描绘
发表于 2025-3-26 22:43:38
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赞成你
发表于 2025-3-27 02:32:54
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要求比…更好
发表于 2025-3-27 05:52:58
Chemical Degradation of Soil,l. People are learning that the resiliency of soil is finite and that soil degradation is not easily reversed, if ever. The focus of land degradation in this century has been on soil erosion, as increasing areas of forest, grassland, and wetland have been cleared for crop production. Soil erosion re
Irritate
发表于 2025-3-27 09:41:44
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铁塔等
发表于 2025-3-27 17:00:14
Biological Degradation of Soil,ironment. Factors that affect these organisms, and/or their ability to mediate anthropic functions, have received attention in recent years. The purpose of this chapter is to present a review of the present literature that addresses the potential for biological degradation of soil. Biological degrad
特征
发表于 2025-3-27 18:15:55
Need for Action: Research and Development Priorities,r the world population, and to preserve a healthy status of global environment. Because the problem of soil degradation is very complex, it is important that we approach the issue in a systematic and logical manner. Some important issues to be addressed as researchable priorities are discussed in th
heirloom
发表于 2025-3-27 22:09:37
Book 1990ging natural re sources, particularly soil and water. Soil degradation is clearly one of the most pressing problems facing mankind. Although the spotlight regarding soil degradation in recent years has focused on Africa, concern about the degradation of soil and water resources is worldwide. The wi
动机
发表于 2025-3-28 05:42:18
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消极词汇
发表于 2025-3-28 10:20:01
Chemical Degradation of Soil, countries have similar programs. Soil erosion from land clearing and improper management in the developing world—and in particular those of the subtropics and tropics—has reached massive proportions and is the subject of worldwide attention.
conspicuous
发表于 2025-3-28 13:03:07
Salt-Affected Soils: Their Reclamation and Management for Crop Production,g the dissolved salts in soil solution. Fertilizers and decaying organic matter also serve as additional salt sources. Atmospheric salt depositions, though varying with location, may be an important source along the coasts. The relative significance of each source in contributing soluble salts depen