Analysis Of The Article ' Growing More Food With Less Water ' By Sandra Postel

A potential solution for farmers would be to switch to a subsurface drip irrigation system that could permanently cut farmers' water use by 25 to 50 percent. This would alleviate some of the need for conservation and free up more state water reserves for urban use during time of regional drought (U.S. Water News Online).

Each year, at least 7.8 trillion gallons of water are drawn up from the Ogalla Aquifer to irrigate the crops planted on the High Plains. These cros are the main food sourrce for our entire country. Tragically, irrigation is depleting the aquifer faster than it can replenish itself, and that is the problem. In fact, only the tiniest fraction of the water is ever replaced in the Ogallala Aquifer. If the water were ever fully depleted, the aquifer would need 6,000 years to refill naturally (Zwingle 83). The only way the Ogalla can be replenished is by water seeping down through the layers of soil until it reaches the aquifer. This water comes from the small amount of precipitation in the region, as well as from streams, reservoirs, canals, and irrigation (McGuire and Sharpe).

In the event that erosion has become an extreme issue farmers have begun to watch more it much more closely. Ways to protect the water have been put into use

The sources of food and water problems are vast. Some of the sources are using corn as an alternative to feeding animals such as cows and pigs. As Michael Pollan states in his book, The Omnivore’s Dilemma, corn was being mass produced after world war II after there were weapons of mass destruction with high nitrogen content that were the used as fertilizers. The issues mentioned in The Omnivore’s Dilemma and Blue Future by Maude Barlow share the same amount of issues in water and ability of the government to regulate farming practices and companies that are leading to these issues. Both books mention the major source of water loss as mass production of crops and meat.

Without water, the lives of millions of children, and adults, are at risk. For children under five, water-and-sanitation diseases are one of the leading causes of death [4], along with malnutrition. [5] Unfortunately, studies show that in 2025, two-thirds of the world’s population will be water stressed. [6] If this proves to be correct, then will two-thirds of the world’s population be hungry? We use so much water to produce even the simplest of agriculture. It takes 2,000 to 5,000 liters of water to make food for just one person, not to mention that humans need to drink 2.5 liters of water daily. [7]

As we all understand, the Earth has many landmarks and it is these physical features that create an abundant and organized system within which we thrive. One of the most abundant natural resources on the planet is water and the importance of this element is as crucial as any other. For the fortunate few who get to utilize it, this amazing reserve provides us with our necessity for daily consumption as well as our ability to grow just about anything we please. Common irrigation practices are essential for gathering water into a contained area to grow crops that would not typically survive in areas without heavy rainfall. As a matter of fact, “irrigation is an ancient practice that originated along the Tigris and Euphrates Rivers in what is now Iraq” and is now the result of an estimated 40 percent of all crops grown around the world (Water Encyclopedia). This tactic has provided many different cultures with numerous varieties of crops as well as growth in crop yield which in turn dramatically advances human civilization. As we develop into a more progressive society, the tools and systems used to grow our crops also become more intelligent as well as sustainable

Living on a farm for the first half of my life, I know that my dad and many of our neighbors’ schedules revolved around the rain. Aquaponic and hydroponic methods of farming both provide dramatic reduction in water usage. One system designed by Nate Storey claims to be able to reduce water usage substantially (2014). He says that a similar sized back yard garden will use twenty times the water as hydroponic/aquaponics system. Other systems have seen similar reduction in water usage, because unlike traditional farming with irrigation, aquaponics and hydroponics is a closed system that recirculates water multiple times so that most water loss is through evaporation and the plants using it for osmosis. In traditional farming, water is lost to runoff or evaporates before the crops have a chance to use it. Moreover, aquaponics was originally mentioned as a way to reduce fish imports and allow people of inland populations to have locally raised fish and produce in the Virgin Islands (Rakocy 2000). With the need to provide food, particularly meat, aquaponically raised fish provide an alternative to shipping fish inland from the coasts or international

Farmers need water to grow crops, feed animals, and, of course, to stay alive; but, how much water is too much? When farmers- and other land owners- use too much of their own water and run out, they dig. They don’t dig straight down, they dig

(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

East Africa has many main crops, but for the drier sections of East Africa, the cropping system is bent around millet. In the more humid districts, main crops are maize and cassava. Coffee, tea, tobacco, sugarcane, and cotton are the crops that produce the most money. Because of the lack of irrigation, East Africa’s crops are very vulnerable to unpredictable weather and external shocks. Water availability is one factor that limits as to how many crops it can produce a year. A project is currently going on to accelerate irrigation development in the more humid regions and rain-fed crops, so people who live in those regions can have their water and food.

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

We usually associate water shortages with a lack of drinking water, but global water scarcity has a critical impact on food security. Agriculture consumes more water than any other source. Climate change is altering patterns of weather around the world, causing shortages and droughts in some areas and floods in others. Water is key to food security. Crops and livestock need water to grow. Agriculture requires large quantities of water for irrigation and various production processes. Water scarcity may limit food production and supply, putting pressure on food prices and increasing countries’ dependence on food imports

Water is the main source of life on the Earth. It is vital for normal existence and functioning of organisms. Earth is sometimes called “water planet.” But, in fact, the number of freshwater is limited. “Only about 2 percent of the planet's water is fresh.” (How much water is there on Earth?) This water is not enough even to meet daily needs of mankind. According to World Health Organization, “a lack of water to meet daily needs is a reality today for one in three people around the world.” (2009) In the Middle East the situation is especially hard. This region is thought to be one of the droughtiest places in the world, most of it’s territory is deserted. Freshwater accounts to 1 percent of the world’s supplies, while the population comes

Agriculture in the United States has changed dramatically over the centuries. Since the 1960’s large commercial farms have been leading in sales. As a direct result of their success we, as a society, have access to affordable food. However, the success of large farms has lead to many negative impacts such as increased usage of resources and decreased diversity in crop fields. This begs the question, what can be done to reduce the negative impacts of large farms. One solution growing in popularity is sustainable agriculture. The idea of sustainable agriculture is to create farms that need little to no outside help from irrigation, pesticides, or fertilizers. Sustainability can be achieved in many way through

Irrigation played a crucial role in increasing Arkansas rice production. Rice farming in Arkansas uses the Mississippi River Valley alluvial aquifer, often referred to as the “alluvial aquifer” for irrigation. Arkansas farmers irrigated 0.949 Bgal/d in 1965 of groundwater for irrigation to 7.679 Bgal/d in 2010, an 800% increase in groundwater usage over the past 50 years. This increase in water usage will only increase as farmers convert more acreage to produce rice. The total water use for irrigation (groundwater and surface water) in Arkansas between 1965 and 2010 increased from 1160 Mgal/d to 9247 Mgal/d, a 800% increase. See table 2 for more detail on water usage. Graphs use data from the Arkansas water use reports. (“Water