Managing salinity lessons from the past
Managing salinity lessons from the past
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DOI：
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发表时间：
1985-07
影响因子：
3.9
通讯作者：
D. Gelburd
中科院分区：
文献类型：
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作者：
D. Gelburd
一个文明过去繁荣的实物证据，如建筑物、纪念碑、灌溉结构和艺术品，经常在贫困地区被发现。19和20世纪的旅行者在欧洲、亚洲和美洲发现了这些看似矛盾的情况。“过去6,000年的历史记录表明，文明人，除了少数例外，从来没有能够在一个地方持续800到2,000年以上的进步文明。在大多数情况下，文明发展了几百年，然后衰落或被迫迁移到新的土地上。许多人研究了过去文明的衰落。在1938年和1939年，沃尔特·C。时任土壤保护局助理局长的罗德米尔克仔细研究了已经实行农业至少1,000年的国家。为了使美国能够从过去的教训中受益，他特别研究了为什么曾经耕种过的土地被浪费或破坏。从他对欧洲、北非和近东的研究以及他之前在中国的研究中，罗德民得出结论：
NOT infrequently, physical evidence of a civilization's past prosperity, such as buildings, monuments, irrigation structures, and art objects, has been discovered in areas beset by poverty. Nineteenth and twentieth century travelers found these seemingly paradoxical situations in Europe, Asia, and the Americas. “Historical records of the last 6,000 years show that civilized man, with few exceptions, has never been able to continue a progressive civilization in one locality for more than…800 to 2,000 years” ( 2 ). In most cases civilizations grew for a few hundred years, then declined or were forced onto new land. Many people have investigated the decline of past civilizations. In 1938 and 1939 Walter C. Lowdermilk, then assistant chief of the Soil Conservation Service, closely examined countries in which agriculture had been practiced for at least 1,000 years. So that the United States might benefit from the lessons of the past, he specifically sought out why once-cultivated land had been wasted or destroyed. From his study of Europe, North Africa, and the Near East and his previous research in China, Lowdermilk concluded …