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From dust bowl to dust bowl:soils are still very much a frontier of science

机译:从集尘桶到集尘桶:土壤仍然是科学的前沿

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摘要

When the Soil Science Society of America was created, 75 yr ago, the USA was suffering from major dust storms, causing the loss of enormous amounts of topsoil as well as human lives. These catastrophic events reminded public officials that soils are essential to society’s well-being. The Soil Conservation Service was founded and farmers were encouraged to implement erosion mitigation practices. Still, many questions about soil processes remained poorly understood and controversial. In this article, we argue that the current status of soils worldwide parallels that in the USA at the beginning of the 20th century. Dust bowls and large-scale soil degradation occur over vast regions in a number of countries. Perhaps more so even than in the past, soils currently have the potential to affect populations critically in several other ways as well, from their effect on global climate change, to the toxicity of brownfield soils in urban settings. Even though our collective understanding of soil processes has experienced significant advances since 1936, many basic questions still remain unanswered, for example whether or not a switch to no-till agriculture promotes C sequestration in soils, or how to account for microscale heterogeneity in the modeling of soil organic matter transformation. Given the enormity of the challenges raised by our (ab)uses of soils, one may consider that if we do not address them rapidly, and in the process heed the example of U.S. public officials in the 1930s who took swift action, humanity may not get a chance to explore other frontiers of science in the future. From this perspective, insistence on the fact that soils are critical to life on earth, and indeed to the survival of humans, may again stimulate interest in soils among the public, generate support for soil research, and attract new generations of students to study soils.
机译:75年前,当美国土壤科学学会成​​立时,美国正遭受沙尘暴的袭击,造成大量表土和人类生命的损失。这些灾难性事件提醒公共官员,土壤对于社会福祉至关重要。成立了土壤保护局,并鼓励农民采取减轻侵蚀的措施。但是,关于土壤过程的许多问题仍然知之甚少,并引起争议。在本文中,我们认为全球土壤的当前状况与20世纪初美国的状况相似。在许多国家的广大地区都发生了沙尘暴和大规模的土壤退化。也许甚至比过去更是如此,从对全球气候变化的影响到城市环境中的棕地土壤的毒性,土壤目前还可能以其他几种方式严重影响人口。尽管自1936年以来我们对土壤过程的集体理解取得了长足的进步,但许多基本问题仍未得到解答,例如,转向免耕农业是否促进了土壤中的碳固存,或者如何在模型中解释微观异质性土壤有机质转化鉴于我们(滥用)土壤所带来的巨大挑战,人们可能会认为,如果我们不迅速解决它们,在此过程中,请注意1930年代采取迅速行动的美国公职人员的榜样,人类可能不会将来有机会探索科学的其他前沿领域。从这个角度出发,坚持认为土壤对于地球上的生命乃至人类的生存至关重要,这一事实可能再次激发公众对土壤的兴趣,为土壤研究提供支持,并吸引新一代的学生研究土壤。

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