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The spatiotemporal spread of human migrations during the European Holocene 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (16) : 8989-9000
作者:  Racimo, Fernando;  Woodbridge, Jessie;  Fyfe, Ralph M.;  Sikora, Martin;  Sjogren, Karl-Goran;  Kristiansen, Kristian;  Vander Linden, Marc
收藏  |  浏览/下载：11/0  |  提交时间：2020/05/13
migrations  ancient DNA  Neolithic  Bronze Age  land cover  
Policy distortions, farm size, and the overuse of agricultural chemicals in China 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (27) : 7010-7015
作者:  Wu, Yiyun;  Xi, Xican;  Tang, Xin;  Luo, Deming;  Gu, Baojing;  Lam, Shu Kee;  Vitousek, Peter M.;  Chen, Deli
收藏  |  浏览/下载：9/0  |  提交时间：2019/11/27
crop yield  environmental protection  fertilizer use efficiency  socioeconomic barriers  urbanization