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Geography Many countries have salinized areas since ancient times, who were abandoned by becoming unfit for agriculture. Before this happened by complete ignorance of the process, but today, with the technological and scientific advances, it happens, in most cases, for negligence. The greed for easy money and fast talks. The soil in the irrigated Custody - PE had their agricultural activity interrupted by salinization. In the semi-arid region in the valley of San Francisco, irrigation is widely used, and most often, misused, because instead of irrigating the right amount, it soaks into the soil. As John Suassuna, researcher at Fundação Joaquim Nabucco, "does not mean watering only, bring water to crops through pipes or channels previously calculated. Means also adjust the amounts applied to the water requirements of plants, taking into account the soil characteristics, and climate locations as well as the quality of the water used for irrigation. Table 3 The Aral Sea or cotton Marie-Hélène Mandrillon From the 1970s, the Aral Sea, a salt lake situated in the heart of Central Asia, on the border between Kazakhstan and Uzbekistan saw its surface drastically reduced. The river flows He loved Daria and Syr-Daria, which fed not only halved, but even totally disappeared in the early '80s. However it was necessary to wait until 1988 and the policy of glasnost by Mikhail Gorbachev to the Moscow press that the alarm: the Aral has lost half of its surface and its level dropped 15 meters. The losses were enormous: in some places, the sea receded, really, more than 100 km, which made the fishing ports of Aralsk and moui-nak pass you find yourself inside, salt, spread by wind , affected large tracts of land and, in addition, many fish species have become extinct forever. The agony of the Aral Sea is the revelation of the spectacular failure of a policy of large-scale irrigation, which allowed 7 million hectares were entirely devoted to monoculture cotton. Besides which, together with the waters of the sea were lost 60 000 jobs and the memory of a landscape fell apart forever. With the use of hydraulic He loved Daria and Syr-Daria, from the sixties, their deltas dried, while the population living near the sea, and barely begun the process of demographic transition started have the industrial culture of cotton, the "white gold" as the only source of income. Source: MANDRILLON, Marie-Helene. State of the Environment in the World. Salinity is also a form of desertification, as it makes the soil unsuitable for cultivation, forcing the local population to migrate to other areas.
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Geografija Mnoge zemlje su zaslanjenih područja od davnina, koji su napušteni od strane postaju nesposobni za poljoprivredu. Prije nego što se to dogodilo po potpunom neznanju o procesu, ali danas, s tehnološkim i znanstvenim napretkom, događa se, u većini slučajeva, za nemar. Pohlepa za novcem lako i brzo govori. Tlo u navodnjava pritvor - PE imala svoju poljoprivrednu djelatnost prekinuta zaslanjivanja. U polu-sušno regije u dolini San Franciscu, navodnjavanje je naširoko koristi, i najčešće, zloupotrijebiti, jer umjesto navodnjavanje pravo iznos, to upija u tlo. Kao što je John Suassuna, istraživač na Fundação Joaquim Nabucco, "ne znači samo da zalijevanje, dovesti vodu na usjevima kroz cijevi ili kanala prethodno dobivenih. Također znači prilagoditi iznose primijeniti na vodovodnu zahtjevima postrojenja, uzimajući u obzir značajke tla i klimatske mjesta, kao i na kvalitetu vode za navodnjavanje. Tablica 3 Aralsko more ili pamuka Marie-Hélène Mandrillon Od 1970-ih, Aralsko more, slano jezero smješteno u srcu srednje Azije, na granici između Kazahstana i Uzbekistana vidjela njegova površina drastično smanjen. Rijeka teče Volio DARIA i sir-Daria, koji hranio ne samo prepolovljena, ali čak potpuno nestala je u ranim 80-ima. Međutim, bilo je potrebno čekati do 1988 i politika glasnosti strane Mihaila Gorbačova u Moskvi novinarima da je alarm: Aral je izgubio polovicu njegove površine, a njegova razina pala 15 metara. Gubici su ogromni: u nekim mjestima, more povuklo, stvarno, više od 100 km, što je u ribarske luke u Aralsk i moui-NAK pass se nađete u, soli, proširila po vjetru , pogođene velike površine zemljišta i, osim toga, mnoge vrste riba su izumrle zauvijek. Agonija Aralskog mora je objava o spektakularnom neuspjeha politike navodnjavanje velikih razmjera, što je omogućilo 7 milijuna hektara u potpunosti su posvećeni monokulturi pamuka. Osim što, zajedno s morem su izgubili 60 000 radnih mjesta, a sjećanje na krajolik raspao zauvijek. Uz korištenje hidraulične Volio DARIA i sir-Daria, iz šezdesetih godina, njihove delte suši, dok je broj stanovnika koji žive u blizini mora, i jedva počeo proces demografske tranzicije započeli imaju industrijske kulture pamuka, "bijelo zlato" kao jedini izvor prihoda. Izvor: MANDRILLON, Marie-Helene. O stanju okoliša u svijetu. 1993. Slanost je također oblik pustinja, kao što čini zemljište neprikladan za uzgoj, prisiljavajući lokalno stanovništvo migrirati na drugim područjima.