1. $lt;span class='magtech_ref_source'$gt; X, Zhang G, Yao S, Vishwakarma C, Dalin A M, Komarek D R, Kanter K F, Davis K, Pfeifer J, Zhao T, Zou P, D’Odorico C, Folberth F G, Rodriguez J, Fanzo L, Rosa W, Dennison M, Musumba A, Heyman E A Davidson. Quantitative assessment of agricultural sustainability reveals divergent priorities among nations. $lt;i$gt;One Earth$lt;/i$gt;, 2021, 4( 9): 1262–1277 $lt;/span$gt;
2. $lt;span class='magtech_ref_source'$gt; X P, Chen Z L, Cui P M, Vitousek K G, Cassman P A, Matson J S, Bai Q F, Meng P, Hou S C, Yue V, Römheld F S Zhang. Integrated soil-crop system management for food security. $lt;i$gt;Proceedings of the National Academy of Sciences of the United States of America$lt;/i$gt;, 2011, 108( 16): 6399–6404 $lt;/span$gt;
3. $lt;span class='magtech_ref_source'$gt; Y, Yin R, Zhao Y, Yang Q, Meng H, Ying K G, Cassman W, Cong X, Tian K, He Y, Wang Z, Cui X, Chen F Zhang. A steady-state N balance approach for sustainable smallholder farming. $lt;i$gt;Proceedings of the National Academy of Sciences of the United States of America$lt;/i$gt;, 2021, 118( 39): e2106576118 $lt;/span$gt;
4. $lt;span class='magtech_ref_source'$gt; D R, Kanter A R, Bell S S Mcdermid. Precision agriculture for smallholder nitrogen management. $lt;i$gt;One Earth$lt;/i$gt;, 2019, 1( 3): 281–284 $lt;/span$gt;
5. $lt;span class='magtech_ref_source'$gt; J, Shen Q, Zhu X, Jiao H, Ying H, Wang X, Wen W, Xu T, Li W, Cong X, Liu Y, Hou Z, Cui O, Oenema W J, Davies F Zhang. Agriculture green development: a model for China and the world. $lt;i$gt;Frontiers of Agricultural Science and Engineering$lt;/i$gt;, 2020, 7( 1): 5–13 $lt;/span$gt;