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Late-surviving stem mammal links the lowermost Cretaceous of North America and Gondwana (vol 558, pg 108, 2018) 期刊论文
NATURE, 2018, 562 (7728) : E27-E27
作者:  Huttenlocker, Adam K.;  Grossnickle, David M.;  Kirkland, James I.;  Schultz, Julia A.;  Luo, Zhe-Xi
收藏  |  浏览/下载:7/0  |  提交时间:2019/11/27
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