Liquid Crystal Display Advantages And Disadvantages

Water is one of the most precious resources, which support the life of almost everything in the world. Indeed, the world is covered by 75% water, but most of this water is not suitable for human consumption or use. On the same note, the world has been increasing its consumption of water due to the increasing population, leading to increased demands. The increased water consumption, which has been a result of high population, is worrying because the matter may lead to massive water shortages in the future.

This essay is a review of the article “Growing More Food with Less Water”, written by Sandra Postel. According the article, our global freshwater sources, including underground aquifers and rivers are stressed beyond their ability to provide freshwater. Agriculture redesign is necessary with the two primary goals being to cut water demands of mainstream agriculture and bring low cost irrigation to poor farmers. Typical irrigation, crop furrow flooding is a main cause of wasted and polluted water. This article discusses alternatives to typical irrigation. These alternatives have been tested onsite by farers and surveyed.

(Hasan and Özay 2002, 73-74). As Albiac (2008) reports, development of pipe network distribution and drip irrigation methods in other countries led the farmers to have remarkable irrigation efficiency in drought (143). Such technologies have already been used in China, but they are not widely spread in China’s agriculture. One investigation in China on rice paddy irrigation systems development was performed and it revealed that using the fry-foot paddy irrigation (when no water flooded the field) instead of flooding irrigation (when the rice field is completely flooded) significantly (40-60%) reduces water consumption (Xiaoping, Qiangsheng and Bin 2004, 351). Furthermore, drip irrigation method was applied in arid Northern China and it raised the water usage efficiency (Du et al 2007). However, introduction of new irrigation technologies faced some difficulties in China. As Hodstedt (2010) noticed in his article, the water saved by these technologies such as drip irrigation systems was simply spent on more food production and, therefore, did not reduce the water shortage. Also, as he reported, this caused two other environmental problems. Firstly, the water, which was the supply for underground water and aquifers as it was lost by deep percolation and leakage, became unavailable after the water-saving technologies were introduced and this strengthened the aquifers depleting along with its overpumping. Secondly, after

The society cannot afford to ignore the fact that water resources are limited. According to IFPRI (International Food Policy Research Institute), by 2050, there will be 4.8 billion people who will be struggling with limited water resources. This is over half of the world’s population. As the world’s population grows, there will be a greater need for economic development and more food. Factories producing grain use water more than any other input. In fact, water accounts for almost half of all inputs in the manufacturing industry across the globe. By

In recent years overconsumption of water has drained the earth’s river basins faster than rain can replenish them. An average person’s daily water footprint i.e. the total amount of water consumed to support their lifestyle is 3,800 liters. Most of this consumption relates to the crops that are farmed to provide us with food and clothing. Irrigation consumes an enormous amount of water, and the effects of this are seen at every stage in the food chain. For example 98 percent of the water footprint created by raising beef cattle comes from growing the grain that feeds the cows during their lifetimes. For each kilogram of steak produced, we consume 15,415 liters of water. That’s enough drinking water to last one person nearly 17 years. Growing water footprint is partly a result of our increasing population; but it is also compounded by the fact that irrigation systems, especially in the developing world, are often extremely inefficient. The UN Food and Agriculture Organization states that even a good irrigation scheme is only 50-60 percent efficient. Poor irrigation systems can result in the vast majority of the water being lost to evaporation, seepage and other problems before it reaches the fields. Moreover, once it gets there, if farmers choose to irrigate at the wrong time for example, just before it rains, the water will be wasted and the crops may even be damaged.

Take shorter showers, turn off the water when we brush our teeth and just be more conscious of water usage in order to not be wasteful. When it comes to future farmers, they can pay close attention to water per acre feet regulations and follow them closely. Another way to extend water when it comes to agriculture is to use less water intensive crops. Examples are grain sorghum, cotton and sunflowers. Repairing leaks in irrigation and utilizing new and improved ways to irritate are other possible solutions. One new way to irrigate is the PMDI (Precision Mobile Drip irrigation technology system called (Dragon-Line). This new system is predicting a potential for 20-50% water savings compared to conventional irrigation. I believe that for my generation to help with water conservation, we need to be diligent about educating everyone in the past, present and future about the importance of not taking this precious natural resource for

As the population of our world is climbing, the rise in our world’s malnourished is also increasing at an alarming rate due to poor governance and poverty that is clashing with our advances in agriculture which must be controlled in order to keep a good pace with the malnourished population. It is estimated that at a steady birthing rate the world’s population will rise to be around 8.3 billion people and that an additional one billion tons of grain will be necessary, according to Norman Borlaug in an American Institute of Biological Sciences interview in 2002. Furthermore, it is absolutely essential that new sciences and technologies along with government cooperation are constructed and put into effect to boost agricultural production. Research into small-scale technologies, like water

Water is becoming a limited natural resource in the world. In an article published on National Geographic website about “Fresh Water Crisis” [1] it has mentioned that out of the 70% of water which is covering the earth, only 2.5% is suitable for drinking and just 1% of fresh water is easily accessible. In the same article the author talks about how people are wasting this limited resource. The growing scarcity of water is due to the rapid growth of population, rising demand for food and cash crops, increasing urbanization and rising standard of living. On the other hand people are writing articles and papers about how to solve this scarcity issue and all the resources presented about

A team of scientists and researchers of Centre for Science and Environment, New Delhi has made detailed study of the problem, its dimensions and solutions. They have emphasised the need of traditional wisdom of water harvesting. They have given many details and data and proved how useful it can be to make use of our time- tested, age-old and traditional water harvesting system. These traditional methods of water harvesting have been in constant practice from time immemorial in the country, among various communities and villages. They evolved highly decentralised system of water harvesting suited to local conditions. We need to return to the same wisdom and revive the old water harvesting system and structure.

Among all sectors in Egypt, agriculture consumes the largest budget of available water supplies, with its share exceeding 80% of the total gross demand for water. In case the actual consumption of water is considered (water supply minus the water that is returned to the system), the share of agricultural demands is even higher at more than 95%. The area of cultivated land raised from 5.8 Million fed. in 1980 to about 8.0 Million fed. in 1997. Therefore, the consumptive use of water in agriculture has been steadily increased from an estimated 29.4 BCM/yr. to 38.5 BCM/yr. during the same period (1980-1997). This increase has been made possible by an increase in agricultural drainage water reuse, the abstraction of groundwater and a decrease in the fresh water outflow to the sea. In 1997, the total amount of diverted water for irrigation was 57.8 BCM/yr, (MWRI 2005). In 2010, the total agricultural withdrawal was accounted at 67.0 BCM (about 86% of available water supply), (AusAID 2011). Any water becoming additionally available will primarily be used to irrigate new development areas and not to increase the supply to existing lands. Based on water inflow of 55.5 BCM/year, it is expected that by the year 2017 agricultural lands will cover about 11 million fed., and 63.6 BCM of water will be allocated for agriculture. The total agricultural water consumption in 2017 is estimated at 38.7

Irrigate. There are several irrigation techniques to regulate the consumption of water in the plants, lawn, and trees. This also includes maintaining the irrigation system and make sure the equipment works properly.

Liquid crystal displays (LCDs) is the technology used for displays in notebook and other smaller computers. LCDs are used to display arbitrary images or fixed images with low information content, which can be displayed or hidden. Twisted-nematic liquid-crystal display (TN-LCD) is a common type of LCD which consists of a substance called nematic liquid crystal that is confined between two plates of polarized glass. That process uses very little power consumption and low operating

Efficient and effective water management is necessary. Government and the authorities should be responsible for protecting freshwater sources. In addition to that, new laws and regulations about preserving water should be ratified by legislators and helpful methods for sustainable water use should be promoted. Moreover, it is important for countries to expand co-operation with some international organizations in order to take advantage of opportunities to improve water management systems.

Reduction of water availability for agricultural sector, given its high demands and low reservoir levels, which causes economic losses;

(“Water security”, 2010) Moreover, the amount of water needs for food production is the problem. People desire more and more water for even more agriculture. Yet the most major contributor to water scarcity and to the ecosystem is the way people use water (Molden, De Fraiture, & Rijisberman, 2007). In addition, the quantity, availability, and price of key food product inputs can be directly impacted upon by water scarcity having a negative affect on animal and crop yields. The price of food commodities is particularly vulnerable and defenseless to the shocks of unexpected extreme weather incidents, while animals yields are highly at risk from raised water temperatures especially aquaculture and access to clean water sources (Krechowicz, Venugopal, Sauer, Somani, & Pandey, 2010). Within the next ten to twenty years, the water crisis seems likely to trigger significant shortfalls in cereal production. As a result, an enormous global food crisis will occur (Quarterly, 2010).