.Other photos where actually like the outline of many animals. The most intriguing photo to me was a picture of a wolf. The Wolf is actually walking right toward the camera and looking directly in to the lens with its head tilted a little to one side. I like this photo because it shows the wolf checking out its surroundings and actually examining something odd. It looks as if the wolf knows that the camera is not suppose to be there. In all the other photos the animals are either running or walking right by the camera. I am actually glad I went to the museum on campus and it’s the museum I choose to write about.If I did not have to do this critique and the museum in Arlington was not closed I probably would have never visited the museum on campus. Having went I really enjoyed mysel f. I thought it was worth every minute of my time and I could see myself visiting it many more times before I am don at Texas State. I went to the Bass Performance Hall in Fort Worth Texas to watch the Fort Worth Symphony Orchestra. I was sitting pretty high up but still had a great seat and could hear perfectly. Before going to watch the performance I read a couple of reviews online.Most of the reviews praised the orchestra for there performance in concerts earlier this year. The concert I attended would include pieces from three composers John B Hedges, Schumann, and Rimsky-Korsakov. I arrived to the concert pretty early and after I walked around for a little bit I found my seat, which turned out to be way better than, I expected when I first got there. When I first got to my seat I could see the stage fine but thought I might not be able to hear very well being so high up. Boy was I wrong when the members of the orchestra began to warm up I could hear everything crystal clear.Hav ing never being at one of these big concerts before I found it weird how everyone warmed up separately. With them warming up like that it sounded like a bunch of senseless noise. As it got closer to show time the senseless noise became certain people warming up together to whole sections warming up together and was pretty cool. The concert started out with a piece by John B Hedges called Slapdance. This piece of music was filled with a lot of life and energy. One of the reasons I really enjoyed this piece was because of the many percussion instruments used.I was in my high school band and my favorite pieces would always be the fast paced exciting music filled with percussion. This piece had me on the edge of my seat and really excited for the rest of the concert. The piece following Slapdance was a piece by Schumann by the name of Cello Concerto in A Minor, Op. 129. This piece though not as exciting as the first piece was pretty good. It started out slow but it picked up as the song continued. This piece had a solo for a cello. The solo was played by a guest cellist Alban Gerhardt which I learned later is considered one of the great cellist of our time.Though this was my least favorite piece it was not because I did not like it but because I really liked the other two more. After the first two pieces there was an intermission. Most people got up and left the performance room but I stayed just to observe and see what the orchestra would be doing. To my surprise many of them got up and went backstage but a few of them stayed on the stage and seemed to practice he up coming piece. Seeing professional musicians stay on stage and continue to practice up to right before they played was pretty cool to see. After the 15 minute intermission every on returned to their seats.The entire orchestra came back to the stage for the final piece Scheherazade, Op. 35 written by Nikolay Rimsky-Korsakov. Being the final piece it was the longest of the three selections. I really enj oyed this piece because it had many parts some parts where very slow but it had plenty of exciting parts. This piece actually tells many Indian-Arabian tales called A Thousand and One Nights. This piece even though written hundreds of years later is as well known as the stories. The performance hall where the concert was held was an amazing place to see. When I first arrived and saw the building I thought â€Å"this is the building. Not knowing that I actually wasn’t at the front of the building but the side. Once I got inside everything was extremely incredible. The building didn’t look nearly as large from the outside. When I walked into where the performance would be held I was in awe. The stage was set down at the bottom from where I was with four different levels of seats. Having never been to a place like it I thought it would be awesome to play music in a place like that. The Bass Performance is an amazing place. By attending this classical music concert I lear ned that I could actually enjoy this type of music.The cost for the concert was actually pretty cheap and the seat I had I think was pretty good. I feel like the concert was worth my money and my time. My high school football coach use to always tell me that going outside your comfort zone makes you broaden your mind on what you think is good and bad. Before going to the concert I would have never thought that I would enjoy the music as much as I did. Even though I enjoyed it I probably will not go to another one just to go. After going and my brother and I being the only two younger people there it felt a little uncomfortable.It is something I could see myself going to when I get older. For right now though I would rather go to something with more excitement and people my age. Picking a movie to critique for this paper was a lot harder than I thought it would be. I could not decide if I wanted to pick a movie I had never seen or one I have seen many times. Did I want to pick a movi e that I liked or one that I hated? I decide that I would pick a movie I did not like to see if me critiquing the movie would change how I viewed it or would my opinion stay the same.The movie I choose to critique was the movie Clueless written and directed by Amy Heckerling. The movie is based on a very popular girl in high school who along with her best friend helps the new nerdy kid that arrives at their school to fit in. By changing how the new kid dresses, talks, and trying to get her a boyfriend. Cher Horowitz the main character of the movie is at the top of her schools social scene. Her father is a rich lawyer so she has everything she has ever wanted. Going to high school in Beverly Hills she is obsessed with her fashion.She likes to think she is just as normal as a regular girl but has a closet that puts her outfits together. She is the typical example of â€Å"daddy’s little girl†. Even when given rules to follow she somehow always manages to find a loophole and does what she wants. She is your typical â€Å"brat†. The one thing she cannot seem to get is a boy. The movie is told from Cher’s point of view as she tries to help friends and ultimately help herself before the movie ends. Cher’s best friend is Dionne. Dionne understands Cher because she faces all the same popular girl problems.Dionne helps Cher with her fashion and trying to give the new kid a makeover. At first Cher is against Dionne and her boyfriend’s relationship but after a near accident Cher realizes that the two are in love and ends up envying their relationship. Tai Frasier is the ugly unpopular nerd that transfers to Cher and Dionne’s school. As soon as she arrives Cher makes it a point of hers to transfer the goofy nerd into one of the popular girls. Dionne is uneasy with the idea at first but Cher uses her charming ways to convince her to do it. Tai immediately falls behind Cher and Dionne and listens to everything the two says.Sh e is attracted to an unpopular boy but ignores him because Cher and Dionne says she should be dating one of the most popular boys at school. Mel Horowitz is the father of Cher. He is a very successful litigator who pays more attention to his work than to his daughter. He tries to discipline Cher throughout the movie but she manages to always find a way to get off easy. Josh Lucas is Cher’s ex-stepbrother. Her father used to be married to Josh’s mother. Josh has ambitions to be a lawyer and tries to learn many things from Mel. Josh and Cher flirt throughout the movie but when she sees josh and Tai flirting she becomes jealous.However Josh and Cher ends up falling for each other at the very end of the movie. When Cher realizes she cannot connect with any other boy because she loves him. Christian Stovitz is one of Cher’s main love interests in the movie until she finds out that he is gay. Christian arrives at midway trough the school year and immediately gets Cher ’s attention. She goes out with him several times and even tries to seduce him. When it does not work she thinks it as something to with herself. After complaining about it to Dionne and her boyfriend Cher is told he is gay and she now understands him more.Throughout the film Cher refers to herself as clueless many times. Even though she had many answers for others problems she often found herself clueless to her own. She helps many of her friends with fashion and boys. She is not able to get any boy she wants. She becomes aware of this and becomes depressed. Shopping helps her depression for a little while but she still finds herself down. She finally overcomes her depression when admits to herself that she loves Josh. After reading reviews on this movie it was actually a pretty big hit in 1995. The movie was much more popular than most expected.It is still a very popular movie because many girls can relate to the things that happen in it. This movie is not based on a true s tory but the events that happen I am sure are possible. Even though I went to a small high school I have seen many girls freak out over many silly things. All of the things Cher goes through sounds like typical girl problems. After seeing this movie several times and now critiquing it I still think that it is overly hyped and I do not think it is a movie I would watch just to watch. There would have to be a reason I would watch it. I think my opinion is like this because I cannot relate to the movie.

Candide an Analysis of Voltaires Perspective on...

Candide Essay Assignment TA: Và ©ronique Church-Duplessis Tutorial: 7-8 SS 2104 Sajid Borhan 998931036 Voltaire in his novella Candide portrays the adventures of a young man named Candide as he faces numerous difficulties after he is forced to leave his sheltered life of the court. Voltaire, in his satire, explores many themes. Voltaire being a critic of the Church does not show the religious institutions and the people associated with it in good light, as demonstrated by the various characters in Candide. There are few portrayals of religious characters in a positive tone. This essay will discuss and analyze Voltaire’s view on religion and how he expresses his discontent and negative impression. This essay will discuss the†¦show more content†¦Another case of the hypocrisy of religious officials would be the friar who being in the Franciscan order contradicts the order’s value of living in poverty by stealing Cunegonde’s valuables, I strong suspect it was that reverend Franciscan who slept in the same inn as us last night in Badajoz; God prevent me from making rash judgments, but he passed through our room twice, and he set off long before us. The corruption and hypocrisy of the religious officials continues by the introduction of the Jesuits in South America. The Jesuits are negatively portrayed in Candide. After Candide goes to South America he encounters Cunegonde’s brother who now resides there as a Jesuit priest. The author in this part of the novella addresses of how the Christian missionaries in the New World are not really ‘civilizing’ the natives. The purpose of the Christian missionaries of the Americas during that time was to ‘civilize’ the local population, as depicted, the natives are in fact against the Jesuits and thus implying that the Jesuits did not actually help the natives there but rather introduced more problems. Voltaire writes about the natives’ anti Jesuit sentiment when the native Oreillons captured Candide and were preparing to eat him mistaking Candide as a J esuit. The writer shows the hypocritical ways of the Jesuit priest by revealing that he hadShow MoreRelatedAge of Enlightenment and Course Materials Essay1475 Words   |  6 PagesCandide worksheet Name: Huy Dang Khac The purpose of this assignment is to help you develop the critical thinking skills necessary to write a basic, college-level analytical essay. You may type directly into this file and then upload when finished. Remember that you need to connect what you read in the book to what you are learning from other course materials to complete you answers. Step I: Basic, factual analysis of a reading 1. List three examples of events/methods from Voltaire’sRead MoreKants Theory of Enlightenment5012 Words   |  21 Pagescentury was decisively shaped by the systematic efforts of the Enlightenment, a philosophical, cultural, and political movement that tried to institute the rule of Reason in all areas of life. Reason was to replace blind faith and superstition in religion, autocratic and arbitrary rule in administration and government, brute force and devious cunning in politics, the dead weight of tradition in social institutions and culture, and primitive instincts or uncontrolled feelings in personal relations